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Thread: 6V Coil For 6 cylinder petrol??

  1. #1
    Join Date
    Dec 2016
    Location
    Northamptonshire
    Posts
    15

    Default 6V Coil For 6 cylinder petrol??

    Hello all,

    Just putting our Mack NM back to 6V after the previous owners attempted conversion. Are there different ignition coils for different purposes I.E/ motorcycles or trucks? Or is it one size fits all?

    Any help gratefully revived

    Thanks

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  3. #2

    Default Re: 6V Coil For 6 cylinder petrol??

    The NM Mack should run a standard 6 volt coil.
    Being war time vehicle as much as possible was interchangeable with other US vehicles.
    6 volt Jeep coil will work fine.
    That model Mack had 12 volt supplied to the coil and starter while cranking and then when the motor started running it went back to 6 volts.

    Two batteries used with a series / parallel switch for change over for starting.

    12 volt though a 6 volt coil just while cranking the motor for a short time will not hurt it.
    Last edited by 101 Ron; 10-04-2017 at 03:51.

  4. #3
    Join Date
    Dec 2016
    Location
    Northamptonshire
    Posts
    15

    Default Re: 6V Coil For 6 cylinder petrol??

    Quote Originally Posted by 101 Ron View Post
    The NM Mack should run a standard 6 volt coil.
    Being war time vehicle as much as possible was interchangeable with other US vehicles.
    6 volt Jeep coil will work fine.
    That model Mack had 12 volt supplied to the coil and starter while cranking and then when the motor started running it went back to 6 volts.

    Two batteries used with a series / parallel switch for change over for starting.

    12 volt though a 6 volt coil just while cranking the motor for a short time will not hurt it.

    Thank you very much for your help!

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