1974 Ski-Doo Shop Manual, Page 95Get this manual
support in place, install special puller onto hub Tighten puller bolt and at same time, tap bolt head using hammer to release magneto from its taper(See Tool Section)
At assembly, torque retaining nut to 42-50 ft-IbMake sure that belt is not squeezed between pulley halvesCorrect fan belt free-play is 14"To adjust, add or remove shim(s) between inner and outer pulley halvesExcess shim(s) must be positioned between outer pulley half and fan Fan belt alignment For reliable fan belt operation, the two fan belt pulleys must lie within .020" of either side of the pulley center linePrio to checking alignment, check fan belt free-playPosition and secure aligning tool (See Tool Section) on magneto housing as illustrated
Note: Do not separate magneto housing from magneto ring unless necessaryA assembly, apply Loctite"Lock 'n Seal" on magneto housing hub where magneto ring center bore sitsWhen coil is replaced, the air gap between magnet and armature must be adjustedTo check air gap insert feeler of correct thickness (.025 mm.01O"-0.39 mm.015") between magnet and each armature end