Re: Fuel Boiling Out Of Carburetor

Posted by Owen_Dyneto On 2015/9/7 11:47:46

For those who might not understand the function of the anti-percolator valves, they prevent or minimize flooding from heat-soak. They vent when the throttle is closed to prevent any heat-soak from percolating the fuel in the bowl which would otherwise be forced thru the main jets and into the manifold and engine. Less elegant designs just use a simple clapper valve over the float bowl, yet others have no valve at all but a vent tube extending into the carburetor throat above the venture. Earlier carburetors like the Stromberg EE-22 and 23 simply have a little maritime-style scupper valve and cap on top of the fuel bowl chamber with a baffle on the underside. But they are all for the same reason. As far as I know they are not necessary on updraft carburetors.