----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----
Hhm. >From what I read, it seems that the fuel lines of the pump are reversed. It is easy to attach the hoses the wrong way. The effect would be that on climb the header tank is being pumped empty to a certain amount and the fuel will be pumped into the main tanks. That would explain loosing so much fuel on climb out trough the mains. When the plane levels in flight, the pump will not get any fuel anymore, because the line that actually fills the header tank is somehow in a higher position of the header tank. So your pump pumped air while you were luckily finding your landing spot. I would check the routing of these hoses before coming to the conclusion that the pump is dead. Hartmut N3330H ----- Original Message ----- From: "Ed Burkhead" <[EMAIL PROTECTED]> To: <NORG>; "Ctech" <[email protected]> Sent: Sunday, October 23, 2005 11:54 PM Subject: RE: RE: [COUPERS-TECH] Cross-Country Glitches > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > > James wrote: > >So why did you infer the fuel pump is not bad? > > > > James, > > It does seem like you have a multiple-things-wrong situation. > > The fact that the fuel siphons out of the wing tanks, emptying them and > allowing you to run low on the fuselage tank implies nothing about the fuel > pump failing. > > If you blow all the gas out of the wing tanks you'd get the same symptoms > with a perfect fuel pump. > > Lynn Nelson who responded to you is an A&P and Coupe owner. He works on > Coupes a lot, too. > > Beware of fuel pumps. The arm that goes in to the cam (?) is different on > some different engines. A fuel pump from the C-75/85 will not work on a > C-90 for example. The arms are different. I don't know about the O-200. > Damage could result, from what I've heard. My knowledge level on this is > hearsay. Listen to experts and ask about my concerns to check if I was > right to worry about something. > > Ed Burkhead > http://edburkhead.com > ed -at- edburkhead???.com (change -at- to @ and remove "???") > > -----Original Message----- > From: jlsNS [mailto:[EMAIL PROTECTED] > Sent: Sunday, October 23, 2005 3:33 PM > To: [EMAIL PROTECTED] > Subject: Re: RE: [COUPERS-TECH] Cross-Country Glitches > > > > > > From: "Ed Burkhead" <[EMAIL PROTECTED]> > > Date: 2005/10/23 Sun PM 03:27:12 EDT > > To: "'jlsNS'" <[EMAIL PROTECTED]>, > > "Ctech" <[email protected]> > > Subject: RE: [COUPERS-TECH] Cross-Country Glitches > > > > > > James, > > > > Yep, I have felt that jolt of fear from a dropped nose tank wire. It's > > worth adding that into your second tier of instrument scans - the ones you > > do every 2-5 minutes. > > > > The smart guys will give you good information on debugging this but I've > got > > a question: Why do you think you need a new fuel pump? From your > > description I don't see any fuel pump problems. > > Imho, it sure died. Another mechanic and I tried to prime it, to get it to > work. It wouldn't--- mixture set full lean, mags off, starter twirling > the prop --- no fuel a-pumping. We trouble-shot it in every way you would > try it and it wouldn't pump fuel. And yes, we assured the lines were clear > and they were. The wing tanks still had plenty of fuel. We removed the > nosebowl and took the top off the pump for testing. The pump's diaphram > moved up and down with the prop turning, showing that the cam was doing its > duty by wobbling the arm. We figured the check-valves were stuck. What do > you figure? > > So why did you infer the fuel pump is not bad? And now from what I've been > reading by googling all over the place (except in ercoupers.com because it's > apparently 404 today), we're beginning to suspect that the reason for the > gas pouring out around the filler lid during climbout is attributed to a bad > flow restrictor in the pump. The owner says the aircraft at one time did > not spill fuel in flight. > > Thanks for the e-mail. > > > > Ed Burkhead > > http://edburkhead.com > > ed -at- edburkhead???.com (change -at- to @ and remove "???") > > > > > > > > > ============================================================================ == > To leave this forum go to: http://ercoupers.com/lists.htm > Search the archives on http://escribe.com/aviation/coupers-tech/ > > > > ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
