[mdunn]

Just a thought...when I replaced my tank, I accidently pinched the rubber vent line on top of the tank. It would run until the pump couldn't draw a vacuum any more and then die. Let it sit for a little while, get some air back into the tank, and then the pump could draw again. Your problem does sound like vapor lock, but if it wasn't doing it before you changed the tank, I would check to make sure you didn't pinch off any of the lines on the reinstall. Good luck!