2002 Ski-Doo Shop Manual Volume One, Page 255Get this manual
Section 06 ELECTRICAL Subsection 02 (IGNITION TIMING)
IGNITION TIMING
SINGLE CYLINDER RER CDI SYSTEM
Tundra 277 Engine Type This 277 engine type is equipped with Rotax Electronic Reverse system (RER)It uses single coil ignition system and trigger coilsRefer to CDI SYSTEM for more informationThis section is mainly divided in parts, the first one using Top Dead Center gauge to verify the magneto flywheel timing mark positionThe second one using stroboscopic timing light to check ignition timingFlywheel timing mark position verification is required to: 1To detect missing or broken magneto flywheel Woodruff key which would allow change of timing to occur, with eventual break down of the engine2To correctly locate and mark timing mark on new service magneto flywheel3To verify the correct location of the factory timing mark4To detect wrong magneto flywheel corresponding to different engine typeAlways verify magneto flywheel timing mark position before checking ignition timing1 2