Ski-Doo FORMULA S 1997, Shop Manual

Page: 186 / 926

Section 05 ELECTRICAL
Sub-Section 03 (IGNITION TIMING)
05-03-3
3. Check if the yellow fin aligns with the fan cowl
timing mark. Tolerance is 1°.
NOTE : On the NIPPONDENSO ignition sys-
tem, timing advance decreases as engine
speed increases. 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 03-05.
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.
In this case, turn armature plate clockwise.
1. Turn clockwise to retard
When the yellow fin is on right side of fan cowl
timing mark, it indicates retarded timing .
In this case, turn armature plate counterclock-
wise.
'
A25E0RA
1
2
A25E0VA
1
1
1
A25E0RB
1