Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 242Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 242

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CYLINDER BLOCKCRANKCASE
2.55702.5578 in(64 .95064.965 mm) 2.56692.5675 in(65 .265.215 mm) 2.57682.5774 in(65.45065.465 mm)

3 Measure piston to cylinder clearance If out of specifica