2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 133Get this manual

2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 133

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Cylinder head NOTE: Turn the valve guide reamer clockwise to ream the valve guide Do not turn the reamer counterclockwise when removing the reamer

4 Measure the valve seat contact width w