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  1. #1
    I love water's Avatar
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    SLTX 1050 Problems

    My dad had this ski since new ran awesome. Then about 4 years ago we started having problems with it. If you started from a dead stop it would go 25 mph and that all. If you could jump it out of the water and get the rpms up wide open and the pump out of the water it would scream. If you slowed back down you would have to do it all over. We switched out carbs from a running ski that did not fix it. What could it be?


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome to the Polaris forum

    What model year is this SLTX?

    The problem cause is likely to be either carburetor or ignition.

    When the problem is happening, have you checked for spark on each cylinder?

    An inline spark tester installed between the spark plug wire and the spark plug will tell you if the plug is firing. All three plugs should fire with the same strength.



    To aid in diagnosing, leave the machine firmly strapped to the trailer front and rear. Then you can back it down the launch ramp until the jet pump intake is submerged.

    Take the seat off, and you can run the engine, and work the throttle while observing the engine.

    Note that the original ignition system on the 1050 engines is known to fail over time. Poalris released an Ignition System Update Kit, which includes a newer generation magneto stator and a newer design CDI.

    If your ignition system is failing, then install the Ignition Update Kit.

    While the problem is occuring, stop the engine. Remove the spark plugs, and compare them. If one plug looks wet, sooty black, or just different from the other two, then that is probably the cylinder which is not running correctly.

    If you cannot tell, you may need to install new plugs, and run it for a few minutes with the problem happening, then remove the plugs for inspection.

  3. #3
    I'm gonna go with crank index.

    When my 900 had a twisted crank it would do the same thing. It would barely get on plane unless I forced it to porpoise to get the pump out of the water to rev up.

  4. #4
    I love water's Avatar
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    sorry its a 97 we r leaning towards that where do you buy parts for these now?

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by I love water View Post
    sorry its a 97 we r leaning towards that where do you buy parts for these now?
    Are you going to do further diagnostics, or just install the ignition update it straight away?

    Polaris Domestic (red) engine

    How to figure out which cylinder is running poorly
    By testing the cylinders one at a time, you can narrow down which cylinder is dead or weak. Ground the ignition wires for all but one cylinder, and see if it will start (you may need to squeeze the throttle to get it to run). If it does, ground that plug wire, and test the next cylinder. Each single cylinder should run the engine about the same.

    How to figure out which cylinder is dead or weak




    In this example, there were two problems. Incorrect spark plug firing order, and the PTO carb was missing a part!


    Polaris domestic engine Ignition System Update Kits


    All 1996-1999 two and three cylinder carburetor engines [excludes all 1999 1200(1165cc) engines]
    Kit part numbers 2873091, 2873022, 2873355, 2873356
    2873022 1996-1997 Hurricane and twin carburetor 1998-1999
    2873355 1996-1997 twin carburetor except Hurricane
    2873091 1996-1998 three cylinder 900cc and 1050cc engines
    2873356 1999 1050cc three cylinder engines only
    The original factory ignition in these 1996-1999 engines was not reliable over time, so Polaris issued ignition update kits.
    '...It WILL fail eventually...'
    Each kit includes an updated CDI module, magneto stator, and for the two cylinder engines a new Ignition Coil.

    You can check whether you already have the update by checking your CDI part number.
    Notes:
    CDI part number 4010885, may actually be 4010447 (900 & 1050 Ignition Update Kit 2873091)
    Apparently the better choice for all 1996-1999 two cylinder engines is the Hurricane update kit 2873022

    Once you install the ignition update kit, you must use 2000 and later Service Manual specs when diagnosing the ignition system and stator coils.

    How do I tell whether I have an updated or original type domestic ignition?
    What does a non-updated two cylinder Ignition coil look like?
    How do I test old and new domestic red engine CDI, Magneto and Ignition coils?

  6. #6
    I love water's Avatar
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    Is it better to buy aftermarket ignition.

  7. #7
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    polaris issued a update kit for these machines.. i have a sl1050 i just had a update kit put in. search john zigler on here hes a great guy,

    but i would check for spark first.. take each boot off the plug wire and see if there is corrosion, if so cut the wire back a bit.. i also had too do this before the ignition went bad..

    i would test every thing that was mentiond before you picked up a update kit.. they are over 300 bucks,

  8. #8

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    i had an issue at one time like this ,

    my spark plugs were way gapped out at like 60k they need to be at 28-32k

    plus what kinda spark plug are you useing ?

  9. #9
    I love water's Avatar
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    NGK br8es

  10. #10

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    you sure its not bpr8es ? i use the 7 series they run a little hotter

    thats sucks your useing one with an r that would be an easy fix

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