Well you don't say what the actual problem is except to say it "acts" like the float is stuck. Does it drip gas, flood the intake, die for lack of gas or what? Could be the choke linkage is set up wrong, could be the air intake is plugged somewhere so it acts like it is being choked, could be the float valve is sticking (on both carbs) could be dirty, plugged fuel line, filter, tank outlet. You can get a carb rebuild kit for about $30, well worth it. Really need to know the symptoms better to help.