Call them what you want they adjust the fuel / air ratio or air / fuel ratio. If you google either or "pilot air screw" or "pilot fuel screw" you'll get the same pictures ! I just happen to use MINE to adjust the air / fuel and NOT the fuel / air mix.
Yes I know they are the "D" head style , I have the bit. there is barely clearance for the adjustment on the left side carb.
Last edited by Gr8lite; 08/16/2019 2:08 PM.
