Converting 2000 2 stroke 9.8 hp Nissan to 15hp

[anthgarc]

New to the board, so have mercy. I looked and couldn't find anything regarding this motor and procedure. I'm told this is a matter of changing jets or reeds in carb. This this true? If not, what EXACTLY needs done and what is the approx. cost from a service center? I'm very happy with this motor, but have a "need for more speed". <br /><br />Thanks ahead of time

 

[DJ]

Re: Converting 2000 2 stroke 9.8 hp Nissan to 15hp

Look for a restictor plate between the carb. and reed plate and/or throttle linkage that does not go to WOT.

 

[anthgarc]

Re: Converting 2000 2 stroke 9.8 hp Nissan to 15hp

Thanks for the reply, Djohn19!. Have you had experience with these motors? What exactly is "WOT" mean?

 

[b.gagnon]

Re: Converting 2000 2 stroke 9.8 hp Nissan to 15hp

Wide open throttle

 

[anthgarc]

Re: Converting 2000 2 stroke 9.8 hp Nissan to 15hp

I removed the carb tonight, and I believe I saw the restrictor plate in front of the "fine mesh" reeds facing me. After this restrictor plate is removed, does the motor have to be "tuned" again?

 

[prowlersfish]

Re: Converting 2000 2 stroke 9.8 hp Nissan to 15hp

the difrence in not in the restrector plate its in the timing cam below the flywheel

 

[TGuy]

Re: Converting 2000 2 stroke 9.8 hp Nissan to 15hp

You can't make the 9.8 into a 15hp. Two completely different blocks are used for these motors. Now if it's the old NS9.9 (not 9.8), then it's a different story because the 9.9 and the 15 used the same block. The only difference between those models was a throttle cam. But the 9.8 cannot be made into a 15 no matter what you try (the 9.8 was a beefed up 8hp)