tach for ’66 Evinrude 40hp Lark

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  • April 3, 2021 at 1:44 pm #235523
    Rocketman
    Participant

      I want to add a tach to the dash. Does anyone know of one or an adapter/pulse generator that will work with a generator outboard?

      I found one that matches the existing speedo. I’m asking advice on compatibility with the 2 cylinder magneto breaker ignition engine that has a generator rather than a rectifier. There are connections for Gnd, Ign, and Send. Gnd and Ign are obvious, the Send I assume, is for the tach wire connected to the safety cut-out switch which is wired to one of the points. Correct? There is a dial with settings marked A, B, C. Which of these should it be set to? Would that be for 2, 4, 6 cylinder engines? And is this the type of tach for this type of electrical system? See pic. Thanks!

      tach-s-l1600

      • This topic was modified 4 years, 3 months ago by Rocketman.
      • This topic was modified 4 years, 3 months ago by Rocketman.
      • This topic was modified 4 years, 3 months ago by Rocketman.
      April 3, 2021 at 5:44 pm #235564
      fleetwin
      Participant

        US Member

        Sorry, I really don’t think this tach will work on your old 40hp. This tach uses pulses from the alternator to signal RPM. The ABC designation/adjustments are for different styles of alternators… Your 40hp has a generator…

        April 3, 2021 at 5:57 pm #235565
        Rocketman
        Participant

          I think you are right. After I posted I enlarged the pic and saw the word “ALTERNATOR” on the label on the back. Oh well, and thanks for the reply.

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