Yamaha 200 4 stroke vibrations

[RandyLangston]

Do the bottom 2 cyclinders stop firing at low speed while in gear like the 2 stokes V6's?<br />Thanks

 

[seahorse5]

Re: Yamaha 200 4 stroke vibrations

No, all the cylinders fire all the time on the 4 strokes.

 

[RandyLangston]

Re: Yamaha 200 4 stroke vibrations

Thanks Seahorse. This motor only has 3 hrs on it so I will wait for the 10hr breakin to see if the rough idle improves at slow speeds. There are also times that the engine will get real smooth for awhile then change back to a slight roughness.