My Massey 30 always ran great and would start if the battery could turn it over a couple times no matter how long it had been sitting. The power company was repacing some poles a couple weeks ago and had the electricity shut off, so I fired up my 30 that was hooked to my generator and it was purring along. Then it started run poorly and was belching lots of black smoke, so I shut it down. It was flooding, so when I took the air cleaner hose off, gas ran out. I took the Marvel Schrebler TSX308 carb off and opened it up. The float had a sloshing sound when I shook it, so I ordered a new float and carb kit. I soaked the carb in carb cleaner and blew it out. The directions said to set the float 1/4" from the gasket surface which I did. I put it back together with a new needle and seat, gaskets etc. When I put it on the tractor and turned the gas on, it filled up, then started leaking gas out of the air intake. I assume the float is too high and not shuting the gas off, but it is set correctly and with a new float it is doing the same thing as with the old one, so that makes me think I am missing something. I would appreciate any help you can give me. Thanks!!