Home Forum Ask A Member Evinrude 15 hp Big Twin Electric conversion

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  • #244725
    Shamus
    Participant

      Greetings! I have a good condition 1951-52 25hp Big Twin. It came with a 1954 Dunphy Dolphin Deluxe runabout that I have been restoring. The boat itself seems to be wired for remote electric start (push button ignition, shutoff switch, ignition lock and 6v dry cell battery) However, the motor does not appear to be equipped with an electric starter or any harness, but was set up for remote throtttle and shifting and steering. I’ve browsed around on the internet and there doesn’t seem to be any clear info on whether or not such a conversion is even possible, let alone practical. Has anyone had any experience in such an endeavor?

      Best,
      John Egelhof

      IMG_6142

      • This topic was modified 3 years, 8 months ago by Mumbles.
      #244732
      2fast4me
      Participant

        ’54 was the first year for the electrified 25 HP Big Twin. Yours might be backwards compatible. Therefore ’54 flywheel, starter and bracket may work on what you have. Others more knowledgeable than i Will hopefully correct my information. I can post pictures of the ’54 Big Twin Electric i have at home.

        2Fast4Me

        #244733
        outboardnut
        Participant

          US Member

          For what its worth
          The starter bracket would have go where the vacuum switch is on your motor.
          I’m thinking -no but I am no expert
          Would the hood have to be altered to accommodate the size of the starter?

          powerhead-1954-25-hp-RDE-16

          #244736
          frankr
          Participant

            US MEMBER PAY BY CHECK

            Yes, the electric hood has a big bulge to accommodate the starter

            #244742
            Shamus
            Participant

              I’d like to see those pictures! Thanks

              #244743
              Shamus
              Participant

                Are the hoods interchangeable? If not this project seems to be unworkable. Thanks.

                #244744
                Shamus
                Participant

                  Thanks for the diagrams. Very helpful!

                  #244949
                  olcah
                  Participant

                    US Member

                    Shamus, Forgive my shaky memory but a year or two ago I had two 54 Evinrude 25 HP . One Evinrude was a parts motor and it had the electric start. The other running motor did not have electric start. I figured I could maybe use the bracket, flywheel, and hood from that motor and put electric start onto the running Evinrude. The bracket is supported mostly by one long bolt that screws into a boss cast onto the powerhead . There was no boss on the non electric motor to accept the bolt. I concluded that electric start motors were built that way at the factory and no backfit was possible for 1954 Big twins.
                    I hope another member chimes in to correct me but I expect that Johnson could be the same. Take a good look at the powerhead photos. The added boss has a qtip in the hole. .

                    electric-start

                    non-electric

                    #244961
                    Mumbles
                    Participant

                      I don’t know who or where but someone, somewhere, once hooked up a chain driver starter to their motor.

                      The starter bracket fits the starter and the block good so I wonder if this was an aftermarket kit including a ratchet for the flywheel gear.

                      RD-Electric-Start-Chain-Drive

                      RD-Electric-Start-2-Chain-Drive

                      • This reply was modified 3 years, 8 months ago by Mumbles.
                      • This reply was modified 3 years, 8 months ago by Mumbles.
                      #244985
                      frankr
                      Participant

                        US MEMBER PAY BY CHECK

                        Come to think of it, I’ve seen those old chain drive starters back in “The Day”

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