Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 232Get this manual

Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 232

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CAMSHAFT AND VALVES

3 Measure: Margin thickness Out of specification Replace the valveMargin thickness: 0.5 0.90 mm (0.0200.035 in)

4 Measure: Valve stem diameter Out of spec