Mercury 40 Service Manual page 470

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 -
b -
NOTE: Replace cover if thickness of steel at discharge slots is 0.060 in. (1.524 mm) or less,
or if groove(s) (other than impeller sealing groove) in cover roof are more than 0.030 in.
(0.762 mm) deep.
90-828631R3 MARCH 1999
a
Seal
Bolt (4)
NON-BIGFOOT GEAR HOUSING
b
52830
Page 6A-15