Mariner Mercury 105/140 JET, Service Manual

Page: 718 / 797

6E-26 - LOWER UNIT
90-824052R3 JUNE 2002
2. Remove thrust bearing and thrust washer from
reverse gear bearing cup.
50882
a
b
c
a - Thrust Bearing
b - Thrust Washer
c - Reverse Gear Bearing Adaptor
3. Remove reverse gear bearing adaptor. Remove,
measure and make note of the shim thickness
and discard (DO NOT reuse) the shims.
50780
a
b
c
d
e
f
a - Bolt (91-31229)
b - Nut (91-11-24156)
c - Guide Plate (91-816243)
d - Washer (91-34961)
e - Puller Head (from Slide Hammer Puller Kit 91-34569A1)
f - Jaws (91-816242)
CLEANING AND INSPECTION
CAUTION
DO NOT spin bearings dry with compressed air,
as this could cause bearing to score.
1. Clean reverse gear and bearing with solvent and
dry with compressed air. DO NOT spin the
bearing.
2. Inspect gear teeth for pitting, grooves, scoring,
uneven wear and for discoloration (from over-
heating). Replace gear if any of these conditions
are found.
3. Check clutch jaws on reverse gear for damage.
Replace reverse gear if damage is found.
23351
b
a
a - Reverse Gear Teeth
b - Clutch Jaws
NOTE: The needle bearings in the reverse gear
should not be removed unless damage has been
found. Inspect to ensure that all of the needles are
present and in position. Needles that have been
dislodged may be snapped back into place as long as
no damage has occurred to the bearing cage.
4. Inspect the needle bearings on the inside of the
reverse gear and the bearing surface on the
propeller shaft. If either the needle bearings or
the bearing surface of the propeller shaft is pitted
grooved, worn unevenly, discolored from
overheating or has embedded particles, replace
the propeller shaft and needle bearing in the
reverse gear.
a
a - Reverse Gear Needle Bearing Contact Area