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1979 Mercury 115 inline 6, need help ID'ing engine wiring

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  • 1979 Mercury 115 inline 6, need help ID'ing engine wiring

    K, had the cover off today doing some electrical work and trying to ID all these wires. couple are disconnected and would like to know what they are. Plus any other knowledge on this wiring setup would be helpful

    These 2 wires are coming out of the loom running into the motor


    These 2 are off the harness connection on the engine side


    This black/yellow wire is tied up to this green wire


    And am I right in guessing this is the main engine fuse? Runs to the starter solenoid
    Dallas:
    1982 Hydrostream Ventura- 16'6", 77' Johnson 140, just a blast to drive
    1991 Sunbird Corsair 218- 22" cuddy, sold
    1990 SeaRay 160- 79.5 Mercury 115 6cyl-sold
    sigpic


  • #2
    Re: 1979 Mercury 115 inline 6, need help ID'ing engine wiring

    I think it says 79.5 on the engine, and by looking online at wiring I'm guessing this is an 80 model, am I correct?
    Dallas:
    1982 Hydrostream Ventura- 16'6", 77' Johnson 140, just a blast to drive
    1991 Sunbird Corsair 218- 22" cuddy, sold
    1990 SeaRay 160- 79.5 Mercury 115 6cyl-sold
    sigpic

    Comment



    • #3
      Re: 1979 Mercury 115 inline 6, need help ID'ing engine wiring

      What is the engine s/n?

      Mercury Engine colour code:

      http://www.maxrules.com/fixmercwiringcodes.html

      Gerry

      Comment



      • #4
        Re: 1979 Mercury 115 inline 6, need help ID'ing engine wiring

        I have the 1979 115hp. If you have the Seloc Merury repair manual . it has all the information on this motor. If youhave the serial# on the motor, ioats can probably tell you what you need. I bought a internal cable for mine and I think it was part# 85532 It matched-up perfectly

        Comment



        • #5
          Re: 1979 Mercury 115 inline 6, need help ID'ing engine wiring

          Alright where is the serial number? Since I have the black/yellow wires I'm guessing this is an 80's model. It says 79.5 on the timing card. They had the black/yellow wire ran to a green wire running to this little round thing (mercury switch?), which had a green wire running off of it running back to the grey wire out of the harness, and each ignition box had a wire running into this same grey wire (not factory obviously lol). I tested the coils with my meter while spinning over and I'm getting alot of negative readings, is that normal on these? And before you ask, yes I did have positive on positive and vice versa
          Dallas:
          1982 Hydrostream Ventura- 16'6", 77' Johnson 140, just a blast to drive
          1991 Sunbird Corsair 218- 22" cuddy, sold
          1990 SeaRay 160- 79.5 Mercury 115 6cyl-sold
          sigpic

          Comment



          • #6
            Re: 1979 Mercury 115 inline 6, need help ID'ing engine wiring

            OK, You have the ADI ignition system. Disconnect that mercury switch. Next disconnect the black/yellow wire at the switchboxes. See if spark returns. If not go on the CDI Electronics web site and run the troubleshooting test for your motor.

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