Itís actually called a needle.
I bring that up so if you order parts
99% of the time the only thing that can happen to a float is it fills with fuel. Some floats are hollow metal, some hollow plastic, those you can shake to tell if there is fuel in them, some floats are solid plastic, sort of like foam filled, and those you can only weigh, if you know what their weight is supposed to be. Usually those I go by feel and just guess.
However I suspicion your problem is a fuel pump
check valve that is slowly leaking and allowing fuel to drain back to the tank, then when you manually pump
the squeeze bulb, you put enough pressure on the float and needle valve that it allows fuel into the carb and flood the engine. That part is normal, you can do that on most if not all motors if you pump too hard and or too long. Of course an old needle can aggravate this as most have a neoprene tip that helps seal, it gets old, turns hard and often does leak a little.
Read up on adjusting float height too, itís easy to do and easy to accidentally bend the little tab and get it off and not realize it too.
the fuel pump, being sure to replace the check valves and maybe put the diaphragm
in spare parts
, cause it will eventually give up the ghost, of course right when you need it the most.
Maybe check the float if itís a hollow one by shaking. Metal ones are old school
, and those can be repaired by desoldering the weep hole that is soldered shut, draining the fuel and resoldering the float.
I had to do that on the carb on my 1946 Cessna, cause those havenít been made in a long time.