I am trying to prime my freshly rebuit 250 and I cannot get any oil pressure. I know it is pumping oil because I can feel it bog the drill slightly and oil does come out at the gauge tap just no pressure, and the gauge is brand new. I took the valve cover off and oil is getting to the head on some of the rockers but it seems to be a very small amount. I have also rotated the motor several times while spinning the oil pump with know luck. Also I did clean all the oil passages and push rods with solvent and brushes before rebuilding.
