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![]() "Bart Senior" wrote: For some reason the engine would start, but die when given some throttle, or simply quit after a few minutes of operation. It started fine every time. I checked the cut off valve and it was good. After thinking about it tonight, I decided it must be the in-line electric fuel pump I added to help bleed the system. I think if I pulled it out, the problem will go away. We'll see. Sounds like your fuel system may have a small leak that is sucking in air when running. Sometimes air will leak into a tiny flaw where fuel not leak out. Most of the time, if there's a leak, it will leak enough to spot up a paper towel. This is less trouble than blanking it off and pressurizing with air for a soap bubble test. Steve Daniels wrote: You can keep it, but cut it out of the system for normal operation. This will look better in a fixed pitch font. _____________________ | | | | A X C D B X ________|____X__P___X________|_______ In the above, lines are fuel lines. X is a valve, and P is your electric pump. During normal operation, valves A and B are open, and valves C and D are closed. When you want to use the electric pump for bleeding, reverse the valves. You mean put in a bypass... if it's a centrifugal pump, he doesn't really need a bypass (although it's nice to have one). He just needs tight connections! I just found out this week that a fuel leak I thought I'd fixed is still there (but much smaller, so I at least did it some good). Some of the connections are in difficult places to reach. What kind of fittings, what kind of hose, Bart? I happen to like flares but a lot of people like compression fittings of one type or another. I have worked with flare fittings on hi-pressure air, hydraulics, various gasses, and other stuff, for about 30 years and the biggest problem I've had in over ten years has been our own fuel system! Fresh Breezes- Doug King |