• Oil seal surface is grooved
•
Shaft has a noticeable wobble or is bent more than 0.15 mm (0.006 in.)
a - Check shaft for wobble
b - Check for twisted
splines
c - Check for seal surface
grooves
d - Check for needle
bearing surface pits or
wear
Water Pump, Driveshaft, and Shift Shaft Disassembly
1.
Remove the four screws and four washers from the water pump cover.
a - Screws (4) and washers (4)
b - Water pump cover
2. Remove the cover from the driveshaft. Be careful to not lose the two dowel pins.
NOTE: The water pump cover liner may remain with the impeller when the cover is removed. This is not a problem.
a - Dowel pins (2)
b - Water pump cover liner; impeller
is inside the liner
3. Remove the impeller and the drive key from the driveshaft.
IMPORTANT:
The impeller should be replaced, regardless of appearance, whenever the gearcase is serviced. If the old
impeller must be used, it must be installed in the direction of the original rotation. Installing the impeller with the vanes
reversed from their original direction will result in vane breakage.
Gear Housing (2.15:1)
Page 6A-18 © 2018 Mercury Marine 90-8M0125265 eng NOVEMBER 2017
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