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  1. C

    Yamaha 01 250 OX66 running rough. Trying to figure it out.

    Bad stator. Replaced and running great again.
  2. C

    Yamaha 01 250 OX66 running rough. Trying to figure it out.

    Going to try that. Sounds like a good idea.
  3. C

    Yamaha 01 250 OX66 running rough. Trying to figure it out.

    Yes. I had them done professionally and got the flow chart back. All even now and cleaned with new filters
  4. C

    Yamaha 01 250 OX66 running rough. Trying to figure it out.

    I did clean the O2 Sensor and the barbell. Had some carbon build up on it. Still ran rough so I changed the 02 Sensor to another one I had. Still same thing. Was raining all day today so wasn’t able to work on it more. But going to check all the coils and spark tomorrow hopefully.
  5. C

    Yamaha 01 250 OX66 running rough. Trying to figure it out.

    I did change and put new spark plugs too. gapped correctly as well.
  6. C

    Yamaha 01 250 OX66 running rough. Trying to figure it out.

    My 2001 Yamaha OX66 250hp was running real rough when idling. Would turn off too. I checked compression and I am at 115 on all 6 cylinders. I changed the VST filter, had the fuel injectors cleaned as well by injector-man. New primer bulb and rancor filter. Also 3 new fuel pumps. As well...
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