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  1. #1

    loss of power ultra 150o

    Took the ultra 150 out for the last 3 days after rebuilding the pump and went excellent until yesterday, was going hard in a straight line then all of a sudden just lost all of the topend power it was still going but would not plane tried giving it a rest and tokk for it run later on but still no difference, anything I should check or what is causing it not to go normal.


  2. #2
    steve45's Avatar
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    The first thing to do is pull the spark plugs and see what they look like. While you have them out, ground the spark plug wires and run a compression test.

  3. #3
    Quote Originally Posted by steve45 View Post
    The first thing to do is pull the spark plugs and see what they look like. While you have them out, ground the spark plug wires and run a compression test.
    Spark plugs are new and what tool do I need to test the compression?

  4. #4
    Spark plugs might have been new at the begining of the ride but they can still foul. If youve already tried new plugs then thats different.

    Next thing to check is your pump. Its the last thing you touched so go back and make sure the impeller didnt loosen up and back off.

  5. #5
    Quote Originally Posted by Shogun View Post
    Spark plugs might have been new at the begining of the ride but they can still foul. If youve already tried new plugs then thats different.

    Next thing to check is your pump. Its the last thing you touched so go back and make sure the impeller didnt loosen up and back off.
    Will check those when I have time this week, thanx!

  6. #6
    btldigger's Avatar
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    Quick thing to check when your on the water and it does something like that. Pull the seat back and feel the base of each plug. If you find one noticably cold change it out. If the plug is wet and black its fouled if its gray or silver then you probably killed a piston.

  7. #7
    Quote Originally Posted by btldigger View Post
    Quick thing to check when your on the water and it does something like that. Pull the seat back and feel the base of each plug. If you find one noticably cold change it out. If the plug is wet and black its fouled if its gray or silver then you probably killed a piston.
    Hope Its not the piston!

  8. #8

    simple test

    Do a compression test. You should have around 120lbs.

  9. #9
    What tool do I need to measure compression?

  10. #10
    steve45's Avatar
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    You need a compression tester, about $25 at any auto parts store, Harbor Freight, and some Wal-Marts.

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