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  1. G

    4.3 Mercruiser ignition control module Thunderbolt IV

    Well then I'm going to get it timed professionally. Thank you
  2. G

    4.3 Mercruiser ignition control module Thunderbolt IV

    Scott, That would make for a slow crank?
  3. G

    4.3 Mercruiser ignition control module Thunderbolt IV

    Lou, I am pretty sure they are. I will double check this evening when I get home. When I took the harness apart the purple wire fell out. So I just pushed it back in and ses to be all connected to the pins. PS I can't find in the manual what the colors mean on the ignition module. Can you please...
  4. G

    4.3 Mercruiser ignition control module Thunderbolt IV

  5. G

    4.3 Mercruiser ignition control module Thunderbolt IV

    Good morning, I rebuilt lower end of my 1992 4.3. Thunderbolt IV.. I put back together the harness. Now when I have the Control Module attached to the triangle plate. It gives me a slow crank, When I unplug it, it give me a faster crank. Please HELP! Glen
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