[johnkosir]

Richard knows alot more about this than I do, but if the pump is not full of oil it will not have a lot of suction, I would try to feed oil in to the filter like Richard said, try to prime the pump, does the hand  pump in your fuel tank work,712 has a hand pump in the fuel tank, try to feed fuel to the fuel filter with a electric fuel pump, hook up the electric pump to the line that goes to the fuel tank an see if is getting pure fuel or are there air bubbles in the discharge, on my Windsor allege plugged  my pick up line had to blow it out with compressed air