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Mercury low oil sensor question.

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  • Mercury low oil sensor question.

    I recently bought a 1990 90 horse mercury with oil injection. Whenever I plug in the sensor that is coming from the oil tank, there is a loud constant beep when I turn the key on. I read where this is a low oil sensor, but I filled the tank, and it still does it. Any ideas on what might be the problem on this? Thanks


  • #2
    Re: Mercury low oil sensor question.

    The magnet came off the float, you will need a new tank as it's not repairable

    Comment



    • #3
      Re: Mercury low oil sensor question.

      i have a 91 ranger with a 150 blackmax and has recently started beeping continously when running down the lake. i have been told its the sensor or the module. i put a tester on my sensor and seems to work but have read that the washer is supposed to be attached to the float and mine is not.what should i do and do i also have to get a new sensor for my oil resovoir on my engine? THANK YOU--superfluke

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      • #4
        Re: Mercury low oil sensor question.

        Its definitly a very annoying beep. An idiot light might've been better. I disconnected the buzzer. Probably not the smartest thing to do, but as long as I keep an eye on the oil level, and the tell tale, the motor ought to be ok.

        I do worry though, i've heard of the oil injection going out on these though..
        15' 1974 Canbar Crestliner tri-hull boat.

        90HP 1989 Mercury 2 stroke, 3 cylinder oil injection.

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        • #5
          Re: Mercury low oil sensor question.

          Yep, if the alarm goes off, disconnect the buzzer. If an idiot light keeps coming on, just cut the wire.

          When the power head grenades, it'll be the oil injection system's fault.

          Amazing logic displayed here.

          my 02
          John

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          • #6
            Re: Mercury low oil sensor question.

            Originally posted by Timothy's crestliner View Post
            Its definitly a very annoying beep. An idiot light might've been better. I disconnected the buzzer. Probably not the smartest thing to do, but as long as I keep an eye on the oil level, and the tell tale, the motor ought to be ok.

            I do worry though, i've heard of the oil injection going out on these though..
            ours was doing the same thing and it needed an new impeller

            Comment



            • #7
              Re: Mercury low oil sensor question.

              Originally posted by superfluke View Post
              i have a 91 ranger with a 150 blackmax and has recently started beeping continously when running down the lake. i have been told its the sensor or the module. i put a tester on my sensor and seems to work but have read that the washer is supposed to be attached to the float and mine is not.what should i do and do i also have to get a new sensor for my oil resovoir on my engine? THANK YOU--superfluke
              Superfluke,

              Please start your own thread. The oil injection systems on the 90 and the V6s are COMPLETELY different.

              Chris...........
              The world takes on a whole new perspective when viewed from 100' below...



              1972 Bertram 'Bahia Mar' 20
              2006 Mercruiser 4.3MPI (0W617679) w/Alpha 1 Gen II (0W829301)
              **
              Please don't send service questions in private messages. That's what the forum is for. Messages of thanks, always accepted.
              **
              Member of the month - April 2013. http://www.iboats.com/blog/achris-member-of-the-month/

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              • #8
                Re: Mercury low oil sensor question.

                Originally posted by Laddies View Post
                The magnet came off the float, you will need a new tank as it's not repairable
                Laddies is right. I had to get a new tank for my 40 hp Mercury

                Comment



                • #9
                  Re: Mercury low oil sensor question.

                  Originally posted by j_martin View Post
                  Yep, if the alarm goes off, disconnect the buzzer. If an idiot light keeps coming on, just cut the wire.

                  When the power head grenades, it'll be the oil injection system's fault.

                  Amazing logic displayed here.

                  my 02
                  John
                  Aw common J. Sounds like a remark I would make.

                  Mark
                  Last edited by Texasmark; March 17th, 2010, 11:11 AM. Reason: error
                  If you are new to boating or have a new boat, a knowledgeable friend could show you how to operate your boat and save you a lot of grief, maybe some money, and maybe your life.

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