2001 Mercury Mariner 50-60HP Factory Service Manual, Page 225Get this manual

2001 Mercury Mariner 50-60HP Factory Service Manual, Page 225

CYLINDER HEAD
Cylinder Head
1Inspect the cylinder head for the following conditions: Mineral depositscorrosion in water passage waysCarbon deposits In combustion chamber (use round scraper to clean away deposits)Be careful not to scratch or remove material
2Inspect cylinder head for warpageReplace cylinder head If out of specification