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Merc Elecs



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ELECTRICAL SYSTEMS




                     4
                     F



WIRING DIAGRAMS




  Index
Table of Contents
                                                                          Page
Wiring Colors for MerCruiser . . . . . . . . . . . . . . . 4F-1
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4F-2
  MCM (Stern Drive) . . . . . . . . . . . . . . . . . . . . . 4F-2
  MIE (Inboard) Models . . . . . . . . . . . . . . . . . 4F-10
Quicksilver Instrumentation . . . . . . . . . . . . . . . 4F-13
  MCM (Stern Drive) . . . . . . . . . . . . . . . . . . . . 4F-13
  MIE (Inboard) . . . . . . . . . . . . . . . . . . . . . . . . 4F-16
  Dual Station Wiring (Using a Neutral Safety
  Switch in Only One Remote Control) . . . . 4F-18
  Dual Station Wiring (Using A Neutral Safety
  Switch In Both Remote Controls) . . . . . . . 4F-19
  Dual Station Wiring (Using a Neutral Safety
  Switch in Engine Wiring Harness) . . . . . . . 4F-20
  Multi-Port Injection Wiring Diagram
   (Chart 1 Of 4) . . . . . . . . . . . . . . . . . . . . . . . . 4F-21
  Multi-Port Injection Wiring Diagram
   (Chart 2 Of 4) . . . . . . . . . . . . . . . . . . . . . . . . 4F-22
  Multi-Port Injection Wiring Diagram
   (Chart 3 Of 4) . . . . . . . . . . . . . . . . . . . . . . . . 4F-23
  Multi-Port Injection Wiring Diagram
   (Chart 4 Of 4) . . . . . . . . . . . . . . . . . . . . . . . . 4F-24
  Throttle Body Injection Wiring Diagram
   (Chart 1 Of 4) . . . . . . . . . . . . . . . . . . . . . . . . 4F-25
  Throttle Body Injection Wiring Diagram
   (Chart 2 Of 4) . . . . . . . . . . . . . . . . . . . . . . . . 4F-26
  Throttle Body Injection Wiring Diagram
   (Chart 3 Of 4) . . . . . . . . . . . . . . . . . . . . . . . . 4F-27
  Throttle Body Injection Wiring Diagram
   (Chart 4 Of 4) . . . . . . . . . . . . . . . . . . . . . . . . 4F-28




           Index
4F-0 - WIRING DIAGRAMS                                                            90-823224--2 796
Wiring Colors for MerCruiser

NOTE: Color codes listed below DO NOT apply to fuel injection system harnesses.

     BIA COLOR CODE AND ABBREVIATIONS                                    WHERE USED
BLACK (BLK)                                         All Grounds
BROWN (BLU)                                         Reference Electrode - MerCathode
ORANGE (ORN)                                        Anode Electrode-MerCathode
LT. BLUE/WHITE (LT BLU/WHT)                         Trim - "Up" Switch
GRAY (GRY)                                          Tachometer Signal
GREEN/WHITE (GRN/WHT)                               Trim - "Down" Switch
TAN (TAN)                                           Water Temperature Sender to Gauge
LIGHT BLUE (LIT BLU)                                Oil Pressure Sender to Gauge
PINK (PNK)                                          Fuel Gauge Sender to Gauge
BROWN/WHITE (BRN/WHT)                               Trim Sender to Trim Gauge
PURPLE/WHITE (PUR/WHT)                              Trim - "Trailer" Switch
RED (RED)                                           Unprotected Wires from Battery
RED/PURPLE (RED/PUR)                                Protected (Fused) Wires from Battery
RED/PURPLE (RED/PUR)                                Protected (+12V) to Trim Panel
ORANGE (ORN)                                        Alternator Output
PURPLE/YELLOW (PUR/YEL)                             Ballast Bypass
PURPLE (PUR)                                        Ignition Switch (+12V)
                                                    Starter Switch to Starter Solenoid to Neutral Start
YELLOW/RED (YEL/RED)
                                                    Switch




   Index
90-823224--2 796                                                                      WIRING DIAGRAMS - 4F-1
Engine
MCM (Stern Drive)
THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON EXHAUST ELBOW

                                                                    1                 3                          3




                                                                        2
                           1




                    2


                                                                                             3

                                         3
                                                                                  2
                                                                    1

                                 1
                                                                6




                                                         5
                                             4
                                     2



                                                 3

                                                                                                               50844


A - Ignition And Choke System                        C - Audio Warning System
1 - Distributor                                      1 - Oil Pressure Sender
2 - Ignition Module                                  2 - Water Temperature Sender
3 - Ignition Coil                                    3 - Trim Sender
B - Starting And Charging System                     D - Instrumentation System
1   -   Alternator                                   1 - Water Temperature
2   -   Ground Stud                                  2 - Oil Pressure Switch
3   -   Battery                                      3 - Drive Unit Oil Bottle (Old And New Style)
4   -   Starter Motor
5   -   Circuit Breaker
6   -   Starter Slave Solenoid
             Index
4F-2 - WIRING DIAGRAMS                                                                               90-823224--2 796
THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON DISTRIBUTOR



                                                                      1                3                      3


                                                                              C

                       1
                                                                          2




                                               A
                      WHT/RED


                       WHT/GRN

                            GRY

                           PUR                                                                 3

                                           2
                                                                                   2
                                                                      1       D
                            1

                                                                      6

                                                   4


                                                                  5

                                       2


                                                   3        B

                                                                                                           72936

A - Ignition And Choke System                          C - Audio Warning System
1 - Distributor With Ignition Module                   1 - Oil Pressure Sender
2 - Ignition Module                                    2 - Water Temperature Sender
3 - Ignition Coil                                      3 - Trim Sender
B - Starting And Charging System                       D - Instrumentation System
1   -   Alternator                                     1 - Water Temperature
2   -   Ground Stud                                    2 - Oil Pressure Switch
3   -   Battery                                        3 - Drive Unit Oil Bottle (Old And New Style)
4   -   Starter Motor
5   -   Circuit Breaker
6   -   Starter Slave Solenoid



    Index
90-823224--2 796                                                                            WIRING DIAGRAMS - 4F-3
THUNDERBOLT V


                                                                                  1
                                                                                                      3

                                                                                              C
                                                       A
                                                                                          2
                         1
                                                               4



                                               3
                              2


                                                                                                                   3
                                                                                 1                2


                                                                                              D
                                 1

                                                                                      7



                                           3       5
                                                                                 6

                        2


                                                           4
                    B
                                                                                                                          73996




A - Ignition And Choke System                                      C - Audio Warning System
1   -   Distributor With Ignition Module                           1 - Oil Pressure Sender
2   -   Timing Lead                                                2 - Water Temperature Sender
3   -   Knock Sensor                                               3 - Trim Sender
4   -   Ignition Coil                                              D - Instrumentation System
B - Starting And Charging System                                   1 - Water Temperature
1   -   Alternator                                                 2 - Oil Pressure Switch
2   -   Electric Choke                                             3 - Drive Unit Oil Bottle (Old And New Style)
3   -   Ground Stud
4   -   Battery
5   -   Starter Motor
6   -   Circuit Breaker
7   -   Starter Slave Solenoid
             Index
4F-4 - WIRING DIAGRAMS                                                                                             90-823224--2 796
ALL MCM THROTTLE BODY / MULTI-PORT INJECTION STARTING AND CHARGING DIAGRAM



                                                              B                    2                           2




                                                                         1




                                                                 C                        3


                                                                               2
                                                                     1



                                                             6


                     1                                                                                         c
                                                      5
                                       3
                                                                                                         b

                                   2

                 A                            4                                           a
                                                                     d
                                                                                                          71693

A - Charging And Starting System                      C - Instrumentation System
1   -   Alternator                                    1 - Oil Pressure Sender
2   -   Ground Stud                                   2 - Water Temperature Sender
3   -   Starter Motor                                 3 - Trim Sender
4   -   Battery
5   -   Circuit Breaker
6   -   Starter Slave Solenoid                        a - Positive (12V) Power Wire To Furl Injection System
                                                          Harness
B - Audio Warning System / Power Reduction            b - Harness Connector To Fuel Injection System Harness
Circuit (Not Present On 1996 And Newer Models)        c - Auxiliary Tachometer Lead
1 - Oil Pressure                                      d - 90 Amp. Fuse (DO NOT Remove)
2 - Drive Unit Oil Level Bottle (New And Old Style)




    Index
90-823224--2 796                                                                         WIRING DIAGRAMS - 4F-5
ALL THROTTLE BODY / MULTI-PORT INJECTION INBOARD AND SKI ENGINES


                                                                A
                                                                                      2



                                                                      1




                                                                  B                       NOTE 1



                                                                                  2
                                                                      1


                                                              5

                                             4                                                         c
                         1
                                                                              6

                                                                                                      b
                                         3
                                     2

                                                                                          a
                      C                                                   d

NOTE 1: Taped back BROWN and BLACK wire may be used for an accessory. LOAD MUST NOT EXCEED 5
AMPS
A - Audio Warning System                        C - Charging And Starting System
1 - Oil Pressure Switch                          1   -   Alternator
2 - Transmission Fluid Temperature               2   -   Ground Stud
B - Instrumentation System                       3   -   Starter
                                                 4   -   Circuit Breaker
1 - Oil Pressure Sender                          5   -   Starter Slave Solenoid
2 - Water Temperature Sender                     6   -   Neutral Safety Switch


                                                 a - Positive (12V) Power Wire To Fuel Injection System
                                                     Harness
                                                 b - Harness Connector To Fuel Injection System Harness
                                                 c - Auxiliary Tachometer Lead
                                                 d - 90 Amp. System Fuse




        Index
4F-6 - WIRING DIAGRAMS                                                                             90-823224--2 796
MCM 7.4LX / MIE 7.4L THROTTLE BODY INJECTION
                                                                                                              NOTE 1

                                          3




                                                8
       4                                                                               12




                                                         9
                                                    10

                                                                      2                       6


                                                                 7

                                                                                                         16
                                 11                          5
                                                                                                                   17
                                                                                         14
  18
                                                                                                  13          15

               19



                                                                              1
                                                                                                                           75001




Note: All BLACK Wires With A Ground Symbol Are Interconnected Within The Fuel Injection System Harness.
NOTE 1: As a mid year (96-1/2) model change, the Throttle Body and Multi-Port Injection models have the lan-
yard stop connector removed from the wiring harness. The dual engine capability is relocated by routing the YEL
wire to the Data Link Connector (DLC).
1 -   Fuel Pump                                                      11-   Engine Coolant Temperature (ECT) Sensor
2 -   Throttle Body                                                  12-   Electronic Control Module (ECM)
3 -   Distributor                                                    13-   Fuel Pump Relay
4 -   Coil                                                           14-   Ignition/System Relay
5 -   Electronic Spark Control (KS) Module                           15-   Fuse (15 Amp) Fuel Pump
6 -   Data Link Connector (DLC)                                      16-   Fuse (15 Amp) ECM/DLC/Battery
7 -   Manifold Absolute Pressure (MAP) Sensor                        17-   Fuse (10 Amp) ECM/Injector/Ignition/Knock Module
8 -   Knock Sensor                                                   18-   Harness Connector To Starting/Charging Harness
9 -   Idle Air Control (IAC)                                         19-   Positive (+) Power Wire To Engine Circuit Breaker
10-   Throttle Position (TP) Sensor


   Index
90-823224--2 796                                                                                          WIRING DIAGRAMS - 4F-7
7.4L / 7.4LX / 454 / 502 MULTI-PORT MAGNUM ENGINE DIAGRAM MODELS WITH VST

  NOTE 1

                                                                                                  1


                                     3

                                                     7

                                                                              8
       4
                                2
                                                9



            11            10                                                            13                           20




                                                                                    6




                                                                                                      18
                                    12
                                                         5
                                                                                                               17
                                                                                                                     21
 19                                                                                     15

                                                                                             14              16

           22                                                                                                       71692




NOTE 1: As a mid year (96-1/2) model change, the Throttle Body and Multi Port Injection models have the lan-
yard stop connector removed from the wiring harness. The dual engine capability is relocated by routing the YEL
wire to the Data Link Connector (DLC).
NOTE 2: All BLACK wires with a ground symbol are interconnected within the fuel injection system harness.

1 -   Vapor Separator Tank                                   12-   Engine Coolant Temperature (ECT) Sensor
2 -   Throttle Body                                          13-   Electronic Control Module (ECM) Sensor
3 -   Distributor                                            14-   Fuel Pump Relay
4 -   Coil                                                   15-   Ignition Relay
5 -   Knock Sensor (KS) Module                               16-   Fuel Pump Relay (15 Amp)
6 -   Data Link Connector (DLC)                              17-   Injector Fuse 15 Amp.) ECM, DLC, Battery
7 -   Manifold Absolute Pressure (MAP) Sensor                18-   ECM Fuse (10 Amp.) ECM, Ignition, Injectors, Knock Sen-
8 -   Intake Air Temperature (IAT) Sensor                          sor Module
9 -   Knock Sensor (KS)                                      19-   Harness Connector To Starting / Charging Harness
10-   Idle Air Control (IAC)                                 20-   Harness Connector To Lanyard Stop Switch (Optional)
11-   Throttle Positive Sensor (TP)                          21-   Harness Connector For Dual Engine Data Link Cable
                                                             22-   Positive (+) Power Wire To Engine Circuit Breaker


           Index
4F-8 - WIRING DIAGRAMS                                                                                     90-823224--2 796
7.4L / 7.4LX / 454 / 502 MULTI-PORT MAGNUM ENGINE DIAGRAM MODELS WITH COOL FUEL
SYSTEM




                                           3

                                                    7


                   4
                                       2
                                                8                              12


                       10         9




                                                                                6




                                                                                                 17
               18                          11             5
                                                                                                        16
                                                                                         14


                                                                                          13           15

                            19

                                                                                    1

                                                                                                                  75146




NOTE: All BLACK wires with a ground symbol are interconnected within the EFI system harness.

1 -   Fuel Pump                                         11-   Engine Coolant Temperature (ECT) Sensor
2 -   Throttle Body                                     12-   Electronic Control Module (ECM)
3 -   Distributor                                       13-   Fuel Pump Relay
4 -   Coil                                              14-   Ignition/System Relay
5 -   Electronic Spark Control (KS) Module              15-   Fuse (15 Amp) Fuel Pump
6 -   Data Link Connector (DLC)                         16-   Fuse (15 Amp) ECM/DLC/Battery
7 -   Manifold Absolute Pressure (MAP) Sensor           17-   Fuse (10 Amp) ECM/Injector/Ignition/Knock Module
8 -   Knock Sensor                                      18-   Harness Connector To Starting/Charging Harness
9 -   Idle Air Control (IAC)                            19-   Positive (+) Power Wire To Engine Circuit Breaker
10-   Throttle Position (TP) Sensor




   Index
90-823224--2 796                                                                               WIRING DIAGRAMS - 4F-9
MIE (Inboard) Models

THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON EXHAUST ELBOW




                                                             1         C
                     A
                            1

                                                                 2                 3



                       2

                                                             1                         D
                                      3
                                                                         2         NOTE



                                1
                                                         7



                                                    5
                                                                         6
                                          4

                           B          2

                                              3
                                                                                               50773

NOTE: Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMPS.

A - Ignition And Choke System                     C - Audio Warning System
1 - Distributor                                   1 - Water Temperature
2 - Ignition Module                               2 - Oil Pressure
3 - Ignition Coil                                 3 - Transmission Fluid Temperature
B - Starting And Charging System                  D - Instrumentation System
1   -   Alternator                                1 - Oil Pressure Sender
2   -   Ground Stud                               2 - Water Temperature Sender
3   -   Battery
4   -   Starter Motor
5   -   Circuit Breaker
6   -   Neutral Start Safety Switch
7   -   Starter Slave Solenoid

             Index
4F-10 - WIRING DIAGRAMS                                                                    90-823224--2 796
THUNDERBOLT IV IGNITION MODULE MOUNTED ON DISTRIBUTOR




                       A                                                                   C
                                                                   1

                              1



                                                                           3              2

                              WHT/RED

                               WHT/GRN

                                  GRY

                                  PUR                                  1                      D
                                             2                                            NOTE
                                                                               2



                                   1
                                                               7



                                                         5
                                             4                                 6
                              B          2


                                                 3
                                                                                                      72937




NOTE: Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMPS.

A - Ignition And Choke System                        C - Audio Warning System
1 - Distributor                                      1 - Water Temperature
2 - Ignition Module                                  2 - Oil Pressure
3 - Ignition Coil                                    3 - Transmission Fluid Temperature
B - Starting And Charging System                     D - Instrumentation System
1   -   Alternator                                   1 - Oil Pressure Sender
2   -   Ground Stud                                  2 - Water Temperature Sender
3   -   Battery
4   -   Starter Motor
5   -   Circuit Breaker
6   -   Neutral Start Safety Switch
7   -   Starter Slave Solenoid


    Index
90-823224--2 796                                                                          WIRING DIAGRAMS - 4F-11
THUNDERBOLT V



                        A                                                             3
                                                                                                C
                                                                       1



                                                                              2
                             1                         4



                                               3
                                  2


                                                                         1                      D
                                                                                          2   NOTE


                                   1

                                                                        7

                                                   5
                                                                                  8
                                                                        6

                             2             3


                                                   4
                         B                                                                                  74160



NOTE: Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMPS.

A - Ignition And Choke System                              C - Audio Warning System
1   -   Distributor With Ignition Module                   1 - Water Temperature Sender
2   -   Timing Lead                                        2 - Oil Pressure Sender
3   -   Knock Sensor                                       3 - Transmission Fluid Temperature
4   -   Ignition Coil                                      D - Instrumentation System
B - Starting And Charging System                           1 - Water Temperature
1   -   Alternator                                         2 - Oil Pressure Switch
2   -   Electric Choke
3   -   Ground Stud
4   -   Battery
5   -   Starter Motor
6   -   Circuit Breaker
7   -   Starter Slave Solenoid
8   -   Neutral Start Safety Switch


             Index
4F-12 - WIRING DIAGRAMS                                                                              90-823224--2 796
Quicksilver Instrumentation
MCM (Stern Drive)
EARLIER STYLE CONTROL AND AUDIO WARNING BUZZER




                                                             1




                       2                        3                     4                  5




                                    6               8


                                                                                     7
                                                        NOTES 1 & 2




                                                                                                                    72938




Refer to gauge manufacturer's instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubber
sleeve over connection.
NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 35-40
amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) har-
ness wire connected to it.

1   -   Audio Warning Buzzer (If So Equipped)                             5   -   Battery Meter
2   -   Tachometer                                                        6   -   Ignition Switch
3   -   Oil Pressure                                                      7   -   Trim Indicator
4   -   Water Temperature                                                 8   -   20 Amp. Fuse


    Index
90-823224--2 796                                                                                    WIRING DIAGRAMS - 4F-13
454/502 MAGNUM MULTI-PORT INJECTION WITH EARLIER STYLE CONTROLS AND AUDIO
WARNING BUZZER




                                                         1




               2
                                             3                     4                       5




                                                 8
                                6                                  7


                                                     NOTES 1 & 2




                                                                                                          71695




Refer to gauge manufacturer's instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubber
sleeve over connection.
NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 40
amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) har-
ness wire connected to it.
1   -   Audio Warning Buzzer (If Equipped)                             5   -   Battery Meter
2   -   Tachometer                                                     6   -   Ignition Switch
3   -   Oil Pressure                                                   7   -   Trim Indicator
4   -   Water Temperature                                              8   -   20 Amp. Fuse

             Index
4F-14 - WIRING DIAGRAMS                                                                          90-823224--2 796
LATER STYLE CONTROLS AND AUDIO WARNING BUZZER




                               1




               2
                                         3                4                         5




                               6             8   NOTE 2

                                                          7


                                                                                                 NOTE 1
                      NOTE 1




                                                              NOTE 1




                                                                                                                         74046


Refer to gauge manufacturer's instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubber
sleeve over connection.
NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 40
amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) har-
ness wire connected to it.

1   -   Audio Warning Buzzer (If Equipped)                             5   -   Battery Meter
2   -   Tachometer                                                     6   -   Ignition Switch
3   -   Oil Pressure                                                   7   -   Trim Indicator
4   -   Water Temperature                                              8   -   20 Amp. Fuse

    Index
90-823224--2 796                                                                                          WIRING DIAGRAMS - 4F-15
MIE (Inboard)
EARLIER STYLE AUDIO WARNING BUZZER




                                                1




            2
                                        3           4          5




                             6              7
                                        B
                                    S
                                        I




                                                                                                       72939



Refer to gauge manufacturer's instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubber
sleeve over connection.
NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 40
amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) har-
ness wire connected to it.

1   -   Audio Warning Buzzer (If So Equipped)           5 - Battery Meter
2   -   Tachometer                                      6 - Ignition Switch
3   -   Oil Pressure                                    7 - 20 Amp. Fuse
4   -   Water Temperature




             Index
4F-16 - WIRING DIAGRAMS                                                                      90-823224--2 796
LATER STYLE AUDIO WARNING BUZZER


                                                   7




                                   2




                  1
                                               3           4                      5




                              6
                                           B
                                       S
                                           I


                                                       8


                                                                                                                    74274



Refer to gauge manufacturer's instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection and
slide rubber sleeve over connection.
NOTE 2: Power for a second fused accessory panel may be taken from this connection. Load MUST NOT ex-
ceed 35-40 amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK
(ground) harness wire connected to it.

1   -   Audio Warning Buzzer (If So Equipped)                  5   -   Battery Meter
2   -   Tachometer                                             6   -   Ignition Switch
3   -   Oil Pressure                                           7   -   To 12 Volt Source (PURPLE Wire Connection)
4   -   Water Temperature                                      8   -   20 Amp. Fuse




    Index
90-823224--2 796                                                                                    WIRING DIAGRAMS - 4F-17
Dual Station Wiring (Using a Neutral Safety Switch in Only One Remote
Control)

                 A                         1                             2                                             3                                            4                               5

                                                 L                GND
                                                 T     SW
                                                            UNSW                                                                                                                            GND
                                                                                           L                     GND                    L               GND                  L
                                                     12V
                                                                                           T         12V                                T         12V                        T    12V

                                                                                                SEND                                         SEND                                SEND
                                                     SIG




                               PUR


                                GRY




                                                                                                       LT. BLU




                                                                                                                                                                PUR
                                                                                               PUR




                                                                                                                                            PUR




                                                                                                                                                                           BLK
                                BLK
                                                                              BLK
                                                                                    BLK




                                                                                                                           BLK



                                                                                                                                                    TAN
                     YEL/RED




                                                           GRY
                                                 PUR




                               NOTE 3
                                                                                                                                                                                 YEL/RED
                                                                                                                                                                                                                         NOTE 1



                                                     1                                2                                                 3                                                                       5
                   RED/PUR                                                                                                                                                       4                                        BRN/WHT
                                                                              GND
                                                             L
                                       B                     T     SW UNSW
                                      SI                                                                                         GND                L                GND                                GND
                                                                                                           L                                                                         L
                     7                                           12V                                       T
                                                                                                                  12V
                                                                                                                                                    T
                                                                                                                                                              12V                    T            12V

                                                                                                                 SEND                                   SEND                                SEND
                                                                  SIG



                  RED/PUR
                                                                                                                                                        PUR
                                                                                                               PUR




                                                                                                                                                               TAN
                                                                                     BLK
                                                                                           BLK



                                                                                                                       LT. BLU




                                                                                                                                                                                        RED/PUR
                                                                                                                                       BLK
                                 YEL/RED




                                                                                                                                                                                                          BLK
                                                                        GRY
                                                             PUR




                                                                                                                                                                                                                NOTE 2
                                           PUR                                                                                                                                                     PUR


                                                         YEL/RED

                                                                                                                                                                        NOTE 3
                                                 NOTE 3


                                                                 NOTE 3
                                                                                                                                NOTE 1
                                                                                                                                                                                 BRN/WHT
                                                                                                                           YEL/RED
                B                                                                                                                            YEL/RED                                                                              6
                                                                                                                                                                                                                                      72940

NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with Mer-
Cruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruiser
Inboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes).
NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the primary
station and secondary station MUST NOT exceed 35 amperes.
NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection and
slide rubber sleeve over connection.

B - Secondary Station                                                                                                                   B - Primary Station
1   -   Start - Stop Panel                                                                                                              1     -    Ignition Switch
2   -   Tachometer                                                                                                                      2     -    Tachometer
3   -   Oil Pressure                                                                                                                    3     -    Oil Pressure
4   -   Water Temperature                                                                                                               4     -    Water Temperature
5   -   Battery Meter                                                                                                                   5     -    Battery Meter


             Index
4F-18 - WIRING DIAGRAMS                                                                                                                                                                                                     90-823224--2 796
Dual Station Wiring (Using A Neutral Safety Switch In Both Remote Controls)

               A                                                                    2
                                                  1                                                                               3                                      4                                   5

                                                       L                GND
                                                       T    SWUNSW
                                                                                                                                             L                                      L              GND
                                                                                                 L                    GND                                        GND
                                                           12V                                                                               T                                      T
                                                                                                 T                                                                                        12V
                                                                                                           12V                                         12V

                                                                                                      SEND                                         SEND                                  SEND
                                                            SIG




                                 PUR




                                                                                                                                                                                                                                      YEL/RED
                                  GRY




                                                                                                                 LT. BLU




                                                                                                                                                                         PUR
                                                                                                     PUR




                                                                                                                                                 PUR




                                                                                                                                                                                   BLK
                                  BLK



                                                                                    BLK
                                                                                          BLK




                                                                                                                                  BLK



                                                                                                                                                             TAN
                   YEL/RED




                                                                  GRY
                                                       PUR




                                                                                                                                                                                                                                                 NOTE 3
                                 NOTE 3
                                                                                                                                                                                    YEL/RED                                                     NOTE 1



                                                            1                              2                                                 3                                                                          5
                RED/PUR                                                                                                                                                                  4                                                       BRN/WHT
                                                                                    GND
                                                                    L
                                             B                      T     SW UNSW
                                        S                                                                        L                     GND                   L               GND             L                   GND
                                             I                                                                                                               T
                                                                        12V                                      T                                                 12V                       T             12V
                                                                                                                           12V


                             7                                          SIG
                                                                                                                           SEND                                    SEND                               SEND




                   ORN
                 RED/PUR
                                                                                                     BLK




                                                                                                                                                                                                 RED/PUR
                                                                                                                                                                 PUR
                                                                                                                       PUR




                                                                                                                                                                       TAN
                                                                                                                             LT. BLU
                                                                                           BLK




                                                                                                                                             BLK
                                                                              GRY
                                   YEL/RED




                                                                    PUR




                                                                                                                                                                                                                             NOTE 2




                                                                                                                                                                                                                       BLK
                                                 PUR



                                                                                                                                                                                                             PUR
                                                                                                                                                                                                                                                    6


                                                                                                                                                                               NOTE 3


                                                                                    YEL/RED
                                                                                                                                                 NOTE 1                                                                  YEL/RED
                                                                          NOTE 3                                                                                                          BRN/WHT                                                NOTE 3
                                       YEL/RED
               B                       YEL/RED
                                                                                                                                                                                                                                                           72941

NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with Mer-
Cruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruiser
Inboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes).
NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the primary
station and secondary station MUST NOT exceed 35 amperes.
NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection and
slide rubber sleeve over connection.

A - Secondary Station                                                                                                                              B - Primary Station
1   -   Start - Stop Panel                                                                                                                         1    -    Ignition Switch
2   -   Tachometer                                                                                                                                 2    -    Tachometer
3   -   Oil Pressure                                                                                                                               3    -    Oil Pressure
4   -   Water Temperature                                                                                                                          4    -    Water Temperature
5   -   Battery Meter                                                                                                                              5    -    Battery Meter
                                                                                                                                                   6    -    To Engine
                                                                                                                                                   7    -    20 Ampere Fuse
    Index
90-823224--2 796                                                                                                                                                                                                                 WIRING DIAGRAMS - 4F-19
Dual Station Wiring (Using a Neutral Safety Switch in Engine Wiring Harness)

            A                                          1
                                                                                             2
                                                                                                                                            3                                   4                                      5

                                                           L                   GND
                                                           T     SW
                                                                   UNSW
                                                                                                        L                                         L                    GND                L               GND
                                                               12V                                                          GND                                                           T
                                                                                                        T                                         T
                                                                                                                  12V                                        12V                                12V

                                                                                                             SEND                                           SEND                               SEND
                                                               SIG




                                 PUR


                                  GRY




                                                                                                                    LT. BLU




                                                                                                                                                                               PUR
                                                                                                            PUR




                                                                                                                                                      PUR




                                                                                                                                                                                         BLK
                                  BLK

                                                                                           BLK
                                                                                                 BLK




                                                                                                                                       BLK



                                                                                                                                                               TAN
                   YEL/RED




                                                                     GRY
                                                           PUR




                                 NOTE 3
                                                                                                                                                                                                YEL/RED                                      NOTE 1



                                                                1                                      2                                              3                                        4                                   5
                  RED/PUR                                                                                                                                                                                                                     BRN/WHT
                                                                                           GND
                                                                           L
                                                 B                         T    SW UNSW
                                            S                                                                           L                   GND                    L               GND             L                   GND
                                                 I                                                                      T                                          T
                                                                               12V                                                                                       12V                       T             12V
                                                                                                                              12V


                             7                                                 SIG
                                                                                                                              SEND                                      SEND                                 SEND




                  RED/PUR
                                                                                                  BLK
                                                                                                            BLK




                                                                                                                                                                       PUR
                                                                                                                            PUR




                                                                                                                                                                             TAN
                                                                                                                                  LT. BLU




                                                                                                                                                                                                       RED/PUR
                                                                                                                                                  BLK
                                                                       PUR
                                                                                     GRY
                                       YEL/RED




                                                                                                                                                                                                                             BLK
                                                     PUR                                                                                                                                                                           NOTE 2
                                                                                                                                                                                                                   PUR                                6
                                                                     YEL/RED

                                                                                                                                                                                     NOTE 3
                                                           NOTE 3



                                                                                                                                                      NOTE 1                                                                       YEL/RED
                                                                                                                                                                                               BRN/WHT                                        NOTE 3
            B
                                                                                                                                                                                                                                                          72942

NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with Mer-
Cruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruiser
Inboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes).
NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the primary
station and secondary station MUST NOT exceed 35 amperes.
NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection and
slide rubber sleeve over connection.

A - Secondary Station                                                                                                                             B - Primary Station
1   -   Start - Stop Panel                                                                                                                        1     -   Ignition Switch
2   -   Tachometer                                                                                                                                2     -   Tachometer
3   -   Oil Pressure                                                                                                                              3     -   Oil Pressure
4   -   Water Temperature                                                                                                                         4     -   Water Temperature
5   -   Battery Meter                                                                                                                             5     -   Battery Meter
                                                                                                                                                  6     -   To Engine
                                                                                                                                                  7     -   20 Ampere Fuse
             Index
4F-20 - WIRING DIAGRAMS                                                                                                                                                                                                                      90-823224--2 796
Multi-Port Injection Wiring Diagram (Chart 1 Of 4)



                                             INJECTORS 2, 3, 5, 8


                                                                       467 DK BLU




            10A
            15A                              INJECTORS 1, 4, 6, 7


                                                                          DK GRN


                                  PORT FUEL JUMPER IS
                                 CONNECTED ONLY IN MPI
                                     APPLICATIONS


                                                                                                              R




                   15A
                                  87a 30 85 86 87




                                                                             BLK




                                                                    441 BLU/WHT
                   IDLE AIR                                         442 BLU/BLK
                   CONTROL
                   (IAC) VALVE                                      443 GRN/WHT
                                                                    444 GRN/BLK


                                            C          BLK
                   DUAL ENGINE DATA LINK
                   (MULTIPLE ENGINE         B                             916 YEL   J1-5   MASTER/SLAVE
                   APPLICATION SOME MODELS)
                                            A
  SOME MODELS
  WILL HAVE THE                                                     461 ORN/BLK
  DUAL ENGINE                               916 YEL
  DATA LINK                                           BLK
                                 DLC
  MOVED TO THE
  DLC
         TO ECM/BAT
            FUSE
             15A


                    440 ORN                                                                MALFUNCTION INDICATOR LAMP




   Index
90-823224--2 796                                                                                WIRING DIAGRAMS - 4F-21
Multi-Port Injection Wiring Diagram (Chart 2 Of 4)




                                                      INTAKE AIR TEMPERATURE
      INTAKE AIR
                                                      (IAT) SENSOR SIGNAL
      TEMPERATURE
                                                      (THIS SENSOR IS NOT ON
      (IAT)
                                                      5.7L / 350 CID ENGINES)




                                 B
                                 C
                          (TP)
                                 A




         ENGINE COOLANT
         TEMPERATURE
         (ECT)                                       ENGINE COOL-
                                                     ANT
                                                     TEMPERATURE
                                                     (ECT) SENSOR
                                                     SIGNAL




        Index
4F-22 - WIRING DIAGRAMS                                             90-823224--2 796
Multi-Port Injection Wiring Diagram (Chart 3 Of 4)




                                   IC MODULE
                                    EST MODULE




                                   B A




                                                                                  ELECTRONIC SPARK TIMING (EST)
                                                                                  IGNITION CONTROL

                                                             430 PUR/WHT          DIST. REFERENCE "HIGH"

                                                                                  BYPASS

                                                                                  DIST. REFERENCE "LOW"



                                                       BRN




                          86




   TO BUZZER       TAN/        D            121
                   BLU                      TAN
   TO IGN          PUR         C   3 PNK
   TO AUDIO
   WARNING         BLU/        B
   SWITCHES
                   TAN
   TO TACH          GRY        A             121
                                             WHT




                                                                                  COOLANT OVERTEMP
                                                                                  (TO BUZZER)
                                                                                  LOW OIL PRESSURE/LOW
                                                                                  I/O FLUID (TO BUZZER)

                                                 931                       J1-6   TO LOW OIL PRESSURE AND
                                                 BRN                              GEAR LUBE SWITCHES OR
                                                                                  TRANS. TEMPERATURE




   Index
90-823224--2 796                                                                         WIRING DIAGRAMS - 4F-23
Multi-Port Injection Wiring Diagram (Chart 4 Of 4)




                                                                         TO IGN COIL TERM B

                                                                         TO FUEL PUMP RELAY FUSE 15A

                                                                                 TO INJECTORS
                              SYSTEM/IGNITION RELAY


                          8                   8
                          6                   5

                                              8
                                              7
                          ECM BAT FUSE/               10A
                            DLC 15A




           TO DLC CONNECTOR


                                                                  439 PNK/BLK




                               KNOCK                                                                   KNOCK
                               SENSOR (KS)                                                             SENSOR (KS)
                               MODULE




                                                                                                   LANYARD STOP
                                                       A                                           SWITCH CIRCUIT
            CONNECTOR NOT PRESENT                                                                  (OPTIONAL)
           ON SOME MULTI-PORT MODELS
                                                       B    BLK




        Index
4F-24 - WIRING DIAGRAMS                                                                                         90-823224--2 796
Throttle Body Injection Wiring Diagram (Chart 1 Of 4)



                                                INJECTOR

                                                               467 DK BLU




            10A
            15A                                 INJECTOR

                                                                  DK GRN




                                                                                                      R




                   15A
                                  87a 30 85 86 87




                                                                     BLK




                                                            441 BLU/WHT
                   IDLE AIR                                 442 BLU/BLK
                   CONTROL
                   (IAC) VALVE                              443 GRN/WHT
                                                            444 GRN/BLK


                                            C         BLK
                   DUAL ENGINE DATA LINK
                   (MULTIPLE ENGINE         B                     916 YEL   J1-5   MASTER/SLAVE
                   APPLICATION SOME MODELS)
                                            A
  SOME MODELS
  WILL HAVE THE                                             461 ORN/BLK
  DUAL ENGINE                               916 YEL
                                                      BLK
  DATA LINK                      DLC
  MOVED TO THE
  DLC
         TO ECM/BAT
            FUSE
             15A


                    440 ORN                                                        MALFUNCTION INDICATOR LAMP




   Index
90-823224--2 796                                                                        WIRING DIAGRAMS - 4F-25
Throttle Body Injection Wiring Diagram (Chart 2 Of 4)




                                 B
                                 C
                          (TP)
                                 A




           ENGINE COOL-
           ANT                                          ENGINE COOLANT
           TEMPERATURE                                  TEMPERATURE (ECT)
           (ECT)                                        SENSOR SIGNAL




        Index
4F-26 - WIRING DIAGRAMS                                                90-823224--2 796
Throttle Body Injection Wiring Diagram (Chart 3 Of 4)




                                   IC MODULE
                                    EST MODULE




                                   B A




                                                                                  ELECTRONIC SPARK TIMING (EST)
                                                                                  IGNITION CONTROL

                                                             430 PUR/WHT          DIST. REFERENCE "HIGH"

                                                                                  BYPASS

                                                                                  DIST. REFERENCE "LOW"



                                                       BRN




                          86




   TO BUZZER       TAN/        D            121
                   BLU                      TAN
   TO IGN          PUR         C   3 PNK
   TO AUDIO
   WARNING         BLU/        B
   SWITCHES
                   TAN
   TO TACH          GRY        A             121
                                             WHT




                                                                                  COOLANT OVER-
                                                                                  TEMP (TO BUZZER)
                                                                                  LOW OIL PRESSURE/LOW
                                                                                  I/O FLUID (TO BUZZER)

                                                 931                       J1-6   TO LOW OIL PRESSURE AND
                                                 BRN                              GEAR LUBE SWITCHES OR
                                                                                  TRANS. TEMPERATURE




   Index
90-823224--2 796                                                                         WIRING DIAGRAMS - 4F-27
Throttle Body Injection Wiring Diagram (Chart 4 Of 4)



                                                                         TO IGN COIL TERM B

                                                                         TO FUEL PUMP RELAY FUSE 15A

                                                                                 TO INJECTORS
                              SYSTEM/IGNITION RELAY


                          8                   85
                          6

                                              87

                          ECM BAT FUSE/               10A
                            DLC 15A




           TO DLC CONNECTOR


                                                                  439 PNK/BLK




                               KNOCK                                                                   KNOCK
                               SENSOR (KS)                                                             SENSOR (KS)
                               MODULE




                                                                                                   LANYARD STOP
                                                       A                                           SWITCH CIRCUIT
                CONNECTOR NOT PRESENT
                  ON SOME EFI MODELS                                                               (OPTIONAL)
                                                       B    BLK




        Index
4F-28 - WIRING DIAGRAMS                                                                                         90-823224--2 796
                    THIS PAGE IS INTENTIONALLY BLANK TO
                   ALLOW FOR CORRECTIONS OR ADDITIONS
                              AT A LATER DATE




   Index
90-823224--2 796                                      WIRING DIAGRAMS - 4F-29
                   THIS PAGE IS INTENTIONALLY BLANK TO
                  ALLOW FOR CORRECTIONS OR ADDITIONS
                             AT A LATER DATE




        Index
4F-30 - WIRING DIAGRAMS                                  90-823224--2 796


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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.