AMD Rules wrote:
Regardless of the angle that I position my motor (manual tilt
adjustment) the front end of the boat dives low. Even when in the boat
by myself the front end will not lift upwards much when accelerating and
the motor is tilted up all the way. It has never even come close to
porpoising at all. What can cause this behavior?

I've looked for excess weight up front to no avail, and also made sure
the drain is not plugged. This ob motor (40hp) originally came with
fins which I removed before having ever used them. My thought is that
they would make this nose diving problems even worse. What am I missing?

Thanks for any advice.

The boat was kept on a trailer, probably, and has now developed a
concave "hook" in the hull shape. Check the shape of the keel as viewed
along the bottom from the back.

Rob