ENGINE MECHANICAL
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 3A-55
Installation - Using Early Model Gaskets
HEAD GASKET IDENTIFICATION
NOTE: All engines with early model gaskets (head gasket fits a single-cylinder) use the
same type of cylinder head gaskets in one of three thickness as previously determined and
shown following.
The 1.52 mm (.060 in.) gasket has two notches while the 1.62 mm (.064 in.) gasket has one
notch where indicated. The 1.42 mm (.056 in.) gasket is plain, without notches.
75516
a
b
c
a-1.62 mm (.064 in.) Gasket, With One Notch
b-1.52 mm (.060 in.) Gasket, With Two Notches
c-1.42 mm (.056 in.) Gasket, Without Notches
INSTALLATION
1. Before installing cylinder heads follow instructions a. - c.:
a. Clean out bolt holes in cylinder block. Be certain no contaminants (dirt, old oil or
coolant) remain in holes.
b. Clean gasket surfaces on block and heads.
c. Oil cylinder bores with Quicksilver 4 cycle engine oil.
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