Help with outboard bracket design

Hello,
I am going through the process of swapping inboard engine on 2007 doral 250 monticello,
I'm going to install twin outboard engines (250 Yamaha 4 stroke), I need someone to make the design and drowning with right measurements of bracket, i didn't find it website can provide me that, I hope i can get someone to make and sale the drawing so i can fabricate it in my country.

I would really appreciate peoples opinions on this.
Looking forward to your thoughts

 

Gonna be tricky to get it done remotely. It looks like the back of the boat is better suited for a single. Have you considered 425hp?

I think you would be very, very pleased, especially considering my hunch that major structural efforts would be needed for a double bracket. And, you can likely buy a commercial bracket for a single.

The 425 is really a very promising achievement in power and I expect it will change the industry.

 

Thanks dear for your reply,
Already I have the 250s of my old boat and planning to fix them instead of getting new engines,
I was thinking to order the bracket, but unfortunately it's take 12 weeks to me done in US + 6 weeks shipping to my country, that's why I'm trying to find someone specialist to provide me the right measurements and drowning.

 

Order it. That is good time for something ready to go.

 

Is the bracket you can order but takes 18 weeks to get specifically designed for this boat?

 

As I received from 2 factory thay need minimum 12 weeks, and I need to complete it ASAP, so I'm trying to find the drowning so I can fabricate in one week in my country

 

Installing 500 HP on that boat will likely cause structural and handling problems. The original engine had 260 HP.

 

You should provide data about the aft area and its internal structure, where you want to install the engines, so that someone can design the bracket and how to connect it to the current structure.

 

Sure I will provide all information for the person or company who will make the drowning

 

Could we see that information?

 

Please find the attachment

 

Yes, I had already seen that. That is why I asked you to show more information because this is not of much use. You are going to place a very large weight on the stern, with two motors that will exert a great push on the new bracket and it is necessary to know very well how it is going to be placed and how it is going to be connected to the existing hull, to know if this is enough to withstand those efforts or whether it should be reinforced. Not to mention that a very large additional weight at the stern will undoubtedly change the navigation conditions (and stability) of the boat.

 

I will provide you the pictures tomorrow,
for sure I'm going to increas the support of existing hull afterInitial installation of the bracket,

 

My company has built a lot of custom outboard brackets. Quite a few of those were for conversions...from inboard or I/O to outboard power. I cannot imagine a design that would mount two outboards on that transom, with all that overhanging top deck and a notch only wide enough for one outboard. Stainless Marine, Armstrong, our own...all designed to mount the outboards back off of a "clear" unobstructed transom.

Unless...you'll never trim the engines up....or you are already expecting to cut away some of that aft deck overhanging the transom?