Okay, tractor ran fine for over an hour yesterday(Friday). Saturday the tractor ran out of fuel again under heavy load. This would seem like the fuel pump is right on the edge of providing not enough fuel and then it runs out and stalls. The other interesting aspect of this: I can pump fuel manually with a priming lever as part of the pump. Priming the pump yesterday(Saturday) the pump could not fill the glass bowl...you could see it running down the edges of the glass bowl, then it would just disappear. ??? Now after I got the tractor running Friday, it eventually filled that separator bowl, especially after throttling up and then down. I have to believe that the diaphram of the fuel pump is possibly toast(or at least having some small leak), but also wondered if I should pull the fuel gauge assembly at the fuel tank and check it for leaks. I say this because a suction/blow test with the hose lines was not totally reassurring as it did not uniformly blow bubbles on the suction line as it should, right?
Any other thoughts before I pony up on the $125 fuel pump?