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S
ECTION
•
The pattern will not be complete, but it should
show a consistent transfer over at least 80
percent of the contact area.
•
If the propeller bore shows an area, with little
or no transfer, remove the key from the shaft
and apply some lapping compound to the
shaft.
Step 4: Set the propeller on the
taper with the nut set loosely.
Rotate the propeller in 60 - 90
degree increments first clockwise,
then counterclockwise.
•
The propeller will begin to bind as the
compound is worked out from between the
shaft and propeller. At this stage, clean the
shaft taper and propeller bore and repeat
the above steps until a transfer showing 80
percent contact is made.
Step 5: Final Installation - apply a light coat of Never
Seize
®
to the shaft taper.
•
Set the propeller on the shaft with the key
ensuring that the propeller is in full contact
and in the proper position on the taper.
•
If the propeller is not fitted with a Propsmith
or equivalent, the propeller nut should be
used to drive the propeller up the taper.
•
Document right hand and left hand prop
make/ model installation on the Maintenance
Log (Section 8, page 8.15).
Step 6: Install the small propeller
nut. Use the slugging wrench
making small, but numerous hits
on the wrench until the propeller
is driven up the taper one quarter
(1/4) turn after the nut contacts
the propeller.
NOTICE
If the jam nut and prop nut are installed properly,
the propeller should not loosen. If you tighten both
nuts holding only the propeller blade, the nuts
could possibly thread back on the shaft to the
cotter pin. It is important that the above procedure
4.10
4 • B
& U
ILGE
®
https://www.boat-manuals.com/
NDERWATER
Shaft
Thread
Prop
Diameter
Size
Nut
1"
3/4"
Bronze
1 1/4"
7/8"
Bronze
1 1/2"
1 1/8"
Bronze
1 3/4"
1 1/4"
Bronze
2"
1 1/2"
Bronze
2 1/2"
1 3/4"
Bronze
Step 7: Remove the slugger wrench, install the
larger nut and tighten one sixth (1/6) turn after nut
contacts the small propeller nut, using the slugger
wrench and mallet.
•
Install the cotter pin and
bend each side180
NOTE: Do not use the propeller blades as stops
by wedging blocks of wood between the blade and
the hull of the boat.
NOTE: The propeller hub may be heated to ease
the removal process using a non-oxidizing gas such
as propane. The hub should not be heated beyond
approximately 150 degrees F.
B. S
HAFTS
The shaft coupling is the connecting point
between the shaft and the transmission/engine
(Figure 4.11.1). The alignment should be set at
a maximum of .005" (0.13 mm). A slight
misalignment will cause loss of power, excessive
wear, noise and vibration and should not be
tolerated. When checking for parallel coupling
faces (the proof of proper alignment), use a feeler
gauge not more than .003 to .005 of an inch thick
(0.08 – 0.13 mm).
With coupling faces brought together by hand –
not bolted – the feeler gauge should be tightly
gripped at all points around the edges of the
couplings. Next, hold the engine coupling flange
58 Sedan Bridge (585 Sedan Bridge)
G
EAR
Jam Nut
Torque
Torque
Ft. Lbs.
Ft. Lbs.
100-125
100
150-175
100
250-275
100
275-300
100
325-350
100
400-425
100
o
.
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