Re: 1936 Johnson A-80 4.5 hp Spark Plugs?

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November 8, 2017 at 11:04 pm #67156
RICHARD A. WHITE
Participant

    Lifetime Member

    The Old Outboard Book Volume 3 shows a 5MJ originally gapped at .03, That plug in the same book was replaced with a D9J

    So did some searching and found this:

    http://www.sparkplug-crossreference.com … AMP_PN/D9J

    http://www.richardsoutboardtools.com
    classicomctools@gmail.com