What's to stop a guy from replacing the computer and injectors and ending up with a 140hp motor??

Bet that would make a 618T get on it's pad

Actually, you would end up with a 115hp motor.
The 90 and 115hp motors have the same block and injection system.
The 140hp however has the same block, but the holes have been bored out for larger pistons and more displacement.
Also, the intake system has been changed to allow more air to flow into the motor to make the power.

No issue with the 90 to 115 change however.

Take care
REW

If REW says it would be a straightforward conversion, I take it as gospel.

Just think about this though -- your insurance company may have some issues with a now-illegally-powered boat.

Further, I have been told by a reliable source, that once you over-power the transom, you are liable for any transom failure on that boat for the rest of the life of that boat. If that is true, and I am assuming it is true because of the source, I don't think I would want to assume that liablility. Who knows that the person you are going to sell it to (or the 3rd owner to whom that 2nd owner might sell it to ... etc.) might do to the boat and then try to hold you accountable for it.

I assume your question was just theoretical, however. And it would indeed make for an interesting project.

If REW says it would be a straightforward conversion, I take it as gospel.

Just think about this though -- your insurance company may have some issues with a now-illegally-powered boat. .

Yep, I'm sure this is true.



.[/QUOTE]
Further, I have been told by a reliable source, that once you over-power the transom, you are liable for any transom failure on that boat for the rest of the life of that boat. If that is true, and I am assuming it is true because of the source, I don't think I would want to assume that liablility. Who knows that the person you are going to sell it to (or the 3rd owner to whom that 2nd owner might sell it to ... etc.) might do to the boat and then try to hold you accountable for it..[/QUOTE]

How would this be proven, you replace the ECM with the 115 ECM, then put the original back when you sell it. Who would be the wiser, and how would they be able to tell.

[/QUOTE]
I assume your question was just theoretical, however. And it would indeed make for an interesting project[/QUOTE]

Of course, it's just "bench racing"

[/quote]
How would this be proven, you replace the ECM with the 115 ECM, then put the original back when you sell it. Who would be the wiser, and how would they be able to tell.
[/quote]

They probably couldn't tell.

Unless, of course, all your buddies that know what you did spread the word around and it gets back to the subsequent owners.

Not that anything like that could ever happen ... a guy and his buddies bragging about their wrenching skills and beating the law. I know I never did that ...

:rotfl:

Nor have any of my buddies :rotfl:

That's why I used my name when enquiring.

There won't be any friends involved... I've turned a wrench or two in my life....
If it's not witnessed it's hearsay(sp)

Order the ECM off the net...ship to POB

Besides if it runs as well as I hope....It's my "last boat"

That's why I used my name when enquiring.

There won't be any friends involved... I've turned a wrench or two in my life....
If it's not witnessed it's hearsay(sp)

Order the ECM off the net...ship to POB

Besides if it runs as well as I hope....It's my "last boat"

Just buy a 115 and put 90 stickers on it then. If it's your last boat, you don't have to worry about much, other than having a boat that performs (closer to) like it should (I'm assuming this is a tiller boat).

The VIN # and or model number on the data plate will give it away as a 115hp, then you're busted :Wedgie:

If you are not getting on the pad, maybe there are other LEGAL performance modifications you should be considering. Are you over propped? Are you running aluminum or stainless? Have you tried raising the motor? How about moving weight around?

That rig should have no problem getting on it's pad if setup correctly.

The VIN # and or model number on the data plate will give it away as a 115hp, then you're busted :Wedgie:

I understand what your saying, but at the same time a friend of mine has been running an 18 foot boat with a 140 tiller for 5 years. He hasn't been busted yet. So, I guess your not really busted??? :fart:

It may be harder to sell it, but then again, now that he owns a tiller with adequate power, he's not interested in selling his boat. He likes the one he has!

I'm hoping the CG may take notice and adjust their formula sometime soon. Then we can have adequately powered tiller boats under 20 ft length. Not that I'd ever expect the CG to completely wake up and get with.... the 90's.

"Further, I have been told by a reliable source, that once you over-power the transom, you are liable for any transom failure on that boat for the rest of the life of that boat. If that is true, and I am assuming it is true because of the source"

I dont buy the transom failure statement. Look at some of the tiller/console models out there. The hulls/transoms are exactly the same in alot of models. A good example would be the Lund Explorer I bought in 2005. The console and the tillers models were exactly the same. they just screwed in a console on one of them. Yet the tiller I had was rated for a 60 hp when the console was rated for a 90. same transoms/hull exactly. If the console could handel having a 90 why couldnt the tiller. **** coast gaurd!!!:stick:

How would that affect the transom if you put a steering wheel in that same boat you can run a 175hp

Many tiller hulls have a console twin that is generally rated for an additional 50 HP ( give or take ). Why less HP on a tiller, ask the BIA! Why did Merc. buy Tim Mertens Tiller Power Steering system - You answered your own question!! JP

QUOTE=REW;1045086]Actually, you would end up with a 115hp motor.
The 90 and 115hp motors have the same block and injection system.
The 140hp however has the same block, but the holes have been bored out for larger pistons and more displacement.
Also, the intake system has been changed to allow more air to flow into the motor to make the power.

No issue with the 90 to 115 change however.

Take care
REW[/QUOTE]

Rew If a throttle position senor is set to .5 volts -5. volts {i thinks these numbers are right} What does the difference in voltage actually do ?

Secondly do you know if the Suzuki 140 has an adjustable one like the Yamaha.