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According to the manufacturer of the boost pumps, the electric boost pumps are made for continuous operation. I do not worry about using them to suppress vapor. That's one BIG reason they are there. I've been using one like that for a loooong time. Not yet had one fail, but I've stopped a lot of vapor problems by using it. Allowing vapor lock to continue has the same effcet as leaning the mixture inappropriately. That can destroy cylinders.
We know what the problem is. Insulating fuel lines won't hurt, but is not the answer. It's the engine -driven fuel pump being too hot. It is insufficiently baffled. We're working on an STC'd solution. Cool the pump and there will be no problem (easier said than done). Use the boost pump and the problem will be lessened.
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Walter Atkinson
Advanced Pilot Seminars
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