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I kinda look at it as insulting to say achievement like that is easy.

On the other hand... If I had to cross the ocean with an outboard..... And I looked back and saw an old merc on the boat. I would start swimming right away instead of waiting for the inevitable. On the other hand if I saw the ugliest beat up 2.6 yamaha on the back I would breathe a sigh of relief.

I would LOVE to see the inside of a Kottman motor,.

what does it take to cut down a mid on a 2.6l and adapt a merc short trim ram,, can a merc mid be adapted to a yammi powerhead?

i agree its not easy,,unless you can go out and buy a kottman, but what fun is that.,.

No you cant do the merc mid thing.... I have no idea about putting a merc trim rams on a yamaha.
You can get a 20 inch yamaha mid cut to 15". It would likely cost around $1500.00 including shipping to somebody like marty powell. I think Rick said he would GIVE you a 20" mid.
Like a said... Hand any loser an XR and a Kottman 2.6 and I gaurantee he is not running no 110mph. I find alot of people's top speed claims to be WILDLY suspect.... WILDLY!

It would be easy in an XR or an STV with the power I'm talking about. Of course good set-up goes with it but that's not what the conversation is about.

Yes you can do a Merc mid if you want a 12" as it only takes an adaptor. Same applies for the 15" it's just that no one that I know of has designed one yet.
And as far as an XR with a Kottman if set up correctly 110 is by far an easy number to attain. I've witnessed at least 6 over the years that have run extremely fast and they weren't even a Kottman style motor. Pound for pound and horsepower for horsepower it's all in set up if you have the power. A well put together finger ported Yamaha will run very hard and make 250hp. A behind the liner motor along with other grinding will keep you with a "Drag" and more.
Keep in mind ----- just because you yourself haven't seen it or that you haven't seen it on the "Net" doesn't mean it doesn't exist. In the states there more shiit that makes wicked power then you can ever imagine. Alot of it comes from people that do it themselves and in some back woods area with a lake to play on.
If guys like Acie , Monty and Galen ( RIP ) didn't exist you'd be saying the same about OMC power of the "New era" that is.
If Yamaha had decided to enter into the HP O/B game that F1 race way back in the day with Ron Anderson things would be very different. But. Instead you must make the yourself. That's the fun in it

i can dream about owning an XR with a kottman,, but for now i hav a sidewinder with an excel and a 25" mid ,, so i have miles of improvement ahead of me,(hull,setup,power) im just leaning my options,, and "THAT" is the fun part ,,,is it possible to put a 20" merc mid/lower on the excel what parts are needed?

I don't know anything... But I know that set up is huge.... And it is work.

I believe there are huge horsepower everythings out there... And You are right. Just because It's not on the net does not mean that it does not exist... Because All I know about boats is from the internet. The point I was making was that there are lots of things that I HAVE read on the net that I call horsesh!t on. I am well aware of the crazy stuff out there power wise and wild custom mid sections and what not.

One thing you got me on though is that I did not know an adaptor was available to mount a yamaha on a 12" mid. That would be cool.

But the fact remains that if you are gonna do all this work to make a monster yamaha.... You might as well go to paul's and buy a 2.5 merc. By this point you have destroyed the reliability and now you have a high strung beast that has all custom parts in it ready to come through the side.

Like I said... I don't know everything. But I do mess with boats alot. And of course I do read the internets.

i'd rather keep it all yammi if i could, but it seems merc parts are easyer too come by ...whats you opinion on a speed cone for my yammi case? what options are out there?