Motor hight?

[Grumpygills]

Do the same rules apply to all boats? I picked up an aluminum boat that has a 90hp mercury and it handles like crap. Feels like it's dragging an anchor . Tons of power for the boat but plows then you trim it and itpurposes

[siskiyoucrash]

With my Lowe Jon Boats Porpise was usually from over trim. Height can be critical, and the difference between a traditional square bow and the modified veebow that they put on everybody is a game changer also. The traditional square bow will ride up and over wakes and get on plane a lot better than the modified version. The modified veebow plows into wakes and waves and does not jump on plane as well. This is all just my own experience and what I learned after owning both styles.

[pmgoffjr]

No, motor height changes when you go to an iron boat. Porpoising is 99% caused by your prop losing it's bite, and falling down. Lowering the motor so it gets better grip on the water helps, changing to a more aggressive design helps, and then it starts going to radical changes like trim tabs.

[Nova Kaw 650]

There's several questions and answers in your other, identical post in the tin boat forum.