Correct spark plug?

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  • elgin2

    US Member - 2 Years
    Replies: 129
    Topics: 28
    #246780

    I have a `97 25hp Johnson with a RJC8 and a JC8 spark plug. Which is the correct plug or are either the correct plug?


    Buccaneer

    US Member - 1 Year
    Replies: 5085
    Topics: 831
    #246781

    Did you Look on Marine Engine? Maybe you can figure it out from there.

    http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1997&hp=25&model=BE25AREUR

    Prepare to be boarded!


    Mumbles

    Canada Member - 2 Years
    Replies: 5171
    Topics: 276
    #246785

    Two cylinder or three cylinder?

    Two cylinder call for Champion QL77JC4, QL82C, or L78V. NGK equivalents would be BZ7HS-10, BR7HS, or BUHW-2.

    Three cylinder motors use QL86C or BR6HS plugs.

    NGK plug numbers with a -10 suffix means the plug has been gapped at the factory to 1mm, or .040″.


    outbdnut2

    US Member - 2 Years
    Replies: 1616
    Topics: 83
    #246803

    I recommend the NGK BZ7HS-10. I’ve found Champion’s quality to be questionable in recent years.
    Dave


    elgin2

    US Member - 2 Years
    Replies: 129
    Topics: 28
    #246813

    I wish it was 3 cylinders. They’re about as rare as hens teeth. It’s a twin.

    Two cylinder or three cylinder?

    Two cylinder call for Champion QL77JC4, QL82C, or L78V. NGK equivalents would be BZ7HS-10, BR7HS, or BUHW-2.

    Three cylinder motors use QL86C or BR6HS plugs.

    NGK plug numbers with a -10 suffix means the plug has been gapped at the factory to 1mm, or .040″.

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