1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 191Get this manual

IpOWRlt41CRANKCASE, CRANKSHAFT ASSY AND CYLINDER BODY Piston-to-cylinder clearance 1Calculate: Piston-to-cylinder clearance Out of specification Replace the piston and piston rings, the cylinder or bothPiston-tocylinder clearance
Cylinder bore

Piston diameter

Piston-to-cylinder clearance: 0.0350.065 mm (0.00140.0026 in)

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