2001 Mercury Mariner 50-60HP Factory Service Manual, Page 261Get this manual
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CYLINDER BLOCKCRANKCASE
Cylinder Bore Specifications Bore Size Standard Bore 2.5591 in(65 mm) Oversize Bore-0.10 in(0.25 mm) 2.5689 in(65.25 mm) Oversize Bore-0.20 in(0.50 mm) 2.5787 in(6