Pinion Gear, Driveshaft And Forward Gear - Mercury 40 Service Manual

2. Replace cam follower if worn or pitted on either
end.
3. Replace sliding clutch if jaws are rounded or
chipped. Rounded jaws indicate the following:
a. Improper shift cable adjustment.
b. Engine idle speed too high while shifting.
c. Shifting too slowly.
e
e
a
b
d
a - Cam Follower
b - Guide Block
c - Spring
d - Sliding Clutch
e - Jaws
4. Check bearing surfaces of propeller shaft. If shaft
is worn/pitted, replace shaft and corresponding
bearing.
5. Replace propeller shaft if:
a. Splines are twisted or worn.
b. Oil seal surface is grooved in excess of 0.005
in. (0.12mm).
c. Shaft has a noticeable "wobble" or is bent
more than 0.006 in. (.152 mm). Check with a
dial indicator and V-blocks.
b
c
a - V-Blocks
b - Bearing Surfaces
c - Check with Dial Indicator Here
6B-16 - LOWER UNIT
c
51265
b
a
51139
Pinion Gear, Driveshaft and Forward
Gear
1. Hold driveshaft using Driveshaft Holding Tool
(91-817070); remove (and discard) pinion nut.
2. Remove driveshaft, pinion gear, and forward
gear.
3. Replace pinion gear if chipped or worn.
4. Replace bearing if rusted or damaged; or does
not roll freely. To remove, refer to "Lower Drive-
shaft Bearing", following.
5. Replace forward gear if gear teeth are chipped or
worn.
a
51043
c
d
b
a - Driveshaft Holding Tool (91-817070)
b - Pinion Nut
c - Driveshaft
d - Pinion Gear
e - Bearing
f - Forward Gear
6. Replace bearing if rusted or does not roll freely af-
ter cleaning in solvent. Remove as shown.
f
51263
19203
90-852572R1 JANUARY 1998
e