Ignition Timing Adjustment - Yamaha 20C Service Manual

GEN
SRVC PERIODIC SERVICE
D33308-0*

IGNITION TIMING ADJUSTMENT

1. Full advanced position
1) Remove the magneto control rod.
2) Install a dial-gauge in the spark-plug hole of
No.1 cylinder.
NOTE:
For easy timing-plate adjustment, it is advisable to
remove the spark plugs from all the cylinders.
3) Slowly turn the flywheel CLOCKWISE, and
stop it when the piston is at TDC.
cC
Be sure to turn the flywheel clockwise, or the
impeller blade will be twisted the other way,
thus reducing pump performance.
4) If the end of timing plate is not aligned with the
TDC mark on the CDI magneto rotor, loosen
the timing plate set screw, align the timing plate
end with the TDC mark, then tighten the screw.
NOTE:
After tightening the screw, paint over the screw-
head to discourage tampering with the adjustment.
3-9
E