tohatsu 50 - yamaha 70 carbs?

[Roflhat]

I'm sure this has been brought up before but I can't find the thread?

Basically I'm wanting to put yamaha 70 carbs on my Tohatsu 50 D2, how easy is it to do? anyone done it? do they require re-jetting?

Thanks!

[Roflhat]

theyre from a 1997 model

[omcstratos]

I don't know if/how they will fit, but you will have to play around with jets with any kind of changes you make to get the most out of it.

[Roflhat]

thanks for the reply, yeh i've heard i'll need to change some of the jets. don't know what to yet though.

[Fast Fred]

they bolt on, main jet, it's been a wile, should have a 130-135 main in the 50hp carbs, 145 for the 70 carbs on a 50hp. you maybe able to lean on her more at 140, but start with 145's

[Roflhat]

Hey Fred, was hoping you'd chime in! Thanks for the advice. I've heard there's some benefit to widening the reed block when going to 70hp carbs?

[Rabbitdundied]

In for later.


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[Rabbitdundied]

So what is the purpose of welding the crank? Is it because of high RPMs?


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[Roflhat]

Yeh, the tohatsu cranks aren't as strong as the yamaha 50 ones, so for anything over stock RPM welding the crank is necessary

[Roflhat]

also, does anyone know where to source jets for yamahas? Trying to find a link or something online