I agree, that looks like a set up issue. Not enough clearance. I spoke with Milodon when i did mine and they gave me the specs. I dont remember what the spec is at the moment, but a call to Milodon will get it done with the proper shaft length. Before the oil was drained, the system was full of oil and would pull a prime, but once drained there was too much clearance and not enough oil to prime.