Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 196Get this manual

Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 196

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CRANKCASE, CRANKSHAFT AND CAMSHAFT
Piston installation 1 Install:
9 Piston

Piston slider: YB-3445490890-06529

9 Make sure that the end gap of each ring