Oil pump won't prime

The pump may be hitting the main bearing bolt, i needs to be flat, if you got main studs, its almost a guarantee that its hanging up on it. You almost have to set the shaft receiver in the hole and then get it to seat..And the pump will drag big time when it starts pumping, my corded 120V Dewalt started stinking about 5 second into it and it was really dragging. Remember to plug your oil sender hole...ask how I know...