1982 Ski-Doo Shop Manual, Page 139Get this manual
SECTION 02 ENGINE SUB-SECTION 07 (640 ENGINE TYPE)
CLEANING
Clean all metal components in non-ferrous metal cleaner_ CAUTION: Clean armature and magneto using only clean cloth
DISASSEMBL Y
- To gain access to magneto assembly, remove: fan grill rewind starter
Magneto housing puller
- starting and V-belt pulleys NOTE: Before disassembling magneto plate, indexing marks should be located to facilitate re-assembly
tighten puller bolt and at same time, tap on bolt head using hammer to release magneto from its taper
To remove magneto flywheel retaining nut: lock crankshaft with crankshaft locking tool (service tool) as illustrated remove magneto retaining nut