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VRO pump & tachometer wire connection.

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  • VRO pump & tachometer wire connection.

    I'm in the middle of a possible VRO problem related to over oiling and have not yet had time to run the necessary tests on my 150 Johnson 1995. I also have a non-working tachometer and have been reading posts related to the gray wire and the rectifer. Is it possible that these two problems are related? I believe the gray wire from the VRO connects directly to the gray rectifier wire and the purple wires connect the vro to the rectifier. Do the VRO wires have anything to do with regulating the oil and fuel or are they simply "sends" for warning horns?


  • #2
    Re: VRO pump & tachometer wire connection.

    If your Tach does not work, make sure your charging system is working. Check the battery volts with the engine off and then again with it running. You should see an increase in voltage while running. If not, the rectifier is probably shot. The wiring has nothing to do with the VRO regulating oil or fuel supply to the motor. They are for warning horns only.
    Rick

    "Boating is Life...All the rest is just Details"

    2007 Bentley 200 Cruise
    2007 Merc. 90 4 stroke

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    • #3
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      Re: VRO pump & tachometer wire connection.

      Thank you Rick, I'll check it out with my volt meter. Wayne

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