1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 169Get this manual

1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 169

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CAMSHAFT AND VALVES
NOTE: Heat the cylinder in an oven to 200 (392 to ease valve guide removal and F) installation, and to maintain the correct interference fit Remove the valve guide with the v