Yamaha F100B F100C Outboards Factory Service Manual, Page 142Get this manual

Yamaha F100B F100C Outboards Factory Service Manual, Page 142

POWR CAUTION:

Power unit
6Set the crankshaft 8, and oil seals and into the cylinder body as shown
Install the bearings in their original position4Install the piston with the "UP" mark on the piston crown facing towards the flywheel magnet
S60C5A90

NOTE: Apply engine oil to the sides of the piston assembly
S60C5B20

Piston slider: 90890-06530 5Install half of the bearings (grooved bearings) into the cylinder body 7

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