Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 244Get this manual

Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 244

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CAMSHAFT AND VALVES

9 Set the attachment onto the center of the spring retainer9 Do not overtighten the valve spring compressor