These comments explained it perfectly. And to add, the 1 1/4 turns out are a basic starting point for a carb to get the equipment/vehicle to run so once warm, you can fine tune from there. Turning in leans it, turning out fattens it.
I like to tune mine with just barely enough idle to get it to run. Basically turn out the idle screw so it isn’t touching the throttle and then turn in until you just see it open it.
I like to tune mine with just barely enough idle to get it to run. Basically turn out the idle screw so it isn’t touching the throttle and then turn in until you just see it open it.