1945 Evinrude speeditwin spark plugs

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  • October 14, 2021 at 8:04 pm #248107
    trex014
    Participant

      Took the old iron to the Atwood meet in Ohio for a maiden voyage and the thing ran great!! For about 10 minutes… then only on one cylinder. One spark plug died on me so I’m looking for new ones. Luckily the KE7 backup ran flawlessly.

      What were the original plugs used and are they any good modern replacements?

      Snapchat-1429644391

      October 14, 2021 at 8:16 pm #248110
      retiredoz
      Participant

        My old Champion cat says for the 50-52 models use 5MJ or D-9J. Don’t know why it ignores the ’40’s models.

        • This reply was modified 3 years, 4 months ago by retiredoz.
        October 18, 2021 at 9:32 pm #248311
        george-emmanuel
        Participant

          US Member

          You can also use the NGK AB-6 or AB-7. The 6 is a little hotter plug.

          George

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