As Fleetwin said, look at the actual motor castings under the gearcase impeller plate. I had a motor where water didn’t flow out properly for the winter and it cracked the gearcase castings under the plate, causing cavitation.
It drove the group crazy trying to figure out what was going on. Frank the guru, finally came up with the solution. Changed the gearcase and all was fine.
if you could shoot a picture of that area, I think it would allow us all to look and rule that theory out.
Bob D
