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  1. #1

    How do i test a cdi.

    I think my cdi is out. I test it using the manual but the spec was not clear. I said the meter should read open for tekytonix dmm155 meter and high meg-ohm for other. I have a other. I got reading for ~1500 to ~500. what should it read for a 98 slth cdi

  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Jul 2007
    near Toronto, Canada
    There is no direct test for a CDI. The procedure is to test everything around the CDI. If all that is correct, and the engine doesn't run, then you replace the CDI.

    There are several ohm tests for the magneto stator.

    What exactly did you test, and what were the results?

    Polaris Domestic (red) engine

    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?

    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.
    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

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