1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 85Get this manual
CARBURETION (1NALBRO) ponents in position and secure in place with retaining ringSlide the choke shaft into the mounting hole and over the friction spring and ballContinue to push the choke shaft through the carburetor body and into positionRotate the throttle shaft and install the circular throttle valve between the split section of the throttle shaftNOTE: Small hole in throttle valve must be positioned at the bottom of the carburetor throat and face toward the engine mounting side of the carburetorSecure the throttle valve in place with screw and star washerRotate the choke shaft and install the choke valve between the split section of the choke shaftNOTE: Cut-out in choke valve must face toward the top of the casting and the number in the throttle valve must face toward the outside of the carburetor bodySecure the choke valve in place with screw and star washerPosition the carburetor with choke side facing upwardInsert the choke friction spring and ball through the small hole located over the choke shaft mounting hole7