1979 Ski-Doo Supplementary Shop Manual, Page 94Get this manual
SECTION 04 SUB-SECTION 02 (ENGINES)
MAGNETO
CLEANING
Clean all metal components in non -ferrous metal cleaner_ CAUT ION: Clean armature and magneto using only clean cl oth To check air gap, insert feeler gauge of 0.30-0.45 mm (.012-.018"between magnet and coil endsIf necessary to adjust, slacken coil retaining screws and relocate coil
DISASSEMBLYASSEMBLY
G) With magneto retaining nut removed and hold -on support in place, install special puller onto hubTighten puller bolt and at same time, tap on bolt head using hammer to release magneto
replacing contact breakers, apply hght coat of grease on lubricating wick