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Recent content by Michaeln3162

  1. M

    74 mercury 850 no spark

    Hello and thanks I have a 74 mercury 850. I am having spark issues. Took the motor to the shop last year and they said the switch box was no good so I put a new cdi box and still didnt fix the issue. Motor has great compression with new ngk flat plugs. Boat will have spark when it wants to...
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