1983 Ski-Doo Shop Manual, Page 13Get this manual
SECTION 01 TOOLS SUB- SECTION 02 (SERVI CE TOOLS ) )To install polyam id ring in crankcase277 engine
Polyamid ring pusher engine 277 MAG 420276930 PTO 420 276 940
Crankshaft feeler gauge 377503 engine PTO 420 876 620
PTOall 377503 engines