1997 Ski-Doo Factory Shop Manual Volume Two, Page 198Get this manual
Section 05 ELECTRICAL Sub-Section 03 (IGNITION TIMING)
NIPPONDENSO TRIGGER COIL SYSTEM
454, 494, 583, and 670 Engine Types Ignition timing is adjusted by movement of trigger coilOn 583 engine raising position of trigger coil retards ignitionLowering position of trigger advances ignitionOn 454, 494 and 670 engines, moving trigger coil to right retards ignition and moving to left advances ignition
CAUTION