Wet Test

[RidgeRunner]

I know it will get figured out. If the motor was mounted on the verge height wise, the bottom could be the culprit. I was suggesting that only 3/4" high (one hole on the bracket) probably wouldn't be the cause, rough bottom or not.
The bottom will have its day. Don't sweat it.
I got a new impeller for a Yamaha 80 hp and it was the wrong one. It had a slightly smaller diameter and didn't fill the housing enough to get any flow to the powerhead. Not saying that is what you got, just remembering what a PITA it was to do the job twice with two trips to the dealer. I feel your pain.