air screw adjustment

[bpimpdaddy21]

could someone explain te me how to adjust the air screw, and how you know it is adjusted right, im a bit confused on that, but everythin else is ok, just unsure about the air screw. Thanks in advance.

[bpimpdaddy21]

Anyone help me out or point me in the right direction?

[White_Knuckles]

The fuel screw (air on other carbs) adjusts the idle mixture only. Average factory setting is 1 and 1/2 turns out from gently seated. Turning out richens, in leans. With a pilot jet changed up to a 40 the setting may be from 1 and 1/2 to 3+ out considering your flow mods.

The T-4 may pop on quick throttle let-off (deceleration), turning out the fuel screw will help eliminate the lean popping but will never cure it completely.

At a low idle try moving the screw out slowly a 1/4 turn from 1 and 1/2 listening for RPM pick up as you come out slowly keep going and it will start to stumble (too rich) find the smoothest idle point with the least roll-off backfire.

Then you'll have it "right".