On Wed, 18 Feb 2004 12:24:44 -0500, DSK wrote:

If the fuel pump is a positive displacement (which AFAIK they all are)
and the fuel flow is regulated (which it will be, by the injector pump),
then increasing the size of the piping will *reduce* the load on the pump.

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The fuel pump on my generator is a small electric unit. I don't know
if it is positive displacement ot not but reducing the supply diameter
fixed the problem for sure.

Is it not true, that in "lift" mode, the pump is lifting less weight
of fuel in a small diameter line?