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Exact vintage of this Edison-Splitdorf RM magneto?

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  • Exact vintage of this Edison-Splitdorf RM magneto?

    Lost my notes, Folks,...

    Can anyone tell me the exact applications for this Edison-Splitdorf RM magneto?

    EDSPLTRM.jpg

    Please note that it has hex fasteners on either side of the nameplate (post-War?).

    Many thanks in advance as always,..

    ....Cotten
    Last edited by T. Cotten; 01-21-2021, 02:15 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  • #3
    I'm so confused, Folks,...

    The ebay tag is different..

    RMtag2.jpg


    And here is one I believe is perhaps earlier:

    magneto_edison-splitdorf_02.jpg
    (Thanks again to Eric Mathieu!)

    I need to know because I know somebody needs it more than me.

    Especially since I just had it serviced, and mags don't like to sit.

    ....Cotten
    Last edited by T. Cotten; 01-21-2021, 03:16 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

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    • #4
      35CDB6F3-45EE-4D1D-ACF2-E6D94739B54F.jpeg

      ...this is the Ebay one on the above link
      Pisten Bulley is Harry Roberts in Vermont.

      Comment


      • #5
        Originally posted by pisten-bully View Post
        ...this is the Ebay one on the above link
        You're probably right, Harry!

        I had too many ebay pic 'snags' to pick from.

        So I'm safe to call the one I posted "post-'44"?

        My rebuilder says its serviceable, but could use a new rotor anyway.

        ...Cotten
        Last edited by T. Cotten; 01-21-2021, 03:36 PM.
        AMCA #776
        Dumpster Diver's Motto: Seek,... and Ye Shall Find!

        Comment


        • #6
          Originally posted by T. Cotten View Post
          You're probably right, Harry!
          Cotten, I only found that Ebay sale out of curiosity because that magneto looked familiar, so I put up the link to that sale because lo and behold it had the same type of RM 04051. The seller is listed as indiannut from Largo, FL and that is most likely Danny Weil, He lists it as 1940 to 1953. If it is Danny Weil then the information can be relied on, I think, because he's a long time Indian guy, smart, and knows his stuff.

          Of course, it is Ebay!

          Pisten Bulley is Harry Roberts in Vermont.

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          • #7
            I guess this one, Harry,...

            To be 1944 and later.

            Did they really make magneto models after '48, Folks?

            Thanks again in advance,

            ..Cotten
            AMCA #776
            Dumpster Diver's Motto: Seek,... and Ye Shall Find!

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            • #8
              Golly Folks,...

              Nobody can tell me if they made mag models after '48?..

              Does that mean nobody can tell me a fair price either?

              Its available, with the idler gears.

              ....Cotten
              AMCA #776
              Dumpster Diver's Motto: Seek,... and Ye Shall Find!

              Comment


              • #9
                Cotten,

                If it helps.... on the ID tag, type 04051 is CW rotation for Chief. Scout is CCW and the correct ID would be 04052. The letter P after designates a plain bushing (bronze) for the rotating gear / cam assembly. Some other models used a needle bearing and had no letter designation after the number I believe.

                As to years, I believe it started in 1940 but I don't know how late they offered a mag model. However, it was my understanding that all Bonneville models (chief and scout) were equipped with magneto ignition only from the factory. So, when was the last Bonneville model?

                Price, around $500.00 if it is complete, works and somebody needs one. Most guys throw them away because they are harder to start! The mag models required a different starter gear ratio to spin the mag fast enough to get a good spark when starting. Add a tight motor and higher compression and that gets harder. However I believe the Bonneville cams had enough overlap that they were not that hard to turn over. I suspect running stock cams would make a motor harder to start.

                And let the banter begin....

                Gene

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                • #10
                  I've got a lot more in it than that, Gene!

                  ,,,,Cotten
                  AMCA #776
                  Dumpster Diver's Motto: Seek,... and Ye Shall Find!

                  Comment


                  • #11
                    Originally posted by T. Cotten View Post
                    Lost my notes, Folks,...

                    Can anyone tell me the exact applications for this Edison-Splitdorf RM magneto?

                    EDSPLTRM.jpg

                    Please note that it has hex fasteners on either side of the nameplate (post-War?).

                    Many thanks in advance as always,..

                    ....Cotten
                    I believe your Rm 4 cyclinder mag would be years 40-42.
                    Tom

                    Comment


                    • #12
                      Its only got two sockets on the cap, Tom!

                      My magneto man, who is a local I have known for many years, just serviced it, but he didn't leave me his phone number!

                      Have to catch him at the grocery again, and ask the rotation, because I don't want open it, and I know I shouldn't spin the gear.

                      ....Cotten
                      AMCA #776
                      Dumpster Diver's Motto: Seek,... and Ye Shall Find!

                      Comment


                      • #13
                        I thought I might be missing something.The Indiannut listings was what I thought was chief.
                        Looking at my self example its like yours with two dummy caps.
                        I think gharper answered the rotation question.
                        Mine is for chief ending in 1
                        Tom

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                        • #14
                          Originally posted by tfburke3 View Post
                          ...I think gharper answered the rotation question.
                          Mine is for chief ending in 1
                          Tom
                          I see that now, Thanks Gene and Tom!

                          The W confused me. I'm easily confused.

                          I guess its not eating anything on the shelf, but mags don't like to sit, and its fresh (although the rotor could be a little fresher, I'm told).

                          ....Cotten
                          AMCA #776
                          Dumpster Diver's Motto: Seek,... and Ye Shall Find!

                          Comment


                          • #15
                            I dont know what the W is for but mine is also prefix W.It came from a pretty original 47 chief mag.not Bonn. in the 2500vin range.

                            Tom

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