1938 Sea King help needed.

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  • October 26, 2019 at 9:01 pm #185942
    fifty20ne
    Participant

      US Member

      I need some help with determining the correct Champion spark plug for the following 1938 Sea King models. 447 (1.8hp) single. 449 (2.8 hp) twin 499 (4.2hp) twin.

      October 27, 2019 at 12:10 am #185944
      garry-in-michigan
      Participant

        Lifetime Member

        I come up with a Champion D16 (516)

        October 27, 2019 at 6:48 am #185950
        hiram1914
        Participant

          I came up with a Champion D14 gapped at .025 for the 4.2hp (499).

          October 27, 2019 at 10:15 pm #185996
          fifty20ne
          Participant

            US Member

            Guys, thanks for the information, but I am trying to find the original O:E plugs that they left the factory with? The modern D-14 or D-16 plugs usually do not have removable threaded tips like the old brass tops do. The D-16 is equivalent to a C-7 correct? Not sure about a D-14 equivalent.

            BA1109F3-CCB4-4480-93C1-5503548A6E2F

            D21DB84B-8700-4BBA-999E-D4E54B4AA497

            ACEE23EA-9FEF-48A0-B103-58A6656504C7

            • This reply was modified 4 years, 6 months ago by Mumbles.
            October 28, 2019 at 10:57 am #186016
            The Boat House
            Participant

              .

              October 28, 2019 at 10:38 pm #186059
              garry-in-michigan
              Participant

                Lifetime Member

                Yes – Champion C7 was the original spark plug, also used in the Elto Ace and Evinrude Sportsman & Sportwin.

                October 29, 2019 at 12:49 pm #186083
                Randy in Tampa
                Participant

                  Would that not be equal to the NGK AB6? Or would it be AB7 ?🤔

                  Rotary valve Johnson’s Rule!

                  October 29, 2019 at 9:13 pm #186127
                  fifty20ne
                  Participant

                    US Member

                    Champion C-7 Equivalent spark plugs.

                    https://www.sparkplug-crossreference.com/convert/CHAMP_PN/C7

                    I used a 8-32 die and chased the threads on the AC Delco C86 spark plugs I had and installed on Model 499 (see pic)

                    The Model 449 (2.8 HP) had RIVERSIDE (WARDS) 4C plugs installed?

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