1970-1979 Ski-Doo Snowmobiles Service Manual, Page 115Get this manual
108 Table TILLOTSON CARBURETOR SPECIFICATIONS Low Speed Adjustment (Turns) High Speed Adjustment (Turns)
CHAPTER FIVE
Model Elan 250,250 (1971,1972, early 1973) 250 (late 1973-1975) 29288 (1972) 250 (1973) 250 T, 250 Deluxe (1974) 250 Deluxe (1975) 250 (1976) 250 88 (1973) 29488 (1974) 300 58 (1975) 25058 (1976) 250 (19781979) 250 Deluxe (1978-1979) Olympique 300 (1971-early 1973) 300 (late 1973-1974) 300 300 335 335 (1975 and 1976 twin) (1976 single) (1970) (1971-1973)
Carburetor
Idle Speed (rpm)
HR-73A HR-133A HD-228 HR-136A HR-155A HR-165A HR-173A HR-143A (2) HR-161A HR-166A HR172A HR173A HR172A
11,4 CD Fixed 11 ,4 Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed
1,500-1,800 1,800-2,000 1,8002,200