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MARINE DIESEL ENGINES
W-13, W-21 , W-27, W-33
PUBLICATION NO. 32363
~ WESTERBEKE CORPORA TlON' 150 JOHN HANCOCK ROAD
I MYLES STANDISH INDUSTRIAL PARK· TAUNTON MA 02780
NAMIA Member National Marine Manufacturers Association
PROPOSITION 65 WARNING
Diesel engine exhaust and some
of its constituents are known to
the State of California to cause
cancer, birth defects, and other
Exhaust gasses contain Carbon Monoxide, an odorless and
colorless gas. Carbon Monoxide is poisonous and can cause
unconsciousness and death. Symptoms of Carbon Monoxide
exposure can include:
- Dizziness - Throbbing in Temples
-Nausea - Muscular Twitching
-Headache - Vomiting
- Weakness and Sleepiness -Inability to Think Coherently
IF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE SYMPTOMS,
6ET OUT INTO THE FRESH AIR IMMEDIATELY. If symptoms persist,
seek medical attention. Shut down the unit and do not restart
until it has been inspected and repaired.
This WARNING DECAL is provided by
WESTERBEKE and should be fixed to a
bulkhead near your engine or generator.
WESTERBEKE also recommends installing
CARBON MONOXIDE DETECTORS in the
living/sleeping quatters of your vessel.
They are inexpensive and easily
obtainable at your local marine store.
Thank you for having selected a Westerbeke Diesel Engine for your
This manual describes the procedures for proper handling and main-
tenance of the Engine Models W13, W21, W27 and W33.
To maintain your engine always in its best operating condition and
to enable it to perform best, it is important to handle it properly
and carry out complete maintenance according to this manual.
If you have any questions about your engine or in the event of a
failure, please contact your nearest distributor or dealer.
We look forward to your continued patronage.
LEFT SIDE~ W-21 WITH 2:1 HBW-50 TRANSMISSION
TABLE OF CONTENTS
GENERAL SPECIFICATIONS ··.·······.···· 3
CAUTIONS IN HANDLING ENGINE ··.···..·· 4
1. BREAKING IN..................... 5
2. PREPARATIONS. · · · · · · . · · · · · · · · . · ·· 6
3. STARTING PROCEDURES ··..........· 7
4. STOPPING PROCEDURES ···.·····..·· 10
5. CAUTIONS ON STARTING
AND OPERATION ···..····.········· 10
6. REQUIREMENTS FOR PROPER
6-1 Lubrication System ·.·...··· 12
6-2 Fuel System ··....·...···.·· 13
6-3 Cooling Systern .··..···.···· 15
6-4 Wiring diagrarn ··.·····.···· 1S
7. RECOMMENDED MAINTENANCE SERVICE.19
S. TRANSMISSIONS ····.··..··.······. 22
9. TROUBLESHOOTING ··········.······ 23
10. SERVICE DATA ··········.....··.·· 25
11. TABLE OF TIGHTENING TORQUES ····· 26
ITEM CHARACTERISTIC W13 W2l W27 W33
Type Vert.,4 cycle,water cooled diesel en~ine
Combustion chamber Swirl chamber type
:z No. of cylinders 2 3 4 4
:Z~ Bore & stroke (inches) 2.76x3.07 2.87x3.07 2.87x3.07 3.07x3.07
ZI%.l Cu. In. displacement 37 60 80 91
~ Compression ratio 23 23 23 23
Firing order 1-2 1-3-2 1-3-4-2 1-3-4-2
Dry weight, std. (lbs) 298 374 434 498
Fuel #2 diesel fuel only
::1!! Injection pump Bosch type
DCIl Nozzle Throttling type
Injection pressure All models: 1707 lbs.
Governor Centrifugal weight type
H Lubrication system Pressure lubrication
C.JE-! Oil filter Filterp~Qer type
Engine oil capacity 2.5 qts I
4.0 qts I
4.0 qts 4.2 qts I
For accuracy, depend on dipstick markings
~ ::E:jcooling system Forced circulation, water cooling by
8 ~!Coolant capacity 6 qts I
5 qts I
8 qts 8 qts
Always fill to top of filler neck
....:t Starter V-HP 12-2 12-2 12-2 12-2
t:X:E-! Alternator V-A 12-50 12-50 12-50 12-50
rx:ICIl Glow plug Sheathed trpe - all models
lBattery capacity 60 AH 75 AH 90 AH 90 AH
CAUTIONS IN HANDLING ENGINE
* Always use proper engine oil and watch oil pressure during opera-
* Use clean fuel, free from impurities and water content.
* Prevent entry of air and water into the fuel system.
* In case the starter motor pinion fails to engage wi th the ring
gear at the time of starting, turn on the starter swi tch again
after the starter motor has come to a complete stop.
* Prevent the temperature of cooling water from falling too low.
* Pay attention to the color of exhaust gas.
* Clean or replace the fuel filter and oil filter periodically.
* Replenish or replace oil as specified.
* Never put the engine in o~eration in improperly ventilated places.
* Do not touch moving parts during operation.
* Do not touch hot parts such as exhaust pipe, and do not place com-
bustible materials there.
* Inspect and adjust parts of the engine only after it is stopped.
* Check and refill engine oil, cooling water and fuel after the
engine is brought to a stop.
* In checking the level of and refilling cooling water, remove thie
pressure cap after the temperature of the water has fallen enough.
* Always use tools of proper sizes and full caution during sel
Service life of your engine is dependent upon how your engine is
operated and serviced during the initial 50 hours of operation!
Your new engine needs 50 hours
of conditioning operation for
breaking each moving part in
and maximizing performance and
life of engine. Perform this
conditioning carefully, bearing
the following points in mind:
* Idle and warm up your engine from 3 to 5 minutes.
* Avoid hasty acceleration.
* Use caution not to overload the engine.
* Inspect, maintain and service your engine in accordance wi th the
instructions in this manual.
"Breaking in" a new engine is basically a seating of the piston rings
to the cylinder walls. This is not accomplished by long periods of
running idle, nor by early running under full load, nor by varying
loads with intervals of fast acceleration and/or excessive speed.
Idle running may glaze the cylinder walls causing oil consumption and
smoky operation. Excessive speeds and loads may score cylinder walls
with similar results.
As indicated above, use a short warm up at idle and put engine under
moderate load and speed for the first ten hours of operation. For
the next forty hours, use approximately 70% load. This kind of care-
ful operation will result in best results from your engine.
Take steps as shown below in starting your engine for the first time
or after a prolonged shut-down.
1. Fill your engine with oil up to
or near the upper limit on the
dipstick. Use a good grade of
oil wi th API specification of
CC or better. For quantity of
oil, you may refer to the
General Specifications page.
However, it is best always to
be guided by dipstick measure-
ment as angle of installation
has some effect.
2. Your eng ine is suppl ied wi th a ...
coolant recovery system to
which the following instruc- ot1levelgatJge_~"'f1
a) Fill engine completely to
the neck of the manifold cap.
b) Then fill the recovery
tank to the bottom level line.
Need for adding coolant is
indicated when a cold engine
has coolant level below the
bottom level line.
c) In winter add antifreeze
as described on page 16. Anti-
freeze may be used year round
if changed annually.
3. Fill the fuel tank with Diesel
fuel. The interior of the fuel
tank must be maintained clean.
Be careful not to allow intro-
duction of dirt when filling
4. Engine oil, coolant and
transmission levels should be
checked at least once a day
prior to engine use.
Instrument panel, description and use of:
Note 1: When engine is stopped after use, the water temperature and
oil pressure gauges may stay at their running readings.
Note 2: When engine is next to be used, turn start switch to "ON".
The temperature and pressure gauges will "ZERO" and the volt-
meter will register battery voltage. The electric fuel pump,
mounted on the engine, will also begin to operate, purging
any air accumulated in the system.
Note 3: The engine is now prepared for starting.
1_ Turn the starter swi tch to the
"ON" position_ If making an
ini tial star t after lay-up,
fuel filter servicing or
repairs, allow fuel pump to
work 15-25 seconds to purge the
system of any air. Check that
clutch is in neutral and that
throttle is in full forward_
2_ Glow plug preheating
with key in "ON" position, push
in about 1/4 inch or enough so
that voltmeter indicates dis-
charge. Hold key in depressed
posi tion until glow plugs are
sufficiently hot_ Follow Table
below for preheating time.
Quick-heat type (Yl14T)
Atmospheric temperature Preheating time
+s·c (+4l·F) or higher Approx. 10 sec_
+S·C (+4l-F) to -S-C (+23-F) A~rox. 20 sec.
-SoC (+23·F) or lower Approx 30 sec.
Limit of continuous use 1 minute
3. Proper glow plug function is
indicated by voltmeter drop
when key is depressed. This
drop will be slight but dis-
cernible. If no voltage drop
is noted, it may indicate
defective glow plugs or a
faulty preheat circuit (check
for loose connection).
Continuing to hold the key
depressed, turn to the "START"
position. The starter motor
will run ther eby cr ank ing the
engine. Hold throttle open
until engine runs and then
Should the eng ine not star t even when the star ter swi tch is left at
"5" position for 10 seconds, take your hand off the starter switch for
30 seconds, and then attempt to start the engine again by sufficiently
preheating the glow plug. The starter motor should never be allowed
to run for more than 30 seconds at a time.
As soon as the engine has
started, release the key. The
key will automatically return
to the "ON" position. Leave
the key at "ON" dur ing oper a-
tion. Check that with engine
running, oil pressure and bat-
tery charge voltage are
registering and that raw water
is discharging with the
During engine operation, do not turn the key to "5 11 position. This
may damage the starter motor.
6. Warm-up operation
Run a few minutes at II IDLE"
position to assure that all
functions are operating. Then
operate under reduced load
until water temperature rises
into the 140-150· range.
To stop the engine move the
throttle control through the
idle position to stop. As the
throttle is moved past idle
there will be increased
resistance to movement because
a spring loading must be over-
come. Hold the throttle firmly
against the pressure until the W-13 W21,27,33
engine comes to a complete
2. Starter switch off
Wi th the eng ine stopped, turn
the star ter key back to "OFF"
position. The battery will be
discharged if the key is left
at "ON" position. An engine
alarm buzzer is provided to
warn the operator of this
possibili ty. Best precaution
is always to remove the key.
CAUTIONS ON STARTING AND OPERATION
1. Normal starting
Follow the procedures below for routine starting of your engine.
1) Check the engine and transmission oil levels and refill if
2) Insure that you have sufficient fuel. Keep tank as full as
3) Check coo~ng water level, and refill if necessary.
Note: Check for leaks of water or oil, particularly when
signs of such leak are found on the bottom of the engine or
in the drip tray.
4) Start the engine in accordance with the procedures given on
the preceding pages.
5) Allow the engine to warm up to 140·-150· F before placing the
engine under heavy load.
2. Starting under cold conditions
The following three adverse condi tions concur as the atmospher ic
temper a-ture drops exceedingly, and the engine must, under such
conditions, be started by taking steps described below:
LUBRICATING OIL TURNS VISCOUS Make certain that oil used
is adequate for the prevailing atmospheric temperature.
Check the oil also for deterioration.
VOLTAGE ACROSS BATTERY TERMINALS DROPS Check that the
battery is fully charged.
THE TEMPERATURE OF INTAKE AIR IS LOW AND COMPRESSION
TEMPERATURE DOES NOT RISE ENOUGH Allow the glow plug to
operate sufficiently to aid starting. See table on page 8.
3. Cautions during operation
Confirm that the oil pressure is normal during normal operation.
Confirm that exhaust gas is as follows:
* While engine is cold ·····.··········.···· White smoke
* When the engine grows warm .·..···.......· Almost smokeless
* When the engine is overloaded ············ Some black smoke
Check for abnormal noise such as knocking, fr iction or leaking
sounds, and vibration and blow-back sounds.
Check for leaks of fuel and engine oil.
A knocking sound is heard while the engine is cold, during quick
acceleration and at idle. Confirm that no knocking sound is heard
in other cases.
LEFT SIDE} W-33 WITH 2:1 VEE DRIVE
REQUIREMENTS FOR PROPER OPERATION
1. Engine oil
For engine lubrication, use diesel engine oil. Diesel engine oils
are classified according to the API Specifications into grades CA,
CB, CC and CD. Anyone of them is usable, but use of CC or higher
grades prepared by well-known makers is recommended.
2. Engine oil viscosity
Use oil having viscosity best suited to the atmospheric tem-
perature. Use of an all-season oil SAEIOW-30 with minimum visco-
sity change under different temperatures is suggested.
Atmospheric temperature Viscosity
20·C (6a·F) or higher SAE 30 or lOW-30
SAE 20 or 10W-30
S·C (41·F) or lower SAE 10W-30
3. Oil pressure
The oil pressure dur ing operation of the engine is indicated by
the oil pressure gauge.
During normal operation ············ Oil pressure will range between
50 and 70 PSI.
At the time of cranking ············ Pressure will rise proportion-
ately with speed.
4. Engine oil change
To renew engine oil, discharge old oil through the sump drain hose
attached at front of engine while engine is still warm.
Drain old oil completely, replace the hose, plug the end securely
and add fresh oil through the oil inlet port on the valve cover.
After refilling oil, idle the engine for several minutes and stop.
Then check the quanti ty of oil by the oil level gauge. F ill to
but not over the high mark on the dipstick.
5. Replacement of oil filter
Being a replaceable cartridge
type, the oil filter requires
no cleaning inside.
In installing the oil filter,
apply engine oil thinly on to
the O-ring, and then tighten it
by hand firmly.
When removing the used filter,
cover over with a plastic bag.
This will allow both filter
element and spilled oil to be
collected cleanly without
spilling oil in the bilge.
Note A: After market filters are not recommended since the
material standard or diameters of important items might
be entirely different from genuine parts.
Note B: Immediately after filter change and oil fill, run engine
to ensure that oil pressure is normal and that there are
no oil leaks.
1. Diesel fuel
USE #2 DIESEL FUEL. NEVER USE KEROSENE OR HEAVY OIL.
In cold weather, particularly, much water vapor is produced when
much air is present in the fuel tank. The tank, therefore, should
be kept full as much as possible.
The fuel tank, furthermore, needs to be kept completely free of
dirt and water.
2. To this end, it is most
desirable that a primary fuel
filter of the water entrapment
type be installed between the
fuel tank and engine. Such a
filter is available under part
# 32974. (See your local
Water entrapment filter #32974
is shown opposite. Inspect
frequently for presence of
water in the clear bowl. Drain
it off by loosening the air
vent and opening the drain.
3. Notes on fuel system
See below a typical exploded view of a fuel system. The one shown
is for the W13. Those for the W21, W27 and W33 are similar except
for the number of cylinders.
The Wes·terbeke self-bleeding fuel system is automatic in opera-
tion. Therefore, it is unlikely that the operator will be forced
to service the system at sea.
For. that unlikely possibility, however, it is recommended that the
following parts be carried onboard.
Banjo washers 11, 30, 31, 33, 34, 45
Injector seat washers 42
Lift pump filter and gaskets 6, 7, 8
Fuel filter element and gaskets 13, 14 ,15
If a leak should develop at a banjo or washer that cannot be
remedied by a simple tightening of the screw, renew the washers.
The engine can be started by taking the steps described on pages 8
and 9. In cases where the engine cannot be started easily, loosen
two injection nuts on the nozzle side, turn the speed control
lever to "full open" position, turn the starter motor and then
tighten the nuts firmly.
4. Cleaning fuel filter and replacing filter element
After the first 50 hours of operation, loosen the retainer ring
#16 and discard filter element #15. Clean bowl #17 and re-install
new filter, using new gasket #13 and #14.
This same treatment is required of the filter element #6 in the
fuel lift pump. Similarly, replace n.ew filter element #6 using
new gasket #7 and #8.
After the first 50 hour change, the change period may be increased
to 200 hours or once per season.
5. Fuel injection pump
The fuel injection pump is one of the most important components of
the diesel engine and thus it calls for the utmost caution in
handling. Furthermore, the fuel injection pump has been
thoroughly shop-adjusted and should never be readjusted care-
Such adjustment, whenever necessary, should be performed at an
author i zed service station as a precision pump tester and skills
To obtain long and satisfactory use of your injection pump:
Always use fuel which is free from impurities.
Clean and renew the fuel filter periodically.
Inspect water entrapment filter regularly.
1. Cooling water
As cooling water, use soft water with least impurity content such
as tap water (potable water) or rainwater, and never use hard
water or foul water. Use of hard water or water containing much
impurity will lead to collection of scale in the engine and heat
exchanger with resultant decline in cooling effects.
In cold districts, care should be takeri to prevent cooling water
from freezing. Cooling water when frozen expands to break the
heat exchanger and the cylinder block, and it is essential that
antifreeze be added to cooling water in a quantity being propor-
tional to the lowest temperature of the d~str ict. It is recom-
mended that the antifreeze mixture be used throughout the year.
*Antifreeze of poor quality will cause corrosion of the
cooling system, and thus always use antifreeze prepared by a
reliable maker, and never use it mixed with antifreeze of a
*Make sure that the cooling system of the engine is cleaned
well before adding antifreeze.
*Recommended antifreeze for year round use is ZEREX Long Life
Coolant (antirust contained).
ANTIFREEZE ADDITION DATA
Concentration % 13 23 30 35 45 50 60
Freezing ·C -5 -1" -IS -20 -30 -40 -50
temperature ( · F) (23) (14) (5) (-4) (-22) (-40) (-58)
Note: It is advisable that antifreeze concentration be
selected on the basis of a temperature which is about
5·C (lO·F) lower than the actual atmospheric tem-
3. Alternator belt tension
The alternator belt is properly
tense if it deflects 10 to
12 mm (0.39 to 0.47 in) as it
is depressed with a finger be-
tween the pulley and pulley of
the long distance side.
Excess i ve tens ion can cause
quick wear of the belt and
bearings of the water pump and
the alternator. Excessive
slackness or presence of oil on
the belt, on the other hand,
can lead to engine overheating
and insufficient charging due
to a slipping belt.
Never attempt to adjust tension of the fan belt while the
engine is in operation.
4. Fresh water cooling system (See Note 5 on page 6.)
The system consists of a sea water pump which pumps raw sea water
through a heat exchanger to remove heat from the coolant. The raw
water is discharged overboard through the exhaust line.
The engine coolant (fresh water with or without antifreeze) is
circulated by the fresh water pump in continuous circuit. Pumped
through the cylinder block, cylinder head, heat exchanger and back
to the fresh water pump.
The total system is very reliable and requires only a daily check
of the water level in the system plus routine check of hose clamps
It is likely that zinc electrodes will waste away from contact
wi th sea water. It is also possible for the raw water pump
impeller to fail due to lack of sea water or deterioration. An
early sign of impeller failure is less water and more steam at the
exhaust through hull fitting.
I t is recommended, therefore, that zinc electrodes, an impeller
kit, a pump belt and a thermostat with gasket be kept onboard at
all times. These parts should be ordered from your nearest
stocking dealer and used as inspection dictates.
Your engine is of l2V system and its electric circuit is as shown in
the diagram below.
For installing electrical parts, connect them correctly by referring
to the diagram and at the same time check for damaged wire sheathing
and confirm that grounding is provided properly. Care must always be
taken while working on the electrica~ system.
Never shut the engine battery switch off while the engine is running.
Damage to the alternator will result should this be done ·
+ IZVDe fI ...i'T'f,. ...
STo\RT 500L ST~A:rtA ®
WIP: NG DIAGRAM ',. @ OUTPUT
~:ioU NOTE- ~ CIoQ£ ... !:.l'" SoO\..
W.T.~cNOER &IHI .RH
'------+--I--...5°~·'~ ______!___1- _ --
RECOMMENDED MAINTENANCE SERVICE
Check and service your engine at specified intervals to maintain it in
its best conditions and permit it to perform as it should. As for
those asterisked items, it is suggested that you have them performed
by an authorized distributor or dealer.
1. Daily inspection before use
A. Checkup of engine oil level and refilling
No refill is required if the level is near the upper limit
line of the gauge.
B. Checkup of cooling water and refilling
Refill up to the filler cap neck.
C. Check your fuel supply
D. Checkup of gauges and meters
After starting your eng ine, check oil pressure, water tem-
perature and voltage reading.
E. Checkup for loose parts (fan belt or bolt, etc.), damage and
F. Checkup for abnormality with exhaust gas, noise and vibration
2. Servicing following initial 50 hours of operation
A. Renewal of engine oil
B. Replacement of oil filter
C. Renewal of cooling water
D. Adjustment of valve clearance (See SERVICE DATA)
*E. Tightening of bolts and nuts
*F. Adjustment of engine idle
3. Servicing at every 100 hours of operation
A. Renewal of engine oil
B. Replacement of oil filter
C. Cleaning of fuel filter
D. Adjustment of engine idle
4. Servicing at every 200 hours of operation
A. Replacement of engine mounted fuel filter elements
B. Replacement of fuel filter (cartridge type)
5. Servicing at every 400 hours of operation
A. Cleaning of fuel tank
*B. Adjustment of valve clearance
*C. Checkup of starter motor, alternator and regulator
Check the brush and surface of commutator for the degree of
wear. Replace the brush if it is worn beyond the limits of
*D. Checkup of glow plugs
Check the glow plugs for blow-out.
E. Removal of cooling water and flushing is suggested.
6. Servicing at every 800 hours of operation
*A. Checkup of nozzles
Set the injection starting
pressure to 1707 -0 psi
and eliminate undesirable
injection conditions in-
cluding "after dr ipping".
*B. Checkup of compression pressure
Remove each glow plug and check cylinders, one by one, using
a compression pressure gauge. If the pressure differs by
more than 2.5 kg/cm 2 (35.6 psi) between cylinders or if the
cylinder pressure is less than 26 kg/cm 2 (369.8 psi) at
320 RPM for the W13 and at 280 RPM for the W21, W27 and W33,
*C. Fuel injection adjustment
In case of severe vibration during idling, have it repaired
at an authorized distributor or dealer which is equipped with
a pump tester.
*D. Checkup of alternator and regulator
Regulate the voltage and current by use of a circuit tester.
*E. Checkup of starter motor pinion and flywheel ring gear
Rectify the chamfered area that has been severely damaged by
use of an oil stone or some pencil grinder, and replace the
part if it is damaged allover.
*F. Tightening of bolts and nuts
RIGHT FRONT QUARTER 1 W-21 WITH 2:1 REDUCTION GEAR
Each engine model may be fitted with a variety of transmission
options. For ratio and/or type, see table below.
Model 1:1 1.5:1 2:1 2.5:1 2:1
W13 S-lOOO HBW-100 HBW-50 HBW-50 HBW150V
W21 S-lOOO HBW-100 HBW-50 HBW-100 HBW150V
RD-60 S-lOOO HBW-100 HBW-50 HBW-100 HBW150V
W27 S-lOOO HBW-100 HBW-100 HBW-150 HBW150V
RD-80 S-lOOO HBW-100 HBW-100 HBW-150 HBW150V
W33 S-lOOO HBW-100 HBW-100 HBW-150 HBW150V
Rotation Hand --------------Right Hand----------------
These transmissions have their own oil sumps and dipsticks. "s" and
"HBW" units use ATF lubricant, while "BW" units may use either ATF or
30 weight engine oil.
The transmissions, their dipsticks and markings are illustrated in the
sketches below. For dipsticks that are threaded in the case, measure
oil by dropping dipstick on the case. Do not screw in.
1. ENGINE DOES NOT START
a. Starting switch is defective Correct connections and contacts
b. Deficient drive torque .)f The battery is exhausted, trouble
the starter motor with the starter motor, or dirty or
c. Improper viscosity of engine Check the viscosity and renew oil
oil if necessary
d. Engine too cold Use glowplug starting aid
e. Seizure of moving parts Rectify
f. Air present in fuel system Purge thoroughly with electric fuel
g. No fuel in fuel tank Refill
h. Fuel filter clogged Clean or renew
2. ENGINE STALLS WHILE IN OPERATION
a. Fuel tank is empty Refill
b. Fuel filter clogged Clean or renew
c. Air present in fuel system Retighten fuel line connections to
allow electric fuel pump to run long
enough to purge air thoroughly
3. IMPROPER OIL PRESSURE
a. Oil shortage Refill
b. Oil leak through connections Repair
c. Oil pressure switch Replace
4. ENGINE OVERHEATING
a. Cooling water shortage Refill
b. Water leaks Repair
c. Belt loose or smeared with Clean or renew
d. Raw water QumQ defective ReQair or renew
5. BATTERY IS UNDERCHARGED
a. Belt tension improper Rectify
b. Faulty wiring circuit Rectify
c. Alternator not functioning Replace
d. Battery faulty Replace
e. Faulty voltage reg~u~l~a~t~o~r~__~~R~eQair or renew
RIGHT SIDE) W-27 WITH 2:1 VEE DRIVE
1. Valve clearance (engine cold) 0.25 rom (0.010 in.)
(both intake and exhaust)
2. Compression pressure
W13 32 kg/cm 2 at 320 RPM
W21 - W27 - W33 32 kg/cm 2 at 280 RPM
3. Engine oil capacity (including
W13 2.8 liters (0.74 U S gal)
W21 3.5 liters (0.93 U S gal)
W27 4.5 liters (1.19 U S gal)
W33 5.0 liters (1.32 U S gal)
4. Firing order
W27 - W33 1-3-4-2
5. Injection timing - BTDC of compression stroke when started at
smoke set position.
Marine Engine 23· + 1.5·
19· + 1.5·
6. Injection starting pressure +142
1707 0 psi
7. Cooling water capacity (in engine
W13 2.1 liters (0.56 U S gal)
W21 3.0 liters (0.79 U S gal)
W27 3.5 liters (0.92 U S gal)
W33 3.7 liters (0.98 U S gal)
TABLE OF TIGHTENING TORQUES
Cylinder head bolt (MI0) W21, W27, W33 7-8 SO.7-S7.9
(M12) W21 11-12 79.6-86.8
W13, W27 12-13 86.8-94.0
(M14) W33 lS-16 108.S-11S.7
Crank pulley nut W13 lS-20 108.5-144.6
W21, W27, W33 20-25 108.S-180.8
Main bearing cap bolt W21, W27, W33 S.O-S.S 36.2-43.4
Connecting rod cap nut W13, W21, W27 3.2-3.S 23.1-2S.3
Connecting rod cap bolt W33 11.S-12.S 83.2-90.4
Flywheel bolt 11.S-12.5 83.2-90.4
Oil pan drain plug S-6 36.2-43.4
Oil filter 1.1-1.3 8.0-9.4
Delivery valve holder (injection pump) 4-S 28.9-36.2
Holder mounting bolt, nozzle 1.S-2.0 10.8-14.S
Holder body and retaining nut, nozzle 6-8 43.4-S7.9
Glow plug 1.S-2.0 10.8-14.S
General screw tightening torque M6 0.7 5.1
M8 1.7 12.3
MI0 3.S 25.3
M12 6.4 46.3
M14 9.S 68.7
WESTERBEKE GENUINE PARTS
"WESTERBEKE GENUINE PARTS II are super ior and
reliable because they have been produced under an
excellent quali ty control system and have passed
the standard after strict inspection.
After market parts are not recommended from
the viewpoint of their material standard and manu-
facturing method which may be entirely different
from those of genuine parts.
"WESTERBEKE GENUINE PARTS II are available from
our authorized distributors and dealers. Please
order your spare parts from your nearest distribu-
tor or dealer.
LEFT SIDE) W-13 WITH 2:1 BW-3 TRANSMISSION