Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 234Get this manual

Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 234

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CAMSHAFT AND VALVES
When replacing the valve, always use new valve guide and valve seal
Valve spring inspection 1 Measure: Valve spring free length Out of specification Replace the valve s