It is possible but not very common.
Usually a bad carb will cause a non-start issue or it will shut off within minute or two if it has a stuck float valve causing it not to get gas.
A bad, stuck or dirty float needle inside the carburetor.
Carburetor float is stuck open.
Dirty or stuck open needle valve in carburetor.
Your lawn mower may be leaking gas from the carburetor due to a faulty carburetor gasket, a damaged fuel line, or a stuck float valve. It is important to address this issue promptly to prevent potential safety hazards and damage to your lawn mower.
Stuck floats or dirty needle valve.
Several things could make a carburetor backfire. The engine could be out of time. the carburetor could have a stuck float, or the engine could have a stuck valve.
A lawn mower may leak gas from the air filter due to a carburetor issue, such as a stuck float or needle valve. This can cause excess fuel to flow into the air filter, leading to leakage. It is important to address this issue promptly to prevent potential safety hazards and damage to the lawn mower.
It is probably a stuck needle valve for the float. Look under the carburetor for a round metal bowl with a bolt on the bottom. Unscrew the bolt and try to move the float up with your finger.
If by "overloading" you mean flooding (too much fuel), two reasons are (1) the carburetor needle valve is "wide open" or the float is stuck in the open position.
If you have fuel coming out of your air filter, then your carburetor bowl float is most likely gummed up an stuck. try tapping on the bowl, or you my need to take it off an clean it and the needle jet. How do you adjust air/fuel mix on a lawn mower motor?
Look for a crack on the fuel tank. If the system is garvity-fed (fuel tank is not attached to the carburetor and is above the carburetor level) look for cracks in the fule hose. Another likely possibility in a gravity-fed system is the fuel float stuck in the open postion, thus not stopping the fuel flow through the carburetor when the engine is off.
The starter is stuck.