Mercury 4 SERIES User Manual

Name: Mercury 4 SERIES
Brand: Mercury
Rating: 5 (1 reviews)

260 pages

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CYLINDER HEAD

90-857138R1 MAY 2000 Page 4A-13

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.

57255

a-Water Passages

b-Combustion Chamber

3. Using a straight edge and a thickness gauge inspect cylinder head for warpage. Re-

place cylinder head If out of specification.

Cylinder Head Warpage Limit

0.0012 in. (0.03 mm)

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