This pump came to me as junk. It may have fallen off a truck...it was badly damaged. The engine now runs fine. Originally it appears this was a self-priming water pump, but all of the outer housing was missing. I welded up a rotor shell and sealed all the obvious holes. First test it leaked like a seive. I used some water resistant house floor leveler (left over from my house building days) to seal the whole machenworken. I have tried it without a priming port and with a priming port. It does help the prime to be able to run a hose directly before the pump...but it still barely pumps. There is a little pressure, but nothing like I expect. It is designed for 2" feed hose, but all I have is PVC pipe in 2" and can't get it into water properly so I switched to small garden hose. Would this pump, with 2" designed feed and 3/4" outlet actually require a 2" feed hose?