1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 117Get this manual
LUBRICATION, MAINTENANCE AND TUNE-UP
Refer to the following drawings to identify the factory timing marks: Figure 60-Models EXT 580, ZR 440 and ZR 580; 1995-1998 Cougar, Cougar Deluxe, Cougar Mountain Cat, Panther 550 and Prowler 2-up
Figure 61-Model ZL 440; prior to 1995 Cougar, Cougar Mountain Cat, Prowler and Prowler 2-upFigure 62-Models ZR 580 EPI, EXT 580 EFI, EXT 580 EFI Deluxe and Pantera 580Figure 63-Models Powder Special and ZL 500Figure 64-Models EXT 600 Triple, EXT 600 Triple Touring and ZRT 6003Attach stroboscopic timing light according to the manufacturer's instructions to the MAG side spark plug lead (Figure 65)4Connect tachometer according to the manufacturer's instructions5Position the machine, on its skis, so the tips of the skis are against wall or other immovable barrierElevate and support the machine so the track is completely clear of the ground and free to rotateWARNING Do not allow anyone to stand behind or in front of the machine when the engine is runningKeep hands, feet and clothing away from the track when it is runningNOTE Because ignition components are temperature sensitive, check ignition timing when the engine is at normal temperature