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Type of Tach Sender 270hp Cummins-gctid382557

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    Type of Tach Sender 270hp Cummins-gctid382557

    We have a 4087 motoryacht with Cummins 270 horse diesels. I want to put digital tachometers on the boat specifically aetna engineering. I believe the tach sender on this engine is a flywheel magnetic counting system, not a mechanical one. Can someone confirm that for me? Thanks in advance.

    Tom
    Tom Brooke
    MV Overexposure - 1999 4087
    MMSI - 367585640

    #2
    Tom, I believe you are correct- and that it uses a 163 tooth gear...

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      #3
      One option (a big thank you to Pete) is to purchase the DSL-1 from Dakota Digital. It connects to the W or stator port of the alternator and turns stator pulses into tachometer signals for gas engines. There are plenty of digital tachometers available for gas engines, so your choices will increase dramatically on gague size, type, manufacturer, etc.

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        #4
        They have both mechanical and magnetic tape based sensors.

        Aetna engineering:

        http://www.google.com/url?sa=t&rct=j...Jae6M56He_Q7kQ

        Instructions:

        http://www.aetnaengineering.com/inst...structions.asp
        Pat says: DO-IT-RIGHT THE FIRST TIME!

        Bayliner 3870 "ALASKA33)
        Twin 350 GM power
        Located in Seward, AK
        Retired marine surveyor

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          #5
          Forgot all about that one, Ed!

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