I have a 5HP Quantum, the engine had not been run in quite awhile. I took the carb off and it had lots of nasty stuff in it and the needle valve was stuck. I got a carb kit and cleaned the carb up inside and out and installed a new needle and seat. The engine runs good now but the carb runs over when the engine is shut off. I presume the float is not set correctly. How do you set the float on this carb? The float is plastic so I don't see how you can bend the part that touches the needle valve. Oh I forgot to say that I checked the float and it "floats".