Well, just got home and crawled under there to get a better look. It is a 14x18 1 1/8" 4 blade prop. Is this what is causing my performance issues? Like I said, it will not pull up on plane with the ballast full. I would think the compression is fine as it runs smooth and never missed a beat, just struggling to get on plane when it's under a heavy load. How much will the 14.25 x 14 prop help? Thanks.