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How Do I Know If I Have Air Screw Or Fuel Screw? [Solved]
The air screw is on the side of the carburetor and meters the amount of air that makes it to the pilot-jet nozzle. A fuel screw is located underneath the float bowl and meters the amount of fuel that makes it to the carb’s main body.2 Oct 2017
Air/fuel screw and Air screw explained (TAGALOG)
Air
Idle mixture adjustment (air OR fuel screw adjustment) Carburetor
2:20 this is an edited shot, 2 turns is just an example, your results may vary.