Pinion Gear/Reverse Gear
Check the amount of backlash between the pinion
gear and forward gear.
Install the propeller shaft, reverse gear, and bear-
ing housing
assembly. Tighten retaining screws to
72 in.
Ibs.
(8
N·m).
Check
the amount
of
backlash by slightly rotating
the driveshaft by hand.
Backlash should not be less than between the pin-
ion and forward gears.
If backlash is less, reduce reverse gear back-up
shim thickness.
GEARCASE
SHIMMING ADJUSTMENTS
Propeller Shaft Thrust Play
After adjusting all gear positions, measure the
propeller shaft play. If not within the following val-
ues, make a shim adjustment:
• Propeller shaft thrust play: 0.008 to 0.016
in
.
(0.2 to
0.4 mm)
IMPORTANT: Maintain the forward gear thrust
washer at standard thickness (1.5 mm) and adjust
only the reverse gear thrust washer.
Assemble a Dial Indicator to the propeller shaft.
004412
Push propeller inward.
Hold shaft
in
and set dial gauge pointer to zero .
Slowly pull shaft outward and read the maximum
thrust
play on the dial.
• If play
is too large, increase reverse gear thrust
washer thickness.
• If play is too small, reduce reverse gear thrust
washer thickness.
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