Johnson MD15 sparkplug replacement

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  • August 23, 2016 at 12:59 am #5044
    nabmd
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      US MEMBER PAY BY CHECK

      I have a 1940 Johnson MD15, 1.5HP, that needs a new sparkplug. It came with what looks like the original Champion J8. The crossover replacement is a J8C; but it doesn’t fit under the rear cowl; too tall by approx. 1/2". Any recommendations for a new plug? I won’t make it back to the parts store before the wkend. thanks for any help.

      August 23, 2016 at 4:39 am #42553
      garry-in-michigan
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        Lifetime Member


        I believe the short (bantom) version was a CJ-8 .         . . 😉

        Garry

        August 24, 2016 at 11:06 am #42596
        nabmd
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          US MEMBER PAY BY CHECK

          Thanks! It should be ready to lake test this weekend.

          August 27, 2016 at 3:38 am #42745
          Mumbles
          Participant

            This chart might help as it shows the NGK equivalents. ☺

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