Mercury 40 Service Manual page 526

BIGFOOT GEAR HOUSING
12. Remove components from propeller shaft.
13. Replace cam follower if worn or pitted.
14. Replace sliding clutch if jaws are rounded or chipped. Rounded jaws indicate one or
more of the following:
a -
b -
c -
d -
e -
15. Check bearing surfaces of propeller shaft for pitting or wear. If shaft is worn or pitted,
replace shaft and corresponding bearing.
16. Replace propeller shaft if any of the following exist:
a -
b -
c -
Page 6B-20
Improper shift cable adjustment.
Engine idle speed too high while shifting.
Shifting from neutral to reverse (or forward) too slowly.
a b c
Cam Follower
3 Metal Balls
Guide Block
Spring
Sliding Clutch
f - Jaws
Splines are twisted or worn.
Oil seal surface is grooved.
Shaft has a noticeable "wobble" or is bent more than 0.009 in. (0.228 mm). Prop
shaft trueness should be measured with a dial indicator with prop shaft on V-blocks.
c
V-Blocks
Bearing Surfaces
Measure with Dial Indicator at This Point
e
d
f
f
b
b
a
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90-828631R3 MARCH 1999