2002 Ski-Doo Shop Manual Volume Two, Page 84Get this manual
Section 03 TROUBLESHOOTING Subsection 05 (ELECTRICAL SYSTEM)
8Check height of commutator micaaCommutator mica too highUndercut mica9Check field coil resistanceaShorted field coilRepair or replace yoke10Check armature resistanceaShorted armatureRepair or replace armature11Check tension of brush springsaWeak brush spring tensionReplace springs12Check yoke assembly magnetsaWeak magnetsReplace yoke assembly13Check if bushings are wornaWorn bushingsReplace bushings