1989 Ski-Doo Repair Manual, Page 137Get this manual
Section 02 ENGINE Sub-section 05 (503 ENGINE TYPE)
ASSEMBLY
1, Armature plate
Position armature plate on crankcase, aligning marks on both parts
7, Loctite 242
Clean crankshaft extension taperApply Loctite 242 (blue medium strength) on taper
11,19, Flywheel22 mm lock washer