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    78 Merc 140 hp inline 6 keeps fouling plugs

    Re: 78 Merc 140 hp inline 6 keeps fouling plugs I found this wire with the other wires it was corroded looks like its red and after testing it its positive lights up on both connections when tested
  2. R

    78 Merc 140 hp inline 6 keeps fouling plugs

    Re: 78 Merc 140 hp inline 6 keeps fouling plugs hi Chris I took a look at the wireing,the guy I purchase the boat had done the rewiring on this motor.The wires you told me to look at are ran togather and attached to the +12volt that run to the distributor.Will that cause any problem.
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