1985 Ski-Doo snowmobile Service Manual, Page 208Get this manual
Section 02 Sub-section 11
(CARBURETORFUEL PUMP)
CARBURETORFUEL PUMP
MIKUNICARBURETOR
List of engines with their respective carburetor
Carburetor VM 28-242
ENGINE TYPE 247 253 377 Safari 377 IE Mirage III 377 SkandlcR 447 462