Ski-Doo Formula S 1998, Shop Manual

Page: 213 / 338

Section 06 ELECTRICAL
Subsection 03 (IGNITION TIMING)
06-03-3
Connect tachometer wire to spark plug wire or
aim tachometer toward spark plug wire without
using any connection wire.
2. Start the engine and point timing light straight
in line with the fan cowl timing mark. Bring en-
gine to 6000 RPM for a brief instant.
TUNDRA II LT
1. Fan cowl timing mark
2. Yellow fin
3. Check if the yellow fin aligns with the fan cowl
timing mark. Tolerance is 1°.
NOTE: On the NIPPONDENSO ignition system,
timing advance decreases as engine speed in-
creases. When marks are aligned at 6000 RPM,
spark occurrence is still Before Top Dead Center.
If the yellow fin aligns with the fan cowl timing
mark, timing is correct.
If timing adjustment is required, rewind starter
and starter pulley have to be removed. For remov-
al procedure, refer to CDI SYSTEM 04-05.
IGNITION TIMING ADJUSTMENT
Timing is performed by moving armature plate,
clockwise to retard spark occurrence, counter-
clockwise to advance.
TYPICAL
1. To retard
2. To advance
To adjust, loosen 3 armature plate retaining
screws and lightly rotate armature plate in proper
direction.
1. Retaining screws
Refer to the difference between the fan cowl tim-
ing mark and the yellow fin to determine the
amount of rotation.
When the yellow fin is on left side of fan cowl tim-
ing mark, it indicates too advanced timing.
;
WARNING
Place ski tips against a wall, raise rear of ve-
hicle on a stand so that track does not con-
tact the ground. Do not allow anyone in front
or behind the vehicle while engine is run-
ning. Keep clear of track and do not wear
loose clothing which can get caught in mov-
ing parts.
A05E03A
2
1
A25E0RA
1
2
A25E0VA
1
1
1