Ignition Timing; Single Cylinder Rer Cdi System - BOMBARDIER ski-doo Tundra Scandic 2004 Series Shop Manual

IGNITION TIMING

SINGLE CYLINDER RER
CDI SYSTEM
Tundra 277 Engine Type
This 277 engine type is equipped with a Rotax
Electronic Reverse system (RER). It uses a single
coil ignition system and 2 trigger coils. Refer to
CDI SYSTEM for more information.
This section is mainly divided in 2 parts, the first
one using a Top Dead Center gauge to verify the
magneto flywheel timing mark position. The
second one using a stroboscopic timing light to
check ignition timing.
Flywheel timing mark position verification is re-
quired to:
1. To detect a missing or broken magneto flywheel
Woodruff key which change the timing, 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.
Always verify magneto flywheel timing mark posi-
tion before checking ignition timing.
Verifying Magneto Flywheel Timing
Mark Position
1. Disconnect spark plug wire and remove spark
plug.
2. Install and adjust TDC gauge on engine as fol-
lows:
– Rotate magneto flywheel clockwise until pis-
ton is just Before Top Dead Center.
MMR2004-130_06_02A.FM
Section 06 ELECTRICAL
Subsection 02 (IGNITION TIMING)
1. Outer ring
2. Adaptor lock nut
3. Roller lock nut
4. Adaptor
– Loosen adaptor lock nut then holding gauge
with dial face toward magneto, screw adap-
tor in spark plug hole.
– Slide gauge far enough into adaptor to obtain
a reading then finger tighten adaptor lock nut.
– Rotate magneto flywheel clockwise until pis-
ton is at Top Dead Center.
– Unlock outer ring of dial and turn it until "0"
(zero) on dial aligns with pointer.
– Lock outer ring in position.
3. From this point, rotate magneto flywheel back
1/4 turn then rotate it clockwise to reach the
specified position. Refer to TECHNICAL DATA.
0
06-02-1