320
GEARCASE SERVICE, 75 – 90 HP MODELS
WATER PUMP SERVICE
Apply Triple-Guard gre ase to threads o f the trim
tab screw. In stall and align the trim t ab with the
index marks n oted prior to disassembly. Tighten
the trim t ab screw to a t orque o f 35 to 40 f t. lbs.
(47 to 54 N·m). For ad justment, refer to Trim Tab
Adjustment on p. 31.
Place the shift rod in the shift rod lever. Install the
retaining pin an d washer. Tighten pin to a torque
of 60 to 84 in. lbs. (7 to 9.5 N·m).
IMPORTANT: During break-in period of a rea s-
sembled gearcase, change the gearcase lubricant
between 10 to 20 hours of operation.
WATER PUMP SERVICE
Disassembly
Rotate the driveshaf t counterclockwise to unlock
the impeller key. Remove th e four impeller hous-
ing screws.
Slide the wate r pump of f th e drivesh aft. Remove
the impeller key , O-rin g, impeller plate, and gas-
ket. Discard the gasket.
Remove all the parts from the housing.
Inspection
Check impeller for o verheating, hub sep aration,
and other wear or damage.
Check liner and wear plate for scoring, distortion,
and impeller material transfer.
Inspect the housing for cracks or melting.
Make sure gasket surface is clean and smooth.
1. Trim tab screw
2. Index mark
COA3663
1. Shift rod screw 002013
A WARNING
To prevent loss of operator control, check
for proper shifting operation and adjust, if
necessary.
1. Screws 31998
1. O-ring
2. Impeller plate
DSC02328
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