Quote Originally Posted by joeg View Post
"Oh and the carb issue has been handled a long time ago with new rubber gasket compounds"

Really? for my particular model Weber? Don't think so...
What "rubber" parts in your carburetor are there other than the o-rings around the idle jet holders ? The O-rings would be easy to match up with ones of compatible material if the existing ones swell or deteriorate when tested in E85. The accelerator pump is not rubber any more and the paper gaskets are not an issue.