* The air filter is clogged. This is the most common cause of a carburetor blowing air out. When the air filter is clogged, it restricts the flow of air into the carburetor, which can cause the carburetor to become too rich and blow air out.
* The idle mixture screw is set too rich. The idle mixture screw controls the amount of fuel that is mixed with the air at idle. If the idle mixture screw is set too rich, it can cause the carburetor to blow air out.
* The float is set too high. The float controls the level of fuel in the carburetor. If the float is set too high, it can cause the carburetor to flood and blow air out.
* The accelerator pump is not working properly. The accelerator pump is a device that squirts fuel into the carburetor when the throttle is opened. If the accelerator pump is not working properly, it can cause the carburetor to blow air out.
If you are not sure what is causing your carburetor to blow air out, it is best to take it to a qualified mechanic for diagnosis and repair.
