1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 223Get this manual
FUEL SYSTEM-CARBURETED MODELS
When the throttle is completely open, the amount of fuel drawn into the air stream is limited by the size of the main jet (Figure 7)The changes from the idle mixture circuit to the intermediate (jet needle) range to high speed (main jet) is transitionalStarting Enrichment
to the full choke position to enrich the air-fuel mixture for starting
RemovaVInstallation
NOTE Carburetors are often different for the left, right or center cylindersThe carburetors should be marked to indicate the original cylinder locationParts should be similarly marked as they are removedA simple way is to apply different colored mark to the the parts for each location
Choke lever (Figure 8) located on the control console operates the starting enrichment systemWhen the engine is cold, move the choke lever