Saturday, July21, 2018

Pyi Max Prop 3 Blade Instructions

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1 INTRODUCTION Thank you for having chosen a MaxProp
feathering propeller for your vessel This instruction booklet is designed to
answer all your questions on assembly of the MaxProp Please read it
carefully and assemble the propeller at least once before installing it on your
Automatic Feathering Propeller 2 PITCH ADJUSTMENT This is a critical step make sure that you know
what pitch to set the propeller at either by your old propeller or by your
engine and reduction ratio
The pitch is adjustable from 10 to 30 degrees of blade angle
Figure 1 shows the conversion from inches of pitch to degrees of blade
Instructions To properly convert from inches to degrees follow steps A thru C
A Determine the diameter of your propeller
B Go down the column that corresponds to your propeller diameter until
THREE BLADE CLASSIC you find the desired amount of pitch
C Cross reference this pitch in inches to the blade setting angle directly
across the chart and you will have the desired blade angle
Propeller Diameter in inches
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
10 deg 4 43 46 49 52 55 6 63 67 71 74 77 8 83 86
12 deg 48 52 56 6 64 68 72 76 8 84 88 92 96 10 104
MaxProp Blade Setting Angle
14 deg 56 6 66 71 76 8 84 88 94 98 104 108 112 116 122
16 deg 64 69 76 81 86 91 98 103 108 113 12 125 13 135 14
18 deg 72 78 86 92 98 104 11 115 121 128 134 14 146 152 16
20 deg 82 89 96 103 11 116 124 13 137 145 15 156 164 17 178
22 deg 92 10 107 114 122 129 136 143 151 16 168 175 182 189 198
24 deg 10 109 118 125 134 142 15 158 168 176 184 192 202 21 218
26 deg 11 12 128 138 147 157 166 174 184 193 202 21 22 229 238
28 deg 12 13 14 15 16 17 18 189 20 21 22 23 24 25 26
30 deg 13 14 151 162 173 185 196 206 217 228 24 25 261 273 282
Pitch in inches
12532 Beverly Park Rd Maxprop offers the great advantage of pitch adjustability in order to optimize the
performance of the propeller If the propeller does not reach the desired RPM
Lynnwood WA 98087 reduce the blade angle If on the contrary the engine exceeds the desired RPM
Office 425 3553669 increase the blade angle A two degrees change in blade angle will change the
engine RPM by 1315 at the same boat speed The adjustment of angle and
Fax 425 3553661 therefore of pitch is done when the propeller is mounted on the shaft To obtain
Email the different values of angle you have to follow the assembly 3
ASSEMBLY Make sure that if you receive more than one propeller that do 2 No Drill Nut Tighten the nut 4 onto the shaftAlign the groves in
the base of
not interchange parts Each propeller is individually balanced and if the nut with the groves in the central hub so as to obtain two
complete holes
interchanged it will be put out of balance Please use figure 2 in the allowing insertion of the pins 5 Insert the pins then rotate
the pins are as
instruction book for part number references shown in the drawing below so as not to interfere with the
inserting of the
central cone gear see figure below
yes no
One thread can be exposed aft of either nut system if more than that are
showing it will be necessary to cut off the excess with a hack saw If too many
threads are exposed it will raise the central cone gear 6 and effect the
performance of the propeller
C On the bottom of the central gear 6 there is a groove on the bottom of one
of the teeth this represents the X on the chart in figure 3 Place the tooth
with the groove into the corresponding lettered gear on the hub 1
30 H
Right Rotation
Fig2 28 D
26 V
24 S
A Fit the hub 1 to the propeller shaft 2 Be sure that the key 3 is the proper
dimension and that the hub slides completely onto the shaft If you are not
sure remove the key and slide the hub onto the shaft making a mark on the
x 22
shaft where the hub stops on the shaft Reinsert the key and slide the hub
16 C
14 T
on to the shaft if it slides up to your mark it is fine If not you will need to ABCDEHKLNPSTV
12 P
file down the sides or top of the key until the hub slides completely onto the
10 L
0 K
10 H
Left Rotation
B Two types of nuts are available in the Maxprop
12 D
14 B
16 S
1 Drilled Nut Tighten the nut 4 onto the shaft and secure it with the
18 N
pin by drilling a hole completely through the nut and shaft a cobalt
20 K
drill bit makes this task easier
22 E
24 C
26 A
Fig3 28 P
30 L
D Fill the two halves of the spinner 7 with a sea water grease From our
experience Lubraplate 130 AA grease has worked best Close the two
halves around the hub and tighten down the screws
NOTE DO NOT USE TEFLON GREASE it will wash out very quickly
E Locate the mark on the top inside of the spinner a small drill hole This is F Insert the three blades onto the three pins of the spacer
10 Fill the end
the Y mark in figure 2 Rotate the spinner until the Y mark on the spinner cap 11 with grease and put the blades into the three seats of
the end cap
coincides with the correct letter on the top of the central cone gear This letter
is determined from the chart in figure 4 Fill the top of the spinner with
30 H
Right Rotation
28 K
26 B
24 C
22 D
20 E
18 H
16 K
14 B NOTE Make sure that the numbers on the blades correspond to the
12 C numbers in the spacer and the numbers on the end cap 1 to 1 2 to 2
10 D and 3 to 3
0 D
10 D G Move the blades to a feathered position making sure that the rounded
Left Rotation
12 E trailing edges of blades are aft as shown in figure 6 Slide the end cap and
HED 14 H feathered blades on to the spinner make sure that the numbers on the
16 A
blades and spinner match Next tighten down the end cap with the screws
18 B
20 C NOTE Check to see that the spinner did not rotate If it did move pull the
22 D
blades back 14 and then realign the mark between the spinner and the
24 E
hub Make sure that when the blades go on to the spinner that they are fully
26 H
Fig4 28 A feathered
30 B
H To make the blades rotate more freely it is advisable after tightening all the
screws to give some bedding blows on the spinner and blades with a plastic
NOTE It is helpful to make a mark between the spinner and exposed part of or wooden mallet
the hub or tape them so that any rotation can be noted and corrected If the
spinner is rotated before the blades are attached it will alter the blade angle I To make sure that the screws will not loosen insert a
116 stainless steel
cotter pin into the head of each screw Put them on so that if the screw were
to loosen it would hit the cotter pin as shown in figure 5 Cut the cotter pins
to a length of 14 and put them in A tight tap with a hammer on the head of
the pin will spread the ends open if not use a screw driver to spread them
no yes Make sure that the propeller is protected from galvanic corrosion by using On
the contrary if the blades rotation is hard remove 001 mm from
zinc anodes on the propeller shaft and on the end cap of the propeller If the surfaces B of the spacer using emery cloth wrapped around a
propeller has been assembled properly file Try until both hub and blades rotate freely
The blades must rotate freely and stop at the blade angle you selected
In the feathered position the blades must line up perfectly as in figure 6 2 Again mount the central cone gear 6 and reassemble the
propeller If
The propeller must never rotate as shown in figure 7 the propeller rotation still has some hard points remove 01 mm
with a
flat file from surface C so that central cone gear sits lower and the
clearance between conical gears increases
5 PROPELLER USE The Maxprop works By putting the engine
in gear the blades will engage in either forward or reverse The best way to
feather the propeller is
Power at 2 to 3 knots in forward
Kill the engine while still engaged in forward
Fig6 Fig7 When the engine has stopped if the shaft is still spinning engage the
transmission in reverse to stop the yes no You can check to see if
the propeller is feathered or not by taking the engine
out of gear If the propeller is not feathered the shaft will freewheel like with a
4 TROUBLE SHOOTING If the propeller feels stiff or has a hard spot in the fixed blade propeller
rotation go through the points below
In that case start the engine again and repeat the three steps If your
A If the propeller does not rotate freely remove some of the grease from propeller has been greased properly it will feather in a fraction
of a second as
the spinner and reassemble soon as you stop the shaft from freewheeling Once the prop is feathered
you can either leave the transmission in gear or out of gear it does not
B Sometimes it can happen that a small piece of metal or burr enters matter DO NOT kill the engine while in reverse In this case the
blades will
among the gears or a piece of the propeller has been dinged in this be in the reverse position and will not feather You can actually use
case the blade movement can become hard It is necessary then to do feature to drive a shaft alternator
as follows referring to figure 8
6 PROPELLER MAINTENANCE The Maxprop needs to be regreased a
minimum of once every two yearsWe recommend Lubraplate 130 AA
B grease
There are two holes in the spinner of the propeller to grease Remove the
set screw from the forward holes with a 3 metric Allen wrench and screw
in the zerc tower attach your grease gun and fill the propeller with grease
until the grease starts to come out between the hub 1 and the spinner 7
Replace the set screw and remove the set screw from the more aft hole
C Reinstall the zerc tower and attach your grease gun and fill the propeller with
grease until the grease starts to come out between the blades and the
spinners Remove the zerc tower and reinsert the set screw into the
6 propeller Do not leave the zerc tower in the propeller
1 Open the propeller and assemble it again after having taken the
central cone gear 6 out so that the blade and the hub rotation are
independent If the hub rotation is hard remove 001 mm from
surfaces A with an emery cloth
With each pump of the grease gun rotate the propeller from forward to reverse
to allow the grease to work through the propeller
The numbers above are from Figure 2 at the beginning of this Maxprop Manual
Make sure that you always keep the zinc anodes in good condition They
must be replaced at least once a year The propeller must be protected by a lot Automatic Feathering Propeller
of zinc so also use a zinc on the shaft when possible When replacing it make
sure that you clean the contact point between the zinc and propeller Use a
wire brush or fine sandpaper to clean the aft of the end cap and the forward
face of the zinc to give the zinc good contact with the PROPELLER REMOVAL In order to remove the propeller you must first
Installation Instructions
remove the spinner and nut Be sure only to pull from outside the hub figure
9 If the surfaces on the hub are hit or dinged it can effect the performance of
the propeller
no Fig9 yes
8 WARNING It is important to follow the instruction below carefully so as to
avoid a shock to the gears on the blades and cone gear that could be
damaging to the teeth
1 When going from forward to reverse and the opposite it is necessary to
idle down and shift at low RPMs between gears
2 The propeller body must always be completely filled with a very fluid
grease This is so when you reverse direction the rotation will be smooth
with no binding Binding points will produce a shock and could damage 12532 Beverly Park Rd
the gears Lynnwood WA 98087
Office 425 3553669
Fax 425 3553661

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