Ski-Doo Formula 500 1998, Руководство по ремонту

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Section 06 ELECTRICAL
Subsection 02 (IGNITION TIMING)
06-02-1
IGNITION TIMING 0
DUCATI CDI SYSTEM
443 and 503 Engine Types
Proper ignition timing is determined by trigger coil
position.
If for any reason, ignition timing accuracy is sus-
pected, it can be checked as follows.
Verifying Magneto Flywheel Timing
Mark Position
Prior to checking the timing, it may be necessary
to verify the position of the timing mark on the
magneto flywheel, for the following reasons:
1. To detect a missing or broken magneto fly-
wheel Woodruff key which would allow a
change of timing to occur, with eventual break
down of the engine.
2. To correctly locate and mark a timing mark on a
new service magneto flywheel.
3. To verify the correct location of the factory tim-
ing mark.
4. To detect a wrong magneto flywheel.
To verify the position of the timing mark on the
magneto flywheel, proceed as follows:
1. Clean the area around the spark plugs, and re-
move them.
2. Remove the rewind starter from the engine.
3. Install the TDC gauge in the spark plug hole,
(magneto/generator side) and adjust as follows:
a. Position the magneto flywheel at approxi-
mately TDC.
INSTALLATION OF TDC GAUGE
1. Adapter lock nut
2. Gauge on MAG side cylinder
b. Assemble the gauge to the adapter and tight-
en the roller lock nut. Do not tighten the
adapter lock nut.
c. Screw the adapter into the spark plug hole
and tighten to prevent movement in the plug
hole.
d. Position the dial face toward the magne-
to/generator. Move the gauge down until the
needle just begins to move, then move
down a further 5 or 6 mm (approximately 1/4
in). Tighten adapter lock nut by hand.
A17E0YA
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