Disassembly; Water Pump - Mercury 40 Service Manual

Disassembly

Water Pump

NOTE: If water tube seal stayed on water tube (inside of driveshaft housing) when gear
housing was removed, pull water tube seal from water tube.
1. Replace water tube seal, if damaged.
2. Remove 4 bolts, washers, and isolators.
3. Remove cover.
a -
b -
c -
IMPORTANT: The circular groove formed by the impeller sealing bead should be dis-
regarded when inspecting cover (Step 5) and plate (Step 9), as the depth of the groove
will not affect water pump output.
4. Replace cover if thickness of steel at the discharge slots is 0.060 in. or less, or if
groove(s) (other than impeller sealing bead groove) in cover roof are more than 0.030
in. (0.762 mm) deep.
5. Lift impeller, drive key, and gasket from driveshaft.
a -
b -
c -
90-828631R3 MARCH 1999
a
b
Water Tube Seal
Bolts (4 each)
Cover
a
c
b
Impeller
Drive Key
Gasket
BIGFOOT GEAR HOUSING
c
b
19212
19220
Page 6B-13