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  1. W

    Replaced engine now no spark

    I'm pretty sure you can, if I understand the way the circuit works, the negative side of the ignition coil feeds then ICM. I did some more testing last, night and the way im reading the purple powers the coil, exciter, and the carb choke need to double check that last one but I did a multi...
  2. W

    Replaced engine now no spark

    I have a 1995 mercruiser carb 5.7 alpha one gen 2 combo with the thunderbolt 5 ignition original engine serial number 0F423587. system, that I recently replaced with a vortec reman unit because of a gutter that was created between cylinders 3-5, Before I realized the actual issue with this boat...
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