notched transom ?

[micel]

I have a 1200lb hydra-sport 18'cc kevlar hull(inshore or deep bay boat) the loa is 20'4",7'10" beam with a 11" notched transom.The engine is a 470lb,25"shaft dt150 suzuki outboard mounted in highest position possible and a doel-fin.From the top of transom to beginning of notch is 18.5 "which recedes 11"then drops down 8" to bottom of v.The anti-cavitation plate is .5" above the v now which can not be any where close to being correct.What wold be the best way to get prop into sweet spot which is now digging way-way too deep?I've considered a jackplate but am worried about upsetting balance of boat with the 11" notch already.Idle the boat sets perfectly but with a set back I'm afraid in any seas at all I'm going to be in trouble with the open transom.Any help or input would be greatly appreciated!

 

[freddyray21]

Re: notched transom ?

post a pic cause I am having a hard time getting a picture in my head.

 

[Dhadley]

Re: notched transom ?

You've got a 25" motor where a 20" motor should be. That's the whole idea behind the step (notch). Outside of a different mid section a jackplate is the most obvious solution.

 

[micel]

Re: notched transom ?

The setback is what worries me,already having 11".The least I have found is 4" from bob's,has anybody had any experience with bob's 4 in 1 plate?

 

[Crownie2]

Re: notched transom ?

There are set-back plates and vertical extensions available at CMC.

Check the site at Cook-Mfg.

Bob

 

[Dhadley]

Re: notched transom ?

Bob's is the only convertable one that I know of. We've used and sold lots of them, excellent plates as are the CMC plates.

 

[micel]

Re: notched transom ?

Thanks for input!I'm contemplating getting bob's 4 in 1 plate.Does anybody have any experience with them?I have not been able to find any info on them.Whats a convertable?

 

[Dhadley]

Re: notched transom ?

It'll convert from 3" setback to 6", negative wedge or not etc. Go to Bob's website and I believe there's an animated deal there showing all the options. We've used them on race motors of 300+ hp. No problem.

 

[Dhadley]

Re: notched transom ?

Of course the hydraulic is nice too. It's real nice to have the button.........

 

[micel]

Re: notched transom ?

The 4 in 1 or cmc extenision plate for $99 will give me 1-5" of lift and should put prop in sweet spot.The cmc 5.5" hydraulic jackplate is actually what I want, I just wish there was a formula I could use to find out if 5.5" of setback would upset geometry of hull.