1999 Yamaha OX66 225Hp Ticking or Knocking Noise

michaellucas

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Join Date: Aug 2019

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1999 Yamaha OX66 225Hp Ticking or Knocking Noise

08-25-2019, 10:19 PM

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?

OX66-is this a knock? - YouTube

https://youtu.be

200hp ox66 SWII. Year 2000. Recently replaced o2 sensor, LP pumps, VST filter, primer bulb & line. Is this a piston knock?
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oldcobia

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Join Date: Apr 2014

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08-28-2019, 12:51 PM

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