nytrdr24
+1y
yeah, there is a fuel mixture screw, and also an idle mixture screw.
set the mixture screw inbetween where it wants to kill the motor (screw in & screw out) there will only be @ 1 1/2 turns inbetween in and out of the screw.
then with a slight load on the engine (run the a/c) set the idle mixture so that it idles between 600-900rpm with the choke disengaged. you want the idle mixture right, then if you are adding say a turbo/supercharger you could adjust the fuel mixture screw to feed more fuel to prevent the lean condition.