Ski-Doo FORMULA S 1997, Shop Manual

Page: 792 / 926

Section 05 ELECTRICAL
Sub-Section 03 (IGNITION TIMING)
05-03-2
b. Rotate the dial face so that “0” is in line with
the needle when it stops moving.
c. Again, slowly rotate the magneto flywheel
back and forth across TDC and adjust the dial
face to “0”, until the needle always stops ex-
actly at “0” before changing direction.
d. “0” now indicates exact TDC.
5. Verify the position of the timing mark on the
magneto flywheel as follows:
NOTE: When checking timing, certain procedures
require that the magneto flywheel be turned in a
clockwise direction, viewed facing the magneto.
If it is necessary to turn back (counterclockwise)
for any reason, rotate the magneto flywheel at
least one-quarter turn counterclockwise, and then
rotate it clockwise. The last magneto flywheel
movement when making a critical check must al-
ways be in a clockwise direction, to ensure that
the slack in engine moving parts is taken-up.
a. Rotate the magneto flywheel counterclock-
wise, one-quarter turn then carefully rotate it
clockwise until the needle indicates the
specified measurement, indicated in TECH-
NICAL DATA 09-02.
b. Make sure that the dot located on the side
of the magneto flywheel protrusion perfectly
aligns with center of trigger coil core, refer to
illustration.
c. If the marks do not align, loosen trigger coil
screws and move trigger coil to align dot
with center of trigger coil core.
1. Dot aligned with center of trigger coil core
2. Retard
3. Advance
NOTE: These marks can not be used to check dy-
namic (with engine running) ignition timing with a
timing light: an other mark is scribed on magneto
flywheel or damper for this purpose. When fly-
wheel protrusion dot aligns with center of trigger
coil core, flywheel mark and crankcase center
mark must be aligned.
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