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  1. J

    1969 Mercury 7.5 - no spark

    We have spark! Here are the causes: In no particular order, oxidized points contact surfaces (file the points and check with ohm meter), and factory paint overspray over the flywheel magnets and the coil magnetic pickup areas (3 per coil). I used sandpaper to remove the paint. Now, nice blue...
  2. J

    1969 Mercury 7.5 - no spark

    I have acquired a Mercury 7.5 outboard from an estate sale that appears to have been used very little. The problem is that it has no spark. Flywheel removal revealed an ignition system that appears immaculate. Serial is 2636xxx which indicates an early 1969 model. Points were glazed and...
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