Bob, I don't have the diagram you want, but do suggest that you close the fuel valve from the header tank to the carbureator and that will tell if the fuel is returning through the fuel pump. If it is, the fuel pump has a problem. The valves in the fuel pump are not sealing. Lee Browning
-- [EMAIL PROTECTED] wrote: Does anyone out there have a good copy of the Alon A2 fuel system piping layout that is a little more understandable then the one in the owners manual, It is a little confusing and unclear exactly where some of the lines go. My problem is that all the fuel in the header tank is draining back into the wingtanks over an extended period of time. The plane has an electric fuel pump rather then an engine driven pump. It looks like the only route the fuel could follow to drain the header tank is back through the pump. Is there a check valve anywhere in the system to prevent fuel back flow to the wing tanks. There is no standpipe in the header tank. The return line is "T" ed off the back of the header tank. Any input would be appreciate Bob Bullock [EMAIL PROTECTED] 1966 ALON A2 N5621F Maryland More new features than ever. Check out the new AOL Mail! _____________________________________________________________ Click to get information on owning your own franchise. Great products. Low entry cost. http://thirdpartyoffers.juno.com/TGL2111/fc/Ioyw6iigjt3FOt9EsiZNN6yatWpnmMJASZiRqMyD7ZRGf3hl2Zi2Zz/
