Need ideas to stop porpoising?

[Bushwacker]

. . .my suggetion on a bow raising prop and raising the motor was expensive . .

You need a STERN lifting prop, not BOW lifting (they're used on bass boats to get more speed)! I would think Honda would make stern lifting props to compensate for the weight of their 4-stroke engines. Dealer should be willing to raise motor for free (it's a very simple job) if he installed it, to help mitigate the problem you're having. Might be worth trying to find a Honda rep with more technical savvy!