Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 210Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 210

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CYUNOER HEAD
Desired Results To achieve uniform valve seat width

45 Cutter

Condition: Valve seat is too narrow and it is near valve margin
Valve Seat Cutter Set

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