Another Offshore Bracket Question

[Reel Kahuna]

I've read several past post on the subject and on one thread it was written:
"The big advantage is putting the prop in cleaner water. It also allows you to raise the motor higher"

Does this mean that the motor cavitation plane doesn't have to be even or below the boat's hull?

The reason I ask is because I've found a used offshore bracket that I want to mount on my converted I/O to O/B but the bracket was made for a 25" shaft and the motor I have is a 20". I can modify the bracket but if the motor doesn't have to be below the hull then modification is not needed.

 

[Boatist]

Re: Another Offshore Bracket Question

For anyone to respond you are really need give a lot more information.
Pictures would also help.
To start with what size is the boat?
What is the HP of the motor?
Is this for flat inland water or big Steep Swells in Ocean waters??
Has your I/O's transom been reinforced for the size Outboard you want to mount.

Inland in general the cavation plate should run about even the the bottom of the hull.

Ocean waters it need to be much deeper. You do not want your prop coming out of the water when you go over a large swell. I/O transoms are usually not strong enough for large outboards without a major rebuild.

 

[NSBCraig]

Re: Another Offshore Bracket Question

Base line to start by is anti ventalation plate 1" higher the the bottom of the hull.

Then for every 6" back you go raise it 1".

If your transom is notched then you can go another 1".