CLOSED COOLED (FRESH WATER) MODELS SERVICE MANUAL NUMBER 23
Page 6B-10 90-861326--1 MARCH 1999
Thermostat
Removal
NOTE: If coolant flow is restricted or fails to occur, a wire should be repeatedly inserted into
all drain holes to ensure there are no obstructions in passages. Remove petcock, if neces-
sary, to insert wire completely into drain hole.
1. Drain engine block by removing drain plug. Be sure to drain both port and starboard
sides.
74130
a
Starboard Side Shown (Port Side Similar)
a-Hose
b-Drain Plug In Exhaust Manifold Elbow
2. Disconnect hoses from thermostat cover.
3. Remove thermostat cover attaching bolts and lockwashers, then remove cover and
gasket.
4. Remove thermostat from thermostat housing.
75746
a
b
c
d
a-Thermostat Housing
b-Thermostat
c-Gasket
d-Thermostat Housing Cover
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