Engine/Carb Data
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For Information Only
Check with an expert or your local ski-doo dealer to be sure!
Are these right?  If you know click here to clue me in and I'll update the information on this page.
Many thanks to Brian (Bones) and Gilles of Canada and Brian of New Hampshire for helping put these lists together.
Can anyone help with the ?s
Some Blizzard information can be found at:  Free Air ski-doo's--An Unofficial History

TABLE 1 -- 1960-1973 ski-doo Basic Data
TABLE 2 -- 1970-1980 ski-doo Tillotson Specifications
TABLE 3 -- 1975-1980 ski-doo Mikuni Specifications
 TABLE 4 -- Mikuni VM Carburetor Super Tuning Manual
 TABLE 5 -- Tillotson Service Manuals, Information Guides, and Parts Lists

1960 - 1973
Model Engine Carburetor
  Make Model Displacement

Make/Model
1960
K60 Kohler K161
7 HP (4 cycle)		 16.2 cu. in.

Carter Model N
1961
K61 Kohler K161
7 HP (4 cycle)		 16.2 cu. in.

Carter Model N
J61 JLO 8 HP (2 cycle) ? Tillotson HL233B

1962
A62 JLO L152 148cc Tillotson HL233B
K62 Kohler K161 16.2 cu. in. Carter Model N
J62 JLO L197 198cc Tillotson HL233B

1963
R-6 Rotax 165 163cc Tillotson HL233B
R? Kohler K161 16.2 cu. in. Carter Model N
R-8 Rotax 250 247cc Tillotson HL233B
RD-8 Rotax 250 247cc Tillotson HL233B

1964
AR-6 Rotax 165 163cc Tillotson HL233B
BR-9 Rotax 250 247cc Tillotson HL233B
RD-9 Rotax 250 247cc Tillotson HL233B

1965
Chalet Rotax 165 163cc Tillotson HL233B
Olympique Rotax 250 247cc Tillotson HL233B
Alpine Rotax 250 247cc Tillotson HL233B

1966
Olympique Rotax 250 247cc Tillotson HL233A
Super Olympique Rotax 250 247cc Tillotson HL209A
(Dual)    HL210A
Alpine Rotax 250 247cc Tillotson HL209A
(Dual)    HL210A

1967
Chalet Rotax 165 163cc Tillotson HL233A
Olympique Rotax 250 247cc Tillotson HL233A
Super Olympique Rotax 300 299cc Tillotson HR7A
Alpine Rotax 300 299cc Tillotson HR7A
Super Alpine Rotax 370 368cc Tillotson HD4A

1968
Olympique Rotax 250 247cc Tillotson HL233B
Super Olympique Rotax 300 299cc Tillotson HR7A
Super 370 Rotax 370 368cc Tillotson HD8A
Alpine Rotax 300 299cc Tillotson HR7A
Super Alpine Rotax 370 368cc Tillotson HD8A

1969
Olympique 12/3 Rotax 300 299cc Tillotson HR7A
Olympique 12/3SS Rotax 292 292cc Tillotson HD22A
Olympique 320 Rotax 320 318cc Tillotson HR17A
Olympique 320SS Rotax 340 335cc Tillotson HD22A
Olympique 370 Rotax 370 368cc Tillotson HD8A
Nordic 371 Rotax 371 368cc Tillotson HR16A
Alpine 370 Rotax 370 368cc Tillotson HD8A
Alpine 640 Rotax 640 635cc Tillotson HD21A
T'NT 399 Rotax 399 399cc Tillotson HD21A
T'NT 669 Rotax 669 669cc Tillotson HD21A

1970
Olympique 12/3 Rotax 300 299cc Tillotson HR37A
Olympique 335 Rotax 335 335cc Tillotson HR17C
Olympique 399 Rotax 401 399cc Tillotson HR16B
Nordic 399 Rotax 401 399cc Tillotson HR40A
Nordic 640 Rotax 640 635cc Tillotson HD20A
Skandic 335 Rotax 335 335cc Tillotson HR69A
T'NT 292 Rotax 292 292cc Tillotson HD22A
T'NT 340 Rotax 340 335cc Tillotson HD22A
T'NT 399 Rotax 400 399cc Tillotson HD21A
T'NT 640 Rotax 641 635cc Tillotson HD20A
Alpine 399R Rotax 399 399cc Tillotson HR16B
Alpine 399ER Rotax 399 399cc Tillotson HR16B
Invader 640ER Rotax 635 635cc Tillotson HD20A

1971
Elan 250 Rotax 247 247cc Tillotson HR73A
Olympique 300 Rotax 302 299cc Tillotson HR74A
Olympique 335 Rotax 337 335cc Tillotson HR75A
Olympique 399 Rotax 401 399cc Tillotson HR76A
Nordic 399 Rotax 401 399cc Tillotson HR40A
Nordic 640E Rotax 640 635cc Tillotson HD20B
Alpine 399R Rotax 401 399cc Tillotson HR16B
Alpine 640ER Rotax 640 635cc Tillotson HD20B
Valmont 399R Rotax 401 399cc Tillotson HR40A
Valmont 640ER Rotax 640 635cc Tillotson HD66A
T'NT 292 Rotax 292 292cc Tillotson HD22B
T'NT 340 Rotax 342 335cc Tillotson HD22B
T'NT 440 Rotax 435 437cc Tillotson HD73A
T'NT 640 Rotax 641 635cc Tillotson HD20B
T'NT 775 Rotax 775 771cc Tillotson HD20B
Skandic Rotax 337 335cc Tillotson HR69A

1972
Elan 250 Rotax 247 247cc Tillotson HR73A
Olympique 300 Rotax 302 299cc Tillotson HR74A
Olympique 335 Rotax 337 335cc Tillotson HR75A
Olympique 399 Rotax 401 399cc Tillotson HR76A
Skandic 335 Rotax 337 335cc Tillotson HR69A
Nordic 440 Rotax 434 437cc Tillotson HR112A
Nordic 640ER Rotax 640 635cc Tillotson HD20B
T'NT 292 Rotax 292 292cc Tillotson HD22B
T'NT 340 Rotax 343 339cc Tillotson HD98A
T'NT 400 Rotax 398 399cc Tillotson HD104A
T'NT 440 Rotax 435 437cc Tillotson HD83A
T'NT 640 Rotax 641 635cc Tillotson HD20B
T'NT 775 Rotax 775 771cc Tillotson HD20B
Valmont 440R Rotax 434 437cc Tillotson HD112A
Valmont 440ER Rotax 434 437cc Tillotson HD112A
Alpine 640ER Rotax 640 635cc Tillotson HD81A
1973
Elan 250 Rotax 247 247cc Tillotson HR133A
Elan 250T Rotax 248 247cc Tillotson HR136A
Elan 250SS Rotax 249 247cc Tillotson HR143A
Olympique 300  Rotax 302 299cc Tillotson HR132A
Olympique 340 Rotax 338 339cc Tillotson HR131A
Olympique 400  Rotax 401 399cc Tillotson HRA134A
Olympique 440 Rotax 434 437cc Tillotson HR135A
T'NT 294 Rotax 294 293cc Tillotson HR137A (2)
T'NT 340 Rotax 343 339cc Tillotson HD107A
T'NT 440 Rotax 435 437cc Tillotson HD109A
T'NT 340FA Rotax 346 339.2cc Tillotson HR149A (2)
T'NT 400FA Rotax 396 398.6cc Tillotson HD123A (2)
Nordic 640ER Rotax 640 635cc Tillotson HD110A
Skandic 335 Rotax 337 335cc Tillotson HR75A
Alpine 440R Rotax 434 437cc Tillotson HD108A
Alpine 640ER Rotax 640 635cc Tillotson HD110A
Valmont 440R Rotax 434 437cc Tillotson HD108A
Elite 440ER Rotax 434 437cc Tillotson HD128A
 

1970-1980 ski-doo Tillotson Carburetor Specifications
* Unless otherwise specified, idle speed is 1,800-2,200 RPM
** Tolerance for all adjustments is +1/8-0 Turn
Year Model Carb Low Speed Adjustment** High Speed Adjustment** Idle Speed
1970 Olympique 335 HR-176 3/4 1 1/4 *
1970 Olympique 399 HR-16B 3/4 1 1/4 *
1970 T'NT 292 HD-22A, B 3/4 1 1/4 *
1970 T'NT 340 HD-22A, B 3/4 1 1/4 *
1970 T'NT 399 HD-21A 3/4 1 1/4 *
1971 Elan 250 HR-73A 3/4 1 1/4 *
1971 Elan 250E HR-73A 3/4 1 1/4 *
1971 Olympique 300 HR-74A 3/4 1 1/4 *
1971 Olympique 335 HR-75A 3/4 1 1/4 *
1971 Olympique 399 HR-76A 3/4 1 1/4 *
1971 T'NT 292 HD-22A, B 3/4 1 1/4 *
1971 T'NT 340 HD-22A, B 3/4 1 1/4 *
1971 T'NT 440 HD-73A 3/4 1 1/4 *
1972 Elan 250 HR-73A 3/4 1 1/4 *
1972 Elan 250E HR-73A 3/4 1 1/4 *
1972 Elan 292 SS HD-22B 3/4 1 1/4 *
1972 Olympique 300 HR-74A 3/4 1 1/4 *
1972 Olympique 335 HR-75A 3/4 1 1/4 *
1972 Olympique 399 HR-76A 3/4 1 1/4 *
1972 T'NT 292 HD-22A, B 3/4 1 1/4 *
1972 T'NT 400 F/A HD-104A (2) 3/4 1 1/4 *
1972 T'NT 440 HD-83A 1 1/4 1 1/4 *
1972 T'NT 640 HD-98A 1 1/8 1 *
1973 Elan 250 HR-133A 3/4 Fixed *
1973 Elan 250 (Early 1973) HR-73A 3/4 1 1/4 *
1973 Elan 250 SS HR-143A (2) 3/4 Fixed *
1973 Elan 250 T HR-136A 3/4 Fixed *
1973 Elan 250E (Early 1973) HR-73A 3/4 1 1/4 *
1973 Olympique 300 (Early 1973) HR-74A 3/4 1 1/4 *
1973 Olympique 300 Late 1973) HR-132A 3/4 1 *
1973 Olympique 335 HR-75A 7/8 1 1/16 *
1973 Olympique 340 HR-131A 3/4 Fixed *
1973 Olympique 400 (Early 1973) HR-76A 1 1 1/16 *
1973 Olympique 400 (Late 1973) HR-134A 3/4 Fixed *
1973 T'NT 294 HR-137A (2) 3/4 Fixed *
1973 T'NT 340 HD-107A 7/8 Fixed *
1973 T'NT 340 F/A HR-149A (2) 1 1 1/8 *
1973 T'NT 400 F/A HD-123A (2) 1 5/8 *
1973 T'NT 440 HD-109A 1 1 *
1974 Elan 250 HR-133A 3/4 Fixed *
1974 Elan 250 Deluxe HR-155A 1 Fixed *
1974 Elan 250 T HR-155A 1 Fixed *
1974 Elan 294 SS HR-161A 3/4 Fixed *
1974 Olympique 300 HR-132A 3/4 1 *
1974 Olympique 340 HR-131A 3/4 Fixed *
1974 Olympique 400 HR-134A 3/4 Fixed *
1974 Olympique 440 HR-135A 7/8 Fixed *
1974 T'NT 300 HR-164A 1 1 *
1974 T'NT 340 HD-134A 1 1 *
1974 T'NT 340 F/A HR-149A (2) 1 1 1/8 *
1974 T'NT 400 F/A HD-123A (2) 1 5/8 *
1974 T'NT 440 HD-138A 1 1 *
1974 T'NT 440 F/A HRM-3A (2) 1 1 1/4 *
1974 T'NT Everest HD-138A 1 1 *
1975 Elan 250 HR-133A 3/4 Fixed *
1975 Elan 250 Deluxe HR-165A 1 Fixed *
1975 Elan 300 SS HR-166A 3/4 Fixed *
1975 Olympique 300 HR-169A 1 Fixed 1,500-1,800
1975 Olympique 340 HR-170A, B 1 Fixed 1,500-1,800
1975 T'NT 340 HD-134A 1 1 *
1975 T'NT 340 F/A HR-168A (2) 1 1 1/8 *
1975 T'NT 440 HD-138A 1 1 *
1975 T'NT 440 F/A HRM-5A (2) 1 1 *
1975 T'NT Everest HD-138A 1 1 *
1976 Elan 250 HR-173A 1 Fixed *
1976 Elan 250 SS HR-172A 1 Fixed 1,500-1,800
1976 Olympique 300 Single HR-174A 1 Fixed 1,200-1,500
1976 Olympique 300 Twin HR-169A 1 Fixed 1,500-1,800
1976 Olympique 340 HR-170A, B 1 Fixed 1,500-1,800
1976 Olympique 440 HR-135A 7/8 Fixed *
1976 Olympique 440 Plus HR-176A 1 Fixed 1,500-1,800
1976 T'NT 340 HD-148A 1 1 1,500-1,800
1976 T'NT 440 HD-147A 1 1 1,500-1,800
1976 T'NT Everest HD-147A 1 1 1,500-1,800
1978 Elan 250 HR-173A 1 Fixed 1,800-2,000
1978 Elan 250 Deluxe HR-172A 1 Fixed 1,800-2,200
1979 Elan 250 HR-173A 1 Fixed 1,800-2,000
1979 Elan 250 Deluxe HR-172A 1 Fixed 1,800-2,200

 

1975-1980 ski-doo Mikuni Carburetor Specifications
Year Model Carb E-Ring Position
(From Top)		 Air Screw
(+or- 1/4 Turn)
1975 T'NT R/V 245 VM 34-72 2 1
1976 Olympique 300-300E Kit VM 34-103 3 1
1976 Olympique 340-340E Kit VM 34-104 3 1
1976 Olympique 400 Plus Kit VM 32-117 3 1.5
1976 T'NT 340-340E Kit VM 34-109 3 1
1976 T'NT 440-440E Kit VM 34-105 2 1
1976 T'NT R/V 250 VM 34-93 2 1
1976 T'NT R/V 340 VM 34-94 2 1
1977 Everest 340-340E Kit VM 30-98 3 1.5
1977 Everest 440 VM34-110 3 1.5
1977 Everest 440 L/C VM34-150 4 1
1977 Everest 440E VM34-110 3 1.5
1977 Olympique 300 Twin VM 30-90 3 1.5
1977 Olympique 340-340E VM 30-91 3 1.5
1977 Olympique 440 VM 32-113 3 1.5
1977 T'NT 340 F/A VM34-118 3 1
1977 T'NT 440 VM34-110 3 1.5
1977 T'NT 440 F/A VM36-53 2 1
1977 T'NT Cross Country VM34-199 2 1.5
1977 T'NT R/V 340 VM34-135 4 1
1978 Blizzard 6500 Plus VM34-184 4 1.5
1978 Citation 300 VM30-94 3 1.5
1978 Everest 340-340E Kit VM 30-98 3 1.5
1978 Everest 440 VM34-165 3 2
1978 Everest 440E VM34-165 3 2
1978 Everest 444 L/C VM34-150 4 1.5
1978 Olympique 300 Twin VM 30-90 3 1.5
1978 Olympique 340-340E VM 30-91 3 1.5
1978 T'NT 340 F/A VM34-118 3 1
1978 T'NT 400 F/C VM34-165 3 2
1978 T'NT Cross Country VM34-199 2 1.5
1978 T'NT R/V 340 VM34-135 4 1
1979 Blizzard 5500 VM34-103 3 1.5
1979 Blizzard 7500 Plus VM34-199 2 1.5
1979 Blizzard 9500 Plus VM36-78 4 1
1979 Citation 300 VM30-104 3 1.5
1979 Everest 340-340E Kit VM 30-98 3 1.5
1979 Everest 444 L/C VM34-150 4 1.5
1979 Olympique 340-340E VM 30-91 3 1.5
1980 Blizzard 5500 VM34-103 3 1.5
1980 Blizzard 7500 Plus VM34-199 2 1.5
1980 Blizzard 9500 Plus VM36-78 4 1

 

Mikuni VM Carburetor Super Tuning Manual (PDF Format)

1.  Right click the hyperlink below.
2.  Save Target As menu comes up.
3.  Select where you want to save it and download it (about 1.2MB)--it's worth it!

Mikuni VM Carburetor Super Tuning Manual