Mariner Mercury 105/140 JET, Service Manual

Page: 584 / 797

6B-28 - LOWER UNIT 90-824052R3 JUNE 2002
NOTE: Do not remove bearing carrier needle bearing
unless replacement is needed.
4. Use bearing removal and replacement tool
(91-31229A5) or equivalent to press bearings out
of bearing carrier.
b
c
a
51885
a - Needle Bearing
b - Push Rod
c - Mandrel
Propeller Shaft
INSPECTION
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 groove. Replace shaft if 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. Reverse 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, as shown.
Rotate propeller shaft and observe propeller end of
shaft for “wobble.” Replace shaft if any “wobble” is
observed.
51877
c
b
a
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.
DISASSEMBLY
1. Remove shift cam from cam follower.
2. Insert a thin blade screwdriver or awl under first
coil of cross pin retainer spring and rotate
propeller shaft to unwind spring from sliding
clutch. DO NOT over stretch spring.
a
51875
a - Cross Pin Retainer Spring