6C-14 - LOWER UNIT 90-824052R3 JUNE 2002
NOTE: Reverse gear must be removed from bearing
carrier before propeller shaft needle bearing can be
removed.
b
c
51884
a
a - Propeller Shaft Needle Bearing
b - Mandrel
c - Oil Seals
PROPELLER SHAFT CLEANING AND
INSPECTION
NOTE: Cam follower and 3 metal balls (in end of
propeller shaft) are free and will fall out. Care should
be taken not to lose cam follower or 3 balls.
1. Clean propeller shaft assembly with solvent and
dry with compressed air.
2. Inspect bearing carrier oil seal surfaces for
grooves. Run fingernail across seal surface to
check for grooves. Replace shaft, if a groove is
found.
3. Visually check bearing surfaces of propeller shaft
for pitting, grooves, scoring, uneven wear or
discoloration (bluish color) from overheating.
Replace shaft and corresponding needle bearing
if any of the above conditions are found. (Bearing
carrier needle bearing contacts propeller shaft
just in front of oil seal surface. Forward gear
bearing contacts propeller shaft in front of sliding
clutch splines).
4. Inspect propeller shaft splines for wear and/or
corrosion damage.
5. Check propeller shaft for straightness. Use either
method, following:
Balance Wheels
Place propeller shaft on balance wheels. Rotate
propeller shaft, observe propeller end of shaft for
“wobble” and replace shaft if any “wobble” is
observed.
c
b
a
b
51877
a - Balance Wheels
b - Bearing Surfaces
c - Watch for “Wobble”
“Vee” Blocks and Dial Indicator
Position propeller shaft needle bearing surfaces on
“Vee” blocks. Mount a dial indicator at front edge of
propeller splines. Rotate propeller shaft. Dial
indicator movement of more than 0.006″ (0.152mm)
(or noticeable “wobble”) is reason for replacement.
b
c
a
b
51877
a - “Vee” Blocks
b - Bearing Surfaces
c - Measure with Dial Indicator at This Point
a
51876
a - Clutch “Dogs”
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