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Join Date: Mar 2000
Location: So. Jersey
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Re: Question on fuel drainback from carb
There is such a thing as a check valve. They come in all shapes and sizes, I'm sure there is one made for the size of fuel lines and being compatible with fuel. I think some of the problem is fuel draining back the return line. I would hesitate to put a check valve in this line because a check valve does require a little pressure to open up, not eunough in the return line or else it will shut off hte line all together. Personally I'm going to put an electric pump in one of these days, either operated with a momentary switch just during starting or I'll go the whole nine yards and have it operate all the time with an oil pressure switch. The oil p. switch is in case the engine stalls you don't have fuel being pumped into the carb, float valve might be forced off seat and fill engine with fuel.