1936/37 Evinrude Sportsman 2.5hp

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    gjonz

    US Member - 1 Year
    Replies: 181
    Topics: 16
    #1401

    What kind of modern spark plugs should I use?

    Thx!

    Greg

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    legendre


    Replies: 389
    Topics: 8
    #15292

    NGK! =P

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    gjonz

    US Member - 1 Year
    Replies: 181
    Topics: 16
    #15293

    Since it is a nice fresh restoration…and I’m trying to stay original…how about Champions…like I always use.

    Anyone know what a good modern Champion plug would be that works in this.

    Thanks!

    Mumbles
    Mumbles

    Canada Member - 2 Years
    Replies: 4549
    Topics: 432
    #15296

    The original plug was a J1-15 so you may have to do a Google search to find a modern equivalent.

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    legendre


    Replies: 389
    Topics: 8
    #15299

    Hey Greg,

    quote gjonz:

    What kind of modern spark plugs should I use?

    Thx!

    Greg

    What, if anything, was in the hole when you got the motor?

    I’m sure someone who knows will eventually show-up with data, but if not, you’ll just have to pin down the basics (thread size / pitch / reach) and pick a plug in a middling heat range – like an NGK 6 or 7 or a Champion 6 and try it.

    On these old motors, just about anything (heat range-wise) should be OK for initial shake-down runs in a tank, etc.

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    garry-in-michigan

    Lifetime Member
    Replies: 3567
    Topics: 31
    #15461

    The more modern short Champion spark plugs begin there part number with "C". A following "C" indicates a copper core. which is advertised as having better heat tolerance and an extended heat range.

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