Ski-Doo Formula S 1998, Shop Manual

Page: 216 / 338

Section 06 ELECTRICAL
Subsection 03 (IGNITION TIMING)
06-03-6
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/
generator. If it is necessary to turn back (counter-
clockwise) for any reason, rotate the magneto fly-
wheel at least one-quarter turn counterclockwise,
and then rotate it clockwise. The last magneto fly-
wheel movement when making a critical check
must always 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. Refer to TECHNI-
CAL DATA 10.
b. Verify that the magneto flywheel mark per-
fectly aligns with the mark on the trigger coil,
refer to illustration.
c. If the marks do not align, check magneto fly-
wheel and trigger coil part numbers and
check Woodruff key condition. If all parts are
the appropriate ones and if Woodruff key is
in good condition, continue the procedure.
1. Trigger coil mark
2. Magneto flywheel mark
NOTE: These marks cannot be used to check dy-
namic (with engine running) ignition timing with a
timing light: a new mark must be scribed on mag-
neto flywheel for this purpose.
6. Scribe a new mark on magneto flywheel as fol-
lows.
a. Remove the fan cover from the engine.
b. Maintain magneto flywheel so that previous
marks remain aligned.
c. Scribe or punch a mark on magneto flywheel
so that it perfectly aligns with the arrow on
crankcase, refer to illustration. This new tim-
ing mark should be used for future timing
checks (dynamic timing).
d. Reinstall rewind starter.
e. Check the timing with a timing light.
1. Crankcase arrow
2. Scribe a mark here
3. Maintain verified timing marks aligned (static timing)
Checking Ignition Timing
Use timing light (P/N 529 0319 00).
TIMING LIGHT (P/N 529 0319 00)
A17E10A
2
1
A17E0ZA
1
2
3
A00B4FA