1970-1979 Ski-Doo Snowmobiles Service Manual, Page 108Get this manual
FUEL SYSTEM 8Install float guides in float chamberMove floats up and down several times to ensure that they are not binding on float guides9Inspect float arm and float pin to ensure that float arm does not bind on pin10Inspect choke plungerPlunger must move freely in passage of mixing chamber11Install throttle valve in mixing chamber body and move several times up and down to check for sticking motion or wearEnsure that guide pin in mixing chamber body is not broken
3Place washer on inlet needle valve seat and install seat in mixing chamber body (Figure 17)Install inlet valve (point down) and retainer4Install float arm and secure float arm with float arm pin5Invert carburetor bodyEdge of mixing chamber (Figure 18) must be 23-24mm (0.90-0.94 in from float armAdjust if necessary by bending float arm actuating tab