I took the screen out and was not to bad on the outside, but the inside was about half full of what looked like bees wax, or hard jelly looking gunk. I did put alot of oil down the oil gauge hole and it never filled up. I dont believe there is a prime plug that I can get to. Could that be a up graded pump, or wrong? The only other plug with a screw driver slot is on the side behind the cast webbing for the motor mount. Should I go ahead and pull the pump? The pump is painted black, not like the block. What do you think now? Thanks Roger