Zodiac Pro 420 planing and porpoising

[Jnearen]

Picked up a used 420/50hp Yamaha. It stands up on its tail when trying to plane. Only way to make a smooth plane is just WOT it. Once up on plane, at anything less than a fast pace, it tends to porpoise (or buck).

Q1--Are there any trim tabs that will fit it? Bennett SLA6 will not.
Any other suggestions to address these two issues?

Q2--Finally, does anyone make a bimini for these small Zodiacs? A custom is quite expensive. Thanks Jim

[beamishken]

Originally Posted by Jnearen

Picked up a used 420/50hp Yamaha. It stands up on its tail when trying to plane. Only way to make a smooth plane is just WOT it. Once up on plane, at anything less than a fast pace, it tends to porpoise (or buck).

Q1--Are there any trim tabs that will fit it? Bennett SLA6 will not.
Any other suggestions to address these two issues?

Q2--Finally, does anyone make a bimini for these small Zodiacs? A custom is quite expensive. Thanks Jim

Doel fins or similar hydro foils & possibly lifting the engine up the transom would probably help