1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 115Get this manual
LUBRICATION, MAINTENANCE AND TUNE-UP
failures caused by dirt, moisture and wear than earlier breaker point systemsDifferent troubleshooting, testing and timing procedures may be used for the various models, so it is important to use the correct procedure for the engine being servicedStatic timing to verify the flywheel timing marks may be necessary before using timing light to check ignition timingMost flywheels are marked with several lines, but the correct timing mark may not be easily distinguished from the other linesThe static timing procedure can be used for the following: ato verify and identify factory timing marksbto detect broken or missing flywheel Woodruffkeycto detect twisted crankshaftdto scribe timing marks on new flywheelDynamic engine timing uses timing light connected to the MAG (magneto) side spark plug leadAs the engine is cranked or running, the light flashes each time the spark plug firesWhen the light is pointed at the moving flywheel, the mark on the flywheel appears to stand stillThe flywheel mark should align with the stationary timing pointer on the engine