The wonderful UL Power manual gives a clear drawing on how to install each spark plug wire on both ignition coils. BUT, they don't make a note that the numbers on the coils DON'T match. I spent all all re-wiring the spark plug wires and coils which meant cutting soldering and replacing all kinds of stuff. The GOOD news is that I fired it up and it runs AWESOME. I had help from the wife today and she got to learn how to install and remove Clecos. :)