1996 Ski-Doo Shop Manual, Volume 1, Page 42Get this manual
Se ion ROU BLESH OOT Sub-Section 01 (ENGINE)
SYMPTOM CONDITION TestInspection
ENGINE DETONATION AT MAXIMUM RPMNORMAL USE1) Check which type of fuel is useda) Octane number is too low and or alcohol level is too highUse recommended fuel type2) Check spark plug typea) Improper spark plug heat rangeInstall recommended sparkplug(s) (refer to technical data 10)3) Check exhaust systema) Too much restrictionReplace4) Check ignition timinga) Timing is too advancedAdjust according to specification (refer to technical data 10)5) Check carburetiona) Fouled andor improper carburetor componentsClean or replace according to specification (refer to technical data 10)6) Check compression ratio and squish areaa) Compression ratio is too highInstall genuine parts