Mariner Mercury 105/140 JET, Service Manual

Page: 588 / 797

6B-32 - LOWER UNIT 90-824052R3 JUNE 2002
6. Remove thrust washer and O-ring. The thrust
washer acts as a bearing surface for the thrust
bearing and it should be inspected for pits, rust,
scoring or discoloration due to lack of lubricant.
O-ring should be inspected for cuts or abrasions
and replaced if necessary.
a
b
51883
a - Thrust Washer
b - O-Ring
7. Remove thrust bearing and thrust washer (not
used on Sport Master gear cases) from bearing
adaptor. Thrust roller bearing should be
inspected
for pitting, rust or signs of discoloration
(blueing) due to lack of lubricant. If thrust roller
bearing must be replaced, the bearing surfaces
on the thrust washer and propeller shaft where
the thrust roller bearing rides should also be
inspected for signs of wear.
c
b
a
51885
a - Thrust Bearing
b - Thrust Washer (Not Used on Sport Master Gear Cases
c - Bearing Adaptor
8. The forward gear bearing should be carefully
inspected for smoothness of movement, pits,
rust, or signs of discoloration (blueing) due to lack
of lubricant. If the bearing must be replaced, it is
recommended that a hammer and cape chisel be
used to break the bearing loose from the bearing
adapter. Be careful not to damage bearing
adapter when removing roller bearing.
a
b
51883
a - Forward Gear Bearing
b - Bearing Adaptor
Pinion Gear and Driveshaft
REMOVAL
1. Remove bearing retainer using Bearing Retainer
Tool (91-43506).
51865
b
a
a - Bearing Retainer
b - Bearing Retainer Tool (91-43506)
2. Place Driveshaft Holding Tool (91-34377A1) over
driveshaft splines.