Mercury 5 SERIES Service Manual page 121

Cleaning and Inspection
Cylinder Head
1. Inspect the cylinder head for mineral deposit blockage/corrosion in the water passage
ways, clean any deposits/corrosion observed.
2. Inspect the cylinder head for carbon deposits In combustion chamber (use round scrap-
er to clean away deposits). Be careful not to scratch or remove material.
a
a -
b -
3. Using a straight edge and a thickness gauge inspect cylinder head for warpage. Re-
place cylinder head If out of specification.
90-857138R1 MAY 2000
EX
Water Passages
Combustion Chamber
Cylinder Head Warpage Limit
0.0012 in. (0.03 mm)
b
IN
CYLINDER HEAD
a
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