1985 Ski-Doo snowmobile Service Manual, Page 15Get this manual
Section 01 TOOLS Sub-section 02 (SERVICE TOOLS)
Fan holder 503 engine 253, 377447 engines 420876 355 420 876 357
Fan holder
Axial fan cooled engine types
"000002026
Protection cap
Protect crankshaft end, when using bearing puller
Protection cap
247,377,447,462503 engine types
"000002029
247 engine 18 mm 420 976 890 377, 447, 462, 503 22 mm 420 876 402