At 12:34 PM 10/1/98 EDT, Harry wrote: >If the fuel isdraining from the header, the plumbing is wrong..... or you are >mis-fueling, by adding the to the header tank....
I only fill the header about half way, if a lot has drained out and I want plenty of fuel. Does the pump outlet in "regular" coupes flow to the TOP of the header tank? I don't think this one does, and I think that's the way the factory did it, but I don't like it. The fuel system diagram on this M10 shows the pump line outlet feeding at the bottom of the header. I'm pretty sure this is the way it is because that's the way fuel COULD gradually flow, through the pump, back to the wings. On the subject of fuel pressure in the wing tanks: The fuel system diagram in the book shows no venting at the wing tanks, only a single vent from these tanks running up to the top of the header. This explains why no spillage occurs until the caps are removed. In a fuel system that has evolved for so long, I would think it would be set up pretty optimally by now, but it sure seems like the outflow from the pump should be at the top of the tank, on a riser like the vent and overflow lines. This would keep the fuel dumping to a minimum if the pump line should come loose, or the outflow nipple break off of the pump. It can't be that the pressure head would be a problem, it would have the same pressure either way. After reading some of the comments, it's possible that the fuel system in the M10 is different than most coupes in several ways, the lack of cap vents for one. ----------------------------------- Steve Dold ([EMAIL PROTECTED]) Say NO to useless over-quoting -----------------------------------
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