kilobravo3 Posted July 13, 2011 Report Posted July 13, 2011 Hi Gang, I hadn't flown my 'F' for about 4 weeks (weather + traveling prevented it). I went to the airport earlier this week for a flight and had something strange happen that I've never seen before. As I was going through my start procedure, I turned on the electric boost pump and waited for pressure to come up before pushing the mixture in for 5 seconds. However, the fuel pressure never came up. The pump was running, but it was not supplying fuel. I let the pump run for about 15 seconds with no change. I then decided to try and start the engine in case it was just a gauge issue, and the engine did not fire. However, after the start attempt, the fuel pressure came up, and then I was able to prime and start as usual. It concerned me a bit since this is the first time I've ever had something like this happen in any airplane I've flown. I did verify that after engine start turning on the boost pump did in fact increase pressure, so the pump seems to be working fine (I just installed a rebuilt fuel pump about 2 months ago). Does this sound like anything I should be concerned about moving forward, or was there just some strange air lock in the fuel line before the pump?
clh Posted July 13, 2011 Report Posted July 13, 2011 I have seen similar to that twice on my M20E. It was when it had been sitting a while (1+ weeks) and was on a low tank level. I think they may "lose prime" if they set too long.
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