Twin Cylinder Rer Cdi System - BOMBARDIER ski-doo Tundra Scandic 2004 Series Shop Manual

3. Check if the red fin aligns with the fan cowl tim-
ing mark. Tolerance is ± 1°.
If the red fin aligns with the fan cowl timing mark,
timing is correct. If not the case, check for proper
flywheel, trigger coil position or MPEM.
The RER ignition system is not adjustable. Only
trigger coil air gap can be verified. Refer to CDI
SYSTEM.
TWIN CYLINDER RER CDI
SYSTEM
Skandic LT
If for any reason, ignition timing accuracy is sus-
pected, it can be verified 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.
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 corre-
sponding to a different engine type.
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.
MMR2004-130_06_02A.FM
Section 06 ELECTRICAL
Subsection 02 (IGNITION TIMING)
TYPICAL — INSTALLATION OF TDC GAUGE
1. Gauge on MAG side cylinder
2. Adaptor lock nut
b. Assemble the gauge to the adaptor and tight-
en the roller lock nut. Do not tighten the adap-
tor lock nut.
c. Screw the adaptor into the spark plug hole
and tighten to prevent movement in the plug
hole.
d. Position the dial face toward the magneto/
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 adaptor lock nut by hand.
4. Locate the piston TDC position as follows:
a. Slowly rotate the magneto flywheel back and
forth across TDC while observing the needle.
Note that the needle stops moving only as
the piston changes direction.
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.
06-02-3