BOMBARDIER ski-doo Tundra Scandic 2004 Series, Shop Manual, Page: 296 / 427

Section 06 ELECTRICAL
Subsection 02 (IGNITION TIMING)
MMR2004-130_06_02A.FM
06-02-5
TACHOMETER (P/N 529 014 500)
To check the ignition timing, refer to illustration
and proceed as follows:
1. Connect the timing light pick-up to a spark plug
cable.
NOTE: To avoid an incorrect reading due to paral-
lax, view the magneto flywheel and the crankcase
timing marks in a straight line.
2. Connect tachometer wire to spark plug wire or
aim tachometer toward spark plug wire without
using any connection wire.
3. Start the engine and raise the engine speed at
least to 3500 RPM (3000 to 4000 RPM) while
observing the timing marks, refer to illustration.
The magneto flywheel mark scribed previously
and the crankcase arrow should be perfectly
aligned. If the marks do not align, a faulty trigger
coil (check proper grounding of coil), a faulty fly-
wheel, a faulty Woodruff key, a misaligned
(twisted) crankshaft or a faulty CDI module
could be the cause: substitute one part at a time
and recheck timing marks (check connectors
condition prior to substituting any part).
NOTE: Ignition timing may be verified when en-
gine speed is anywhere within 3000 - 4000 RPM.
1. Timing light pick-up on MAG side
2. Crankcase arrow
3. Magneto flywheel mark
4. Install parts which were removed.
DUCATI CDI SYSTEM
552 Engine Types on Skandic WT/SWT/SUV 550
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 flywheel
Woodruff key which would allow a change of
timing to occur, with eventual break down of
the engine.
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WARNING
Place ski tips against a wall, raise rear of ve-
hicle on a stand, so that track does not contact
the ground. Do not allow anyone in front of
or behind the vehicle while engine is running.
Keep clear of track and do not wear loose
clothing which can get caught in moving parts.
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