Richard - I had the same problem -fixed it... What fixed mine was that the bolt on the top of the fuel pump (the one that needs new washer when you change the gasket under the top at each annual)has to be tightened to more than the torque value called out to get the ring gasket to seal. It appears, that if there is a slight bit of air leak on either the top or the washer under the head of the top bolt, fuel leaks back to the wing tanks. Just get the kit from Skyport, which is a plastic envelope with a small grey fiber (?) washer to put under the bolt and a rubber-and-cork ring gasket to put under the fuel pump cap. Tighten the top bolt to the recommended torque value (I can't remember - anybody know?), then give it just a little more. Don't strip it by "leaning on it"! When you get a good seal, I'm betting it won't leak back. Mine didn't! -Ron Black N93394 #717
--- In [email protected], "Richard Green" <rgre...@...> wrote: > > My header tank appears to lose fuel even when the fuel valve is shut off, so > its a good bet header fuel valve isn't sealing well. Over 3-4 days the fuel > level in the header tank goes down slowly. No evidence of any big leaks but > the area around the carb looks very slightly wet. Of course its hot here in > TX so at slow leak rate I am sure most is evaporating pretty quickly. Anyone > have a similar problem? Anyway to adjust the valve closure other than to just > replace it? > > Also, in my header tank doesn't seem to have an extension on the overflow > line so I don't get the full six gallons and my fuel gauge never goes to the > top. I have drained the tank and got about 5 gallons tops out of it. Can > the overflow line be replaced w/o taking the tank out (e.g., through the > fitting on the back of the tank). > > BTW, the header tank was replaced new about 6-7 years ago, by a previous > owner, so the hardware is not too old. > > Any insight or advice appreciated. > Best regards, > Rich Green N3881H 415-CD >
