14-24
DF90/115/140 “K4” (’04) MODEL
LOWER UNIT GEARS-SHIMMING AND ADJUSTMENT
In accordance with the eliminate of the washers preloading to
driveshaft, the servicing procedure for “Tooth Contact Pattern
Check” has been changed.
Checking and adjusting tooth contact pattern
(Pinion and Forward gear)
Check the tooth contact pattern by using the following procedure:
1. To assess the tooth contact, apply a light coat of Prussian
Blue on the convex surface of the forward gear.
2. Install the propeller shaft and the housing assembly (minus
the reverse gear and the internal components).
3. Push the propeller shaft inward and hold in position.
4. Pull the driveshaft upward and hold in position.
5. Using driveshaft holder tool, rotate the driveshaft 5 – 6 times.
09921-29410: Driveshaft holder
6. Carefully pull out the propeller shaft and the housing to
check the tooth contact pattern.
Tooth width
Concave side
Convex side
Heel
Tooth top
Tooth bottom
Toe
TOOTH
CONTACT
PATTERN
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