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1999 Yamaha OX66 225Hp Ticking or Knocking Noise

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  • 1999 Yamaha OX66 225Hp Ticking or Knocking Noise

    Have some sougt of noise just like in this video https://youtu.be/T7fJvD7CKis coming from the front of the mortor maybe intake valve any thoughts?

  • #2
    My 2001 made same noise. It was loose piston in bottom port side. 65 PSI compared to 115 in others.

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