Disassembly; Water Pump - Mercury 40 Service Manual

6. Remove 4 bolts securing gear case to drive shaft
housing.
a - Bolt (4)

Disassembly

Water Pump

NOTE: If water tube seal remained in drive shaft
housing, remove seal from housing and reinstall on
water pump cover. Secure seal to cover with Loctite
405.
1. Remove 4 bolts securing pump cover.
a
a - Seal
b - Bolt (4)
NOTE: Replace cover if thickness of steel at dis-
charge slots is 0.060 in. (1.524mm) or less, or if
groove(s)(other than impeller sealing groove) in cov-
er roof are more than 0.030 in. (0.762mm) deep.
90-852572R1 JANUARY 1998
a
52836
b
52830
2. Remove cover, washer (above impeller), impel-
ler, key and washer (below impeller).
3. Remove cover gasket, base plate and base gas-
ket.
a - Cover
b - Washer (above impeller)
c - Impeller
d - Key
e - Washer (below impeller)
f - Cover Gasket
g - Face Plate
h - Base Gasket
NOTE: Replace impeller if:
– Impeller blades are cracked, torn or worn.
– Impeller is glazed or melted
– Rubber portion of impeller is not bonded to
impeller hub.
a
b
c
d
e
f
g
h
52692
LOWER UNIT - 6A-11