I have an intermittent mis on ignition B. I've done quite a bit of troubleshooting, new plugs, plug cap test, loose are damaged wires etc. I finally swapped the 2 top, horizontal connectors for A and B ignition modules input. Well the condition moved from B to A. If I am reading the prints correctly, that proves that everything from the spark plugs, through the ignition module is good. The problem must be between the ignition horizontal plug to the trigger coil for B. Wiring looks good so I assume that I either have a bad trigger coil, or the air gap is out of specs. Has anyone successfully tested and adjusted trigger coil air gap with an installed engine? Thanks for you help..........Tom