Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 280Get this manual

Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 280

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CAMSHAFT AND VALVES Refacing steps: Valve seat is centered on valve face but it is too wideValve cutter seat 90 cutter Use lightly 30 cutter Desired result To reduce the valve seat width
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