I wouldnt deviate from factory specs for the float. This will upset the other functions of the carb. As stated before make sure the float is not leaking(usually if they are they will have gas in them) Adjust it for height and drop,make sure it doesnt rub on the sides if the bowl. Turn the lid upside down and suck on the inlet fitting,,it should be sealed. If you still have trouble I would suspect rust or other crap in the fuel.
