ORIGINAL: dertwosubsw2
I have a three line tank. I have one line going into the carberator, one into the exhaust, and on that is capped off where I fill the tank. One other odd thing is I can fill the tank but I can not pump the fuel out. Has anyone had this situation before? Any help would be greatly appreciatted?
How is that third line plumbed does it also have a clunk on it? Does it have a brass pipe that goes to the rear bottom of the tank? Or is there just a straight and short tube that only just goes through the bung and stops?
If its like that last you will not be able to completely empty the tank from the fill third line. A three line system on an airplane with an exposed engine like that with only cheek cowls is overkill and only adds unneeded complexity. Its to late now since you already punched the third hole in your tank but do consider for those airplanes like that on the next one a very simple two line system with a break in it.
What Ratshooter is saying about checking the clunk for being pinched forward is dead on and checking all airplanes for a pinched internal clunk is the first order of business when a firm arrival has occured.
John