Autopsy of dead wires

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    crosbyman

    Canada Member - 1 Year
    Replies: 1292
    Topics: 175
    #187105

    working on my winter project 1965 MQ 9.5hp both coils read open from the plug booths

    one coil was bad (cracked) one coil was ok at 6.5kohms but….both plug wires were dead

    a quick autopsy showed why …. broken in the bend under the mag plate

    booth prick pins were shiny clean but same break identical corner on the wires !!

    snipping a quarter inch of to remove oxydation won’t always work

    IMG_0016

    • This topic was modified 1 month ago by Avatarcrosbyman.
    • This topic was modified 4 weeks, 1 day ago by MumblesMumbles.
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    Buccaneer
    Buccaneer

    US Member - 1 Year
    Replies: 3269
    Topics: 910
    #187109

    Good Detective Work!

    Prepare to be boarded!

    squierka39
    squierka39

    US Member - 2 Years
    Replies: 388
    Topics: 28
    #187117

    Plug wires are cheap, well reasonably cheap. May as well change them when you’ve got new coils going in. I’ve had dead ones that I couldn’t find the break.

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    crosbyman

    Canada Member - 1 Year
    Replies: 1292
    Topics: 175
    #187143

    no sweat I have 7mm metallic wire on hand………. all suspect parts will be replaced

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    crosbyman

    Canada Member - 1 Year
    Replies: 1292
    Topics: 175
    #187160

    this dormant MQ must have slept ….quite a while… found broken primary wire under the cracked coil

    mag plate all cleaned up & rebuilt except for caps and points which I suspect are quite good ..to be tested when ice is out next spring 🙂

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