Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 270Get this manual

Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 270

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CRANKCASE AND CRANKSHAFT

Piston ring installation 1 Install: Oil ring 2nd piston ring Top piston ring NOTE: Make sure the "N" mark on the piston ring faces upward9 When installing the oil