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  1. #1

    1999 Kawasaki Ultra 150 Cylinder Issues

    When I purchased this thing the third cylinder melted with in 30 min of operation. I sent it to SBT to have it rebuild, spent the extra for the warranty. Got it back and the next season I was able to try it out. I ran it approximate 10 hrs over that season. I winterized it and when I go it out the next season the compression was low on the third cylinder. I pulled it and sure enough it was melted. I had a friend help me bore the cylinder out to the next minimum size and replace the piston. We noticed the oil pump had a small leak so we replaced it and confirmed its operation. When I took it to the water I ran it a few minutes at a time and let the motor cool to help seat the rings. After about an hour of running time it died in the water. Started it back up and it ran about 75 yards and died again. After the third time it started vibrating very rough (like a knocking engine would). I towed it in and when I got home checked compression and the third cylinder was low. Pulled the head cap and it was melted again. I need help determining the problem Any suggestions?


  2. #2
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Quote Originally Posted by Samson View Post
    When I purchased this thing the third cylinder melted with in 30 min of operation. I sent it to SBT to have it rebuild, spent the extra for the warranty. Got it back and the next season I was able to try it out. I ran it approximate 10 hrs over that season. I winterized it and when I go it out the next season the compression was low on the third cylinder. I pulled it and sure enough it was melted. I had a friend help me bore the cylinder out to the next minimum size and replace the piston. We noticed the oil pump had a small leak so we replaced it and confirmed its operation. When I took it to the water I ran it a few minutes at a time and let the motor cool to help seat the rings. After about an hour of running time it died in the water. Started it back up and it ran about 75 yards and died again. After the third time it started vibrating very rough (like a knocking engine would). I towed it in and when I got home checked compression and the third cylinder was low. Pulled the head cap and it was melted again. I need help determining the problem Any suggestions?
    air leak on number 3 cylinder or carb issue, Sounds like a lean condition.

  3. #3
    How could I get the air leak checked, nd where wold I start with the carbs.

  4. #4
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    You would probably get more response if this was moved to the Kawasaki 2 Stroke section....................

  5. #5
    I am new to this how do I move it?

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