Ski-Doo Formula 500 1998, Shop Manual

Page: 123 / 398

Section 04 ENGINE
Subsection 05 (CDI SYSTEM)
04-05-3
1. Magneto harness through crankcase hole
– Install new trigger coil and other parts re-
moved.
Preliminary Adjustment
NOTE: The final trigger coil adjustment will be
done when checking ignition timing.
Whenever the trigger coil or the magneto fly-
wheel is removed or replaced, the air gap be-
tween the trigger coil and the flywheel protrusion
must be checked and adjusted. The purpose of
this adjustment is to obtain the minimum clear-
ance between these parts — without touching at
any RPM — so that the trigger coil produces its
proper electrical output. Ignition timing must also
be checked. Refer to IGNITION TIMING 06-02
then look for
Checking Ignition Timing .
Proceed as follows:
1. Rotate flywheel so that the protrusion aligns
with trigger coil.
2. Using a feeler gauge of 0.75 mm (.030 in) thick
(allowable range is 0.55 mm (.022 in) to
1.45 mm (.057 in)), check air gap between cen-
ter pole of trigger coil and flywheel protrusion.
3. If necessary, adjust by loosening retaining
screws and moving trigger coil toward or away
of protrusion.
4. Retighten screws and recheck air gap.
PRELIMINARY TRIGGER COIL AIR GAP ADJUSTMENT
1. Trigger coil
2. Flywheel protrusion
3. Measure at center pole of trigger coil 0.75 mm (.030 in)
1, Stator
To replace stator:
– Disconnect the 3-wire connector (BLACK, RED
and BLACK/RED wires).
– Disconnect both YELLOW wires.
– Remove grommet from crankcase where mag-
neto harness exits magneto housing.
– Remove stator plate retaining screws.
– Remove stator plate with stator and carefully
pull wires.
– Install new parts and other parts removed tak-
ing care not to squeeze trigger coil harness.
-
CAUTION
Each time trigger coil air gap is adjusted, ig-
nition timing must be checked.
A25E1AA
1
A15E0NA
2
3
1