1940 356 with Stromberg AAV-26 mystery

Posted by Bill Butterworth On 2014/8/13 13:19:36

For those who recall my previous threads on starting problems, finally resolved half of the problem, poor ground between point base and distributor base plate the other being massive fuel over feeding using subject carburetor. Have been have advised to go to a Carter as they also have had over feeding with Stromberg carburetors of this era. Feel I have an excellent under standing of this model Stromberg and have been unable to resolve problem. Even went so far as to start engine with fuel line plugged and air horn removed so I could observe what was going on with fuel level, (I know this is dangerous and one has to be careful and prepared in case of flair up). First, manually filled carburetor to inspection plug. Let set for and while to be sure there was not a leak, level stayed consistent. Even removed economize valve and installed a plug. Both the idle jet and main jet air bleeds are clear so no siphoning. Main jet ID's are even slightly below spec. at .048". Accelerator pump circuit works properly. Has anyone else had this problem and been able to determine source of massive fuel feed?