The pumps usually have a screen on their intakes... that could be clogged.
There could be a hipressure leak inside the tank hose..
Outside of that the pump itself is so worn it cannot get the pressure needed.
Sounds like not enough gasoline in the tank don't it?
I have not had one that WOULD run that was bad.. If they ran the problem was something ewlse..but one never knows till the problem is found.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

professional bovine relocation specialist