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  1. #1

    07 15f low EVEN compression , 11hours 190psi

    2007 stx 15f with 11hours on it.. just bought it from a dealer. it was pulled out of the crate in 2009 and used barely for 3 months then winterized... the dealer PDI report shows compression was tested 2 days ago and is 190 dead even on all cylinders. ski seems to run good... ive never owned one to compare it too but it hit 61mph, im a 200 pound guy and it had a full take of gas... it went from 0-about 54 pretty quick just a few seconds..

    what would cause low EVEN compression... service manual said 170-260psi..im guessing at 11hours i should be near 260!


  2. #2
    It's fine-mine does exactly the same, always has. I'm a fat little prick too at about 200 pounds What could cause the compression to be higher-maybe carbon build up on the pistons. You could do another test and get a slightly different number (battery condition throttle position etc), another method could arrive at a variance.
    If you want to fully satisfy yourself check the valve clearance quickly.

    RT

  3. #3
    icky002's Avatar
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    could just be variance from gauge to gauge.

  4. #4
    Racer kawasaki15f's Avatar
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    I have alot of work to my motor and im hitting 280 PSI. I would be satisfied with 190 with a stock motor.

  5. #5
    Stock average is 190 to 210

  6. #6
    Pain is fear leaving your body.... rlovebk's Avatar
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    260# number is on a 12F I believe, not a 15.

  7. #7

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    Quote Originally Posted by jayp0209 View Post
    2007 stx 15f with 11hours on it.. just bought it from a dealer. it was pulled out of the crate in 2009 and used barely for 3 months then winterized... the dealer PDI report shows compression was tested 2 days ago and is 190 dead even on all cylinders. ski seems to run good... ive never owned one to compare it too but it hit 61mph, im a 200 pound guy and it had a full take of gas... it went from 0-about 54 pretty quick just a few seconds..

    what would cause low EVEN compression... service manual said 170-260psi..im guessing at 11hours i should be near 260!
    Jay, your right within specs. Ride it and have fun . I have an 07 and the compression is 190 on all 4 cylinders as well, with 40 hours on it. Be safe

  8. #8
    i appreciate all the responces... makes me feel better about this.... seems to run fantastic. very very fast machine... impressive.

  9. #9
    Kawasaki 15F specs:

    6-20 ENGINE TOP END
    Cylinder Head
    Cylinder Compression Measurement

    NOTE

    Use the battery which is fully charged.


    Thoroughly warm up the engine, while checking that there
    is no compression leakage from around the spark plugs

    or the cylinder head gasket.



    CAUTION

    Do not run the engine without cooling water supply
    formore than 15 seconds, especially in high revolutionary
    speed or severe engine and exhaust system
    damaged will occur.


    Stop the engine.
    Remove the front storage pocket
    (see Hull/Engine Hood chapter).
    Disconnect both two connection on the ignition coil primary lead connectors [A].
    Remove: Spark Plugs (see Periodic Maintenance chapter)
    Attach the compression gauge [A] and adapter firmly
    into the spark plug hole.
    Using the starter motor, turn the engine with the throttle
    fully open until the compression gauge stops rising; the
    compression is the highest reading obtainable.


    Special Tools - Compression Gauge, 20 kgf/cm: 57001-221

    Compression Gauge Adapter, M10 1.0:
    57001-1317
    Cylinder Compression



    Usable Range: 1 185
    1 795 kPa (12.1 18.3 kgf/cm, 172 260 psi)
    @430 r/min (rpm)



    Repeat the measurement for the other cylinders.
    Install the spark plugs (see Periodic Maintenance chapter).
    Torque - Spark Plugs: 13 Nm (1.3 kgfm, 113 inlb)

    Reconnect the primary ignition coil lead connectors, noting
    the #1,#4 [A] and the #2, #3 coil connectors. the

    #1, #4 coil connector has a red/yellow and a green/blue

    leads from the main harness. The #2, #3 coil connector
    has a red/yellow and green/black leads from the main
    harness.




    NOTE


    The service codes (COIL1 and COIL2) caused by this

    procedure are stored in the ECU. If necessary, these



    service codes can be erased by using the Kawasaki

    Diagnostic System (KDS).







  10. #10
    Live Fast wave15stx's Avatar
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    Quote Originally Posted by kawasaki15f View Post
    I have alot of work to my motor and im hitting 280 PSI. I would be satisfied with 190 with a stock motor.
    nice looking ski

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