[QUOTEIt can bypass internally all it wants since internally isnt a resevior with air in it it will make no difference on fuel demand from the tank. Any bypass or leakage internally is either going to stay in the pump or more likely go back to the tank on the return line. The only thing making it difficult is if they have more then one return line going back to the tank.QUOTE]
the internal bypass concern involved a concept using pump rotations and fuel control rod position a few pages back.
if the ball melts in the old zemco a 6mm BB works nice.
i check calibration each tank full any way.
there probably is an inexpensive impeller in a fish bowl pump or
something that would make a good flow meter, we just haven't found it yet.
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