So....
My snow blower wouldn't start one morning and I discovered no fuel through the carb. Knowing that it had been used in slushy conditions I put a hair dryer on it for 4 minutes to see if there might be ice in the line/carb. when I came back out gas was flowing through carb onto floor. I took carb off twice, had my carb guy clean it, both times when reinstalled it continued to overflow fuel. Float was checked, float pin was replaced.

Here's where I am baffled, I ordered and installed a new carb through Toro, same darn issue. New carb overflows the same as the old one. The new carb has a plastic nonadjustable float but shuts fuel off fine when I take the bowl off and manipulate the float by hand.

 

Tie up the float with a string or rubber band to shut off the fuel. Then let it sit like that for half an hour or so. Thinking the fuel may be leaking before it gets to the carb. If the fuel is shut off by the float and the float bowl is fitting properly the leak must be elsewhere.