2005 Ski-Doo REV Series Shop Manual, Page 61Get this manual
Section 02 TROUBLESHOOTING Subsection 04 (ELECTRICAL SYSTEM)
SYMPTOM
ENGINE IS MISFIRING ERRATIC SPARK AT SPARK PLUG
CONDITION
TESTINSPECTION
RIDING ON WET SNOW1Check if spark plug wires andor spark plug cap seals are sealing out moistureaDefective wires andor sealsReplace defective part2Check if ignition system wiring harness connectors are in good condition andor are sealing out moistureaLoose connectors, corroded terminals or defective partsClean terminals and apply silicone dielectric greaseReplace defective parts
CONDITION
TESTINSPECTION
NORMAL USE 1Verify misfiring by observing flash of stroboscopic timing light; unplug connectors between magnetogenerator and vehicle wiring harness to isolate problemCheck condition of connectorsaDefective spark plug(s) andor cable(s)cap(s)Defective electrical system wiring harness andor accessories andignition cut-out switchesCondition of connector terminalsReplace defective parts andor repair damaged wiresReplace defective switch(es)Clean terminals and apply silicone dielectric greaseRIDING IN DEEP AND THICK SNOW1Perform all verifications outlined under ENGINE DOES NOT START NO SPARK AT SPARK PLUG2Check spark plugsProceed with spark plug analysis in order to identify source of problemaDefective andor worn spark plug(s) andor cable(s) andor cap(s)Engine related problemReplace defective part(s)Proceed with ignition system testing proceduresPerform engine analysis