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  1. #1
    Frequent Poster AirJunky's Avatar
    Join Date
    Sep 2015
    Location
    Liberty Lake, WA
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    209

    How to test 550SX ignition wires & CDI

    I have a 93 550SX. It runs great but the previous owner managed to get the spark plug wires cooked on the exhaust at some point. Their taped up & seem to be working for now.

    So I managed to find a local guy blowing out some SX parts recently, including an Ebox. The plug wires are in a lot better condition than mine are. But the inside of the Ebox is pretty nasty... some corrosion & general filth. The cylinder at the end of the plug wires (I believe this is the CDI, correct?) seems to be fairly clean though. I could certainly just install it in my own Ebox & see how the jetski runs. But I'm wondering if there is an easy way to test this part.

    Also, where can I get a new Ebox gasket?

    TIA
    -
    Bill

    Current ride is an almost stock 94 550SX
    My JS550 build
    . - SOLD

  2. #2
    PWCToday Regular
    Join Date
    Sep 2010
    Location
    Kent, WA
    Age
    51
    Posts
    101

    Re: How to test 550SX ignition wires & CDI

    The cylinder at the end of the plug wires is the coil - not the CDI. The coil is pretty easy to test with a multimeter. You do have a service manual don't you? - cause that would explain it.

    The CDI is the electronic module with multiple wires going in to it (not the plug wires) and it's harder to test - probably easier to just install it and see if it runs.

    For the gasket you probably need OEM, maybe other readers would know if there's another source.
    Regards
    charger_john
    in Kent, WA.
    1996 JS750SXI (sold in 2017!), 2004 STX-12F, 2015 Superjet

  3. #3
    Frequent Poster AirJunky's Avatar
    Join Date
    Sep 2015
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    Liberty Lake, WA
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    209

    Re: How to test 550SX ignition wires & CDI

    Thanks for jumping in this, John. I don't have a manual.

    Looks like it should be around 5k-7.5k ohms between the plug leads, correct?
    -
    Bill

    Current ride is an almost stock 94 550SX
    My JS550 build
    . - SOLD

  4. #4
    Top Dog
    Join Date
    Oct 2006
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    under a ton of work
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    Re: How to test 550SX ignition wires & CDI

    the cdi and coil on 550's is one unit.
    Last edited by restosud; 11-03-2017 at 08:14 PM.

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