I have a quick question for anyone that knows. It's concerning the air screw and whether it's upstream or downstream of the throttle valve. Does turning the air screw out (counter-clockwise) lean or richen the fuel in the air-fuel mixture??

 

>>>Does turning the air screw counter-clockwise) lean or richen the fuel in the air-fuel mixture?? <<<

It leans it out

 

Thanks Thor.