I know this sounds crazy...but agrihawgs dad has built alumacraft boats for over 30 years. They had a model they were testing and it wouldn't plane. No one could figure it out. He had told them over and over again it would not plane out and run. Finally they asked him to fix it. He took a hammer and dented in the back of the boat right in front of the transom ever so slightly. Boat planed pretty as you please. As said before maybe something under the boat.
"But if serving the Lord seems undesirable to you, then choose for yourselves this day whom you will serve, whether the gods your ancestors served beyond the Euphrates, or the gods of the Amorites, in whose land you are living. But as for me and my household, we will serve the Lord.” Joshua 25:15