Lawn Mower Carburetor Leaks Gas

My 17 hp Briggs and Stratton lawn tractor floods upon initial startup. The gas will gush from the top of the carburetor. I have to blow out with shop air to get started. Once you get it going, it will run good rest of day.


By CJ Santee

June 17, 20100 found this helpful

Could be the float or the needle that allows the fuel to come down is stuck open. Sometimes the float has a pin hole leak and it fills up inside with gas and opens the needle which allows all the fuel to come in the carb. The seat if it's worn down or dirty will not allow the fuel to shut off so it continues to flow.

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June 15, 2010 Flag
0 found this helpful

I have a Craftsman Riding mower LT1000, 42 in. cut, 2007 model. It is leaking gas into the bowl where the carburetor is. The gasket is sealing, it's not leaking out there.

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September 24, 2009 Flag
0 found this helpful

I cleaned the carburetor and reassembled it. Then the mower started and I let it run for about 10 minutes.

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