The float is heavy because it has leaked and filled partially with gasoline or it has become saturated. If the float is heavy it will not stop the flow of gas into the float chamber at the correct level. This will cause the carburetor to dump a rich mixture into the combustion chamber. The engine will foul the spark plug quickly and use more fuel than expected.
It is in the float chamber of the carburetor.
The float is located inside the carburetor.
Have you checked to see if the float has a hole in it allowing fuel to weight it down? Possibly the needle valve is sticking and not the float. Could also be the float needs adjusting. You need to open the carburetor up and see what is going on.
Almost All engines with a carburetor have a float valve. The exception is a carburetor Built by Tillotson, horrible things but they worked upside down.
A bad, stuck or dirty float needle inside the carburetor.
Float may be sticking or have a hole in it.
98 Dodge van does not have a carburetor-it has a throttle body= no float
float valve or float are bad
What if your float is not floating? Food for thought... If your float has gone bad then it wil not give enough force to close the Float Valve. Get a new float. If this does not fix it then the float valve you got is defective.
The float bowl and the venturi tube
Inside the bowl-like affair at the bottom of the carb.
Usually a stuck float mechanism.