My AD-21 runs great for a few minutes after bleeding all the air out. Then dies. There is a large filter installed, roughly 6" diameter. After the engine stops I have removed the filter from it's canister and found it virtually empty, as if fuel isn't being drawn out of the tank to replenish that going to the engine. I have removed and replaced the delivery lines and made sure there are no air leaks. Possible lift pump diaphragm failure?
I also installed an electric pump after the large filter to aid in bleeding, but have read that if the diaphragm is damaged, using the electric pump will do damage. Help!
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AD-21 fuel bleeding problem
Moderator: Jeremyvmd
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Mark Deeser
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Re: AD-21 fuel bleeding problem
Could be clogged fuel pickup in tank, worth a check see. Thanks, Mark.