Yamaha 115-225 HP Outboards Service Manual, Page 63Get this manual

Q PERIODIC SERVICE

D333050

IGNITION TIMING ADJUSTMENT Timing plate adjustment NOTE:

For easy timing-plate adjustment, it is advisable to remove the spark plugs from all the cylinders1) Install dial-gauge in the spark-plug hole of No1 cylinder2) Slowly turn the flywheel CLOCKWISE, and set the piston at following position
Be sure to tum the flywheel clockwise, or the impellor blade will be twisted the other way, thus reducing pump performance
Piston position: 11S: 130L130: 1SOL1 SO: ProV1S0: 22S, ProV200: 17S, 200L200:

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