Thread: leaking carb.
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Old 01-23-2013, 08:54 PM   #3
Tom Endy
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Join Date: May 2010
Location: Southern California
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Default Re: leaking carb.

If the shut off valve does not have a positive shut off you then have to rely on the float valve holding. This is not always possible. A little piece of rust from the gas tank can off-set the valve. Best to replace the shut off valve.

If you are going to rely on the float valve you should consider the following:

1. A viton tip float valve works best.

2. The float level has to be set accurately. If the fuel level rises much above the 5\8" set point it will spill over the top of the main jet and the cap jet and fuel will run down into the throat of the carburetor, exit through the small drain hole and run back to the hex nut under the main jet and drip in the floor.

3. If the float has been molested by someone trying to adjust the float level it may not come up straight and it will cock the float valve causing it not to seat properly.

Tom Endy
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