2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 147Get this manual
Cylinder block Checking the piston pin
1Measure the piston pin diameterReplace if out of specification
Piston pin diameter: 21.00 mm (0.827 in)
Checking the connecting rod small end inside diameter
1Measure the connecting rod small end inside diameter aReplace the connecting rod if out of specification
Connecting rod big end side clearance a: 0.200.25 mm (0.0080.010 in)
Checking the crankshaft