1980 Ski-Doo Shop Manual, Page 158Get this manual
SECTION 03 SUB-SECTION 04, (CARBURETOR)
CARBURETOR SPECIFICATIONS
MODEL ENGINE TYPE 247 CARBURETOR TYPE Mikuni VM28-242 LOW SPEED ADJ IDLE SPEED R.P.M1100-1300
11 turn 11 turn
ELANSPIRIT CITATION 3500, MIRAGE CITATION 4500E, MIRAGE IIIE CITATION SS, MIRAGE SPECIAL EVEREST 5001 FUTURA 5001 EVEREST LC, FUTURA LC BLIZZARD 5500 GRANO PRIX SPECIAL BLIZZARD 7500 SUPER SONIC BLiZZARO 9500 ULTRA SONIC ALPINE 640ER ELITE 450 LC