Mariner Mercury 105/140 JET, Service Manual

Page: 629 / 797

6C-12 - LOWER UNIT 90-824052R3 JUNE 2002
9. Remove water pump face plate and both gaskets
(one above and below face plate) from water
pump base.
10. Remove the flush plug from gear housing, if so
equipped.
11. Using 2 pry bars, positioned and padded as
shown, lift water pump base up and off driveshaft.
12. Remove (and discard) O-ring from O-ring groove
on water pump base.
13. Using a screwdriver, pry oil seals out of water
pump base from gear housing side of base.
a
51874
a - Pads
Cleaning and Inspection
1. Clean all water pump parts with solvent and dry
with compressed air.
2. Inspect water pump cover and base for cracks
and distortion (from overheating).
3. Inspect face plate and water pump insert for
grooves and/or rough surfaces.
IMPORTANT: When completing gear housing re-
pairs that require removal of water pump impel-
ler, it is recommended that the impeller be re-
placed. It it is necessary, however, to re-use
impeller, DO NOT install in reverse to original ro-
tation, or premature impeller failure will occur.
4. Inspect impeller side seal surfaces and ends of
impeller blades for cracks, tears and wear. Re-
place impeller if any of these conditions are
found.
5. Inspect impeller bonding to impeller hub.
6. Inspect impeller for glazed or melted appearance
(caused by operation without sufficient water
supply). Replace impeller if any of these condi-
tions exist.
Bearing Carrier and Propeller Shaft
Removal
1. Bend cover nut lock tab out of cover nut recess.
b
a
51865
a - Punch
b - Tab of Tab Washer
2. Remove gear housing cover nut with Cover Nut
Tool (91-73688).
51879
a
a - Cover Nut Tool (91-73688)
3. After cover nut has been removed, remove lock
tab washer from gear housing.