The Ford Barn

Purdy Swoft · 02-25-2014, 01:10 PM

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If you are talking about the vent hole on the left or engine side of the carburetor, the problem will be with the float valve or a hole in the float. It can be float level, gasket under float valve, loose float valve, trash in float valve or a faulty float. Yes there are aftermarket viton tipped needles. With real gas viton tipped needles are very good. Ethanol adultrated fuel swells rubber parts and causes the viton tipped needle to stick closed. I've replaced several for that reason. If you are referring to a drip at the small hole under and in front of the choke, the problem could be too short jets under the venturi or too many gaskets under the main jet. any problem that causes the level of the fuel to rise above the level of the jets under the venturi will cause a leak.

02-25-2014, 01:10 PM	#6
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: Gas leak from Zenith carb vent hole Sponsored Links (Register now to hide all advertisements) If you are talking about the vent hole on the left or engine side of the carburetor, the problem will be with the float valve or a hole in the float. It can be float level, gasket under float valve, loose float valve, trash in float valve or a faulty float. Yes there are aftermarket viton tipped needles. With real gas viton tipped needles are very good. Ethanol adultrated fuel swells rubber parts and causes the viton tipped needle to stick closed. I've replaced several for that reason. If you are referring to a drip at the small hole under and in front of the choke, the problem could be too short jets under the venturi or too many gaskets under the main jet. any problem that causes the level of the fuel to rise above the level of the jets under the venturi will cause a leak.