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    • Cummins Marine Forum Topics
    • Cummings 210HP Twin engine; RPM tachometer

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 5 years ago

      September 3, 2018 at 2:55 am HI everyone, I am pretty much new to power boating; so you can guess I do not know much about engines and instrumentation. Everything was running smoothly until I had my engines serviced. When I start them the RPM tachometer for one engine fluctuates wildly from 600 to 2000 RPM, also under load. The engine runs fine. I have ruled out a faulty tachometer because the one in the boat and the one on the flybridge are doing the same thing. Has anyb…

      Started by: Klaus Scheckel in: Instrumentation & Electronics

      1 Reply
      September 3, 2018 at 12:06 pm What you have that sends the signal to the tach is either faulty, needs to be reset, or has a bad wire connection.. Most likely you have a magnetic pickup??.. How To Install a Magnetic Pickup to Drive a Tachometer Magnetic Switch Location on your B Series Cummins

      Last Post by: Tony Athens posted: 5 years ago

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