Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 211Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 211

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CYLINDER HEAD
45 Cutter

1 Clean the carbon deposits from the valve Discard any cracked, warpedor burned valves2 Measure the valve stem diameter to check for wearReplace valves if no

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