Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 238Get this manual

Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 238

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CAMSHAFT AND VALVES

Valve seat cutting guidelines

1 The valve seat is centred on the valve face, but is too wide
Valve seat cutter set First: Use 90 cutter lightly Seco

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