Got some pics today.
As you can see the top of the impeller housing is crushed. This is the same as it was when he originally got it, different pump but same style( new one). I think the pump is incorrect. However a reputable marine tech says it's right and that's how they are in terms of fitment. Just sounds strange/wrong to me.( this housing and seal(rubber insert) on top reminds me of the exact type that uses a tube to get water to engine from the impeller housing. The seal insert used for tube looks identical as this pump)
The seal(rubber insert) on top of the housing is what seals to the midsection to the pump housing but it gets crushed when tightened up.
On the rear of the midsection there's two outlets. The one on the right( as viewed in the pic)
is the Water pee hole, the left is exhaust. I assume there should be water coming out the exhaust port as well?? Only get water from pee hole. Didn't have time to get the part numbers for the current impeller kit, nor the other ones we tried.