how deep should a prop be?

[Bluedog]

I am working on a 24' pontoon, I have a 1990 75HP Mercury on the back. How do I know what is the best depth to have my motor set at . Overall I can raise or lower the unit 5". Give me some guidlines please.

 

[Silvertip]

Re: how deep should a prop be?

Since there is so much drag on a pontoon anyway, the mounting height is not as critical as it is on a planing hull. Mount it one hole up and you'll be good. The engine runs in turbulent water so the prop needs to be set deep.

 

[Bluedog]

Re: how deep should a prop be?

Thanks, I want as must bang for my gallon of gas as possible. I like the pontoon , but riding fast is fun too.

 

[Texasmark]

Re: how deep should a prop be?

The answer to the basic question is "as shallow as is possible". Toons aren't where you get sizzling performance to satisfy your speed whims......you know that. Requires 2 boats; one for tooning and one for spooning................... Ha!

Just had to jump in here.

Mark