Hi everyone,
I have a Yamaha 115hp and would like to up the power output to 130hp
or even 140hp. The specs for these motors is all the same so it must
be timing and /or jets in carbies.

Has anyone done this and could you tell me how.

Thanks

Billgran wrote:
wrote in message
oups.com...

Hi everyone,
I have a Yamaha 115hp and would like to up the power output to 130hp
or even 140hp. The specs for these motors is all the same so it must
be timing and /or jets in carbies.

Has anyone done this and could you tell me how.

Thanks



Contact Marine Performance, Inc. Nixa, MO (417)725-5746, also known as
Hydrotec marine.



I thought modifying outboard motors for more power for non-racing use is
now prohibited, at least as of some model year like 2000. Is that not
true?


--
Del Cecchi
"This post is my own and doesn’t necessarily represent IBM’s positions,
strategies or opinions.”

jaxam2 wrote:
I have a Yamaha 115hp and would like to up the power output to 130hp
or even 140hp. The specs for these motors is all the same so it must
be timing and /or jets in carbies.

.....and possibly heads and piston shape and compression ratio as well.

Billgran wrote:
@hotmail.
Contact Marine Performance, Inc. Nixa, MO (417)725-5746, also known as
Hydrotec marine.


Del Cecchi wrote:
I thought modifying outboard motors for more power for non-racing use is
now prohibited, at least as of some model year like 2000. Is that not
true?

Prohibited? In the USof A??? (sounds unconstitutional to me)
BTW, I have the opposite situation. A 200hp Mariner that I'd like to
trade off some horsepower for better fuel consumption.

Rick

lid wrote:
jaxam2 wrote:

I have a Yamaha 115hp and would like to up the power output to 130hp
or even 140hp. The specs for these motors is all the same so it must
be timing and /or jets in carbies.


.....and possibly heads and piston shape and compression ratio as well.

Billgran wrote:

@hotmail.
Contact Marine Performance, Inc. Nixa, MO (417)725-5746, also known as
Hydrotec marine.



Del Cecchi wrote:

I thought modifying outboard motors for more power for non-racing use is
now prohibited, at least as of some model year like 2000. Is that not
true?


Prohibited? In the USof A??? (sounds unconstitutional to me)
BTW, I have the opposite situation. A 200hp Mariner that I'd like to
trade off some horsepower for better fuel consumption.

Rick

It's the EPA. For the Children. They can do anything you can't stop
them from doing. And it is only any modification that could affect
emissions or power output. :-)

--
Del Cecchi
"This post is my own and doesn’t necessarily represent IBM’s positions,
strategies or opinions.”

I thought modifying outboard motors for more power for non-racing use is
now prohibited, at least as of some model year like 2000. Is that not
true?

I live on the other side of the world .. in Australia. I don't know of
any laws like that hear and the motor will still have all the signage
of a 115Hp.

wrote:
I thought modifying outboard motors for more power for non-racing use is
now prohibited, at least as of some model year like 2000. Is that not
true?


I live on the other side of the world .. in Australia. I don't know of
any laws like that hear and the motor will still have all the signage
of a 115Hp.

Lucky you. Check the bass and walleye boats website.
http://www.bwbmag.com/
go to performance section for some information.

Or use search to find other articles that might be interesting like
http://www.bwbmag.com/output.cfm?ID=942967

--
Del Cecchi
"This post is my own and doesn’t necessarily represent IBM’s positions,
strategies or opinions.”

Thanks everyone for the info. I will see what I can do to get boost
out of the little engine.