Mercury 5 SERIES Service Manual page 117

3. Rotate flywheel until raised mark on camshaft is visible through fuel pump hole and
notched mark on flywheel aligns with TDC mark on block casting. Piston is now at top
dead center and valve clearance may now be checked with feeler gauge.
a
a -
b -
c -
d -
e -
4. Measure valve clearance with a feeler gauge. Adjust if out of specification.
b
a -
b -
90-857138R1 MAY 2000
Raised Mark on Camshaft
Notched Mark on Flywheel
TDC Mark
5 BTDC Mark on Block Casting
25 BTDC Mark on Block Casting
a
Intake Valve
Exhaust Valve
Intake
Exhaust
Valve Clearance (Cold)
0.002 - 0.005 in. (0.06 - 0.14 mm)
0.004 - 0.007 in. (0.11 - 0.19 mm)
CYLINDER HEAD
b
c
d e
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