Rcimp,
My bet is the fuel pump is fine but that the carburetor float is stuck, inlet if plugged or some other problem with blockage. The pump, if it outputs at all is usually fine..it's hard to judge pressure and volume by merely disconnecting the fuel line.
The carburetor has a fuel bowl that will sustain it for awhile and the new carburetor shouldn't tax the stock pump at all.
My first guess is that the carburetor had problems from the git go and maybe that's why it was peddled on e-Bay...either that or is has sat for a long time and has filled with critters.
If the pump worked on the previous carburetors then I would think it is fine...take a look at the new carburetor.
Stuart
