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1989 Mercury 45 hp (Classic 50) spark issue

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  • 1989 Mercury 45 hp (Classic 50) spark issue

    1989 45 hp Mercury 4 cylinder has spark on the bottom 2 cylinders only. I have viewed numerous posts regarding trouble shooting, but none that cover my set up. I have the red stator with the adapter. The wires coming from the stator are 2 yellow and a green/white, white green. The green/ white and the white green go to an adapter. The adapter has a blue/white and a blue wire that go to the switch box (no red, red/ white). I believe this is the original set up. I have the Seloc manual which does not cover my setup. I am trying to determine if the stator, switch box or adapter is bad. Is there any test for the adapter? I have determined that all 4 coils are good. At one point I was able to get spark to switch to top 2 cylinders but can't remember which wires I swapped to make that happen. Any trouble shooting tips would be helpful.

  • #2
    Re: 1989 Mercury 45 hp (Classic 50) spark issue

    Check about page 70 of the CDI Troubleshooting Guide,


    Look under the heading 'Red Stator Kit' and you will find the wires that you have.


    • #3
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      Re: 1989 Mercury 45 hp (Classic 50) spark issue

      classic symptm of the classic fifty switchbox gone bad but .