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Reply to "Carburetor Leaking"

Proper fuel tank venting is important, even if the floats and needle valves are perfect. If there is a one way valve in the vent line (lets air in as fuel is used, will not let air/vapor out)  you can build up pressure in the tank if fuel volume is low, ambient air is cold while turned off, and then ambient air (and the tank) get hotter before a restart. the hotter vapor in tank tries to expand, can't, pressure builds, enough to defeat the float/needle valve. gas floods carb and goes wherever. can fill the crankcase, and that is an interesting experience if you fire it up and try to drive it.  Ask me how I know.

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