Checked the harness to coils, seemed to be good. changed the #4 cylinder coil with the bottom one, it fired. but the new coil that I switch it with on the bottom, it didn't fire. checked the new coil again still check fine. Now I am really lost.
I have a 2004 200hp mercury 2 stroke. I had a ignition coil go bad. got the replacement part. installed it and still now spark to the plug. Used multi meter and check the coil it tested good. Where do I go from there? What is the next step to take?