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  1. R

    1973 mercruiser 120 HP no spark

    Ampress
  2. R

    1973 mercruiser 120 HP no spark

    1st I so appreciate the help so much. No the R post to coil, did have electronic ignition and I thought that was the issue. Yes all brown wires are not producing, I did put a double solenoid for the trim motor. There's also a battery isolator if that makes a difference??
  3. R

    1973 mercruiser 120 HP no spark

    So I have a wire from the R post that reads 12.35 key on and start I have 10.65. All brown are no reading with key on. In start position the brown are still no reading. There's also a brown and tan wire connected. If it helps at all I did take some pics. One double brown, one brown and tan and a...
  4. R

    1973 mercruiser 120 HP no spark

    So the points do open and close, however I burned up the points I think that's what the smoke was from the plastic. On the coil I have ignition wire going to negative post on coil, the condenser going to negative post and r on starter solenoid on negative post. On positive post have brown and...
  5. R

    1973 mercruiser 120 HP no spark

  6. R

    1973 mercruiser 120 HP no spark

    I had electronic ignition but not knowing electrical I thought if I went to a point system I would be able to fix. That being said the reading I got at the coil with key in on position was 12.45 and 8.95 in start, I used a trigger switch and put negative lead to negative post on battery.
  7. R

    1973 mercruiser 120 HP no spark

    I have a 1973 mercruiser that I changed the trim motor from a single solenoid to a double solenoid the trim is working but I am not getting any spark and I am lost.
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