Hello if you haven't bent the float rod, I would suspect a saturated float or a bad needle valve/seat, seal. Mark Shaw has a great idea how to update/seal the cork float for the new (rotten) gas. As far as the seat/needle valve, I would remove the brass supply line to the carb after you drain the bowl and find a similar hose barb fitting and screw it into the bowl. Then attach some tygon hose to the barb fitting, now gently blow into the hose and see if the seat/needle stops your effort. Good Luck