If your header tank is siphoning back into the wing tanks, then the spring loaded valves in the fuel pump are not sealing properly and allowing fuel to leak back. However, due to the placement of the fuel supply line to the header tank, it should not be possible for the entire tank to leak back to the wings. It should only leak back to the point where the supply line is. Lee Browning All the fuel in the header tank has siphoned to the wing tanks leaving the header dry. The plane has been inactive for 3 weeks. Is this normal? Do I need to put fuel into the header tank before I start her or is the fuel pump up to the task? Thanks. Mac McMahon N94184 VKX PS We have 18" snow on the ground now and expect another 18" this afternoon so I may not get to this for a while. Washington, DC just isn't up for this.
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