Took the boat out yesterday. On the 6 (or so) mile ride back to the trailer I held her at WOT. This was just after sunset, so it was getting dark. Once I arrived I turned around to take a look at the engine and the headers were glowing bright orange! Is this normal, or is it an indication that the engine may be too rich or too lean or something? Timing is set at 36* @ 2000 rpm, creeping up to 38* at 5000rpm. I was turning 4500-5000 the whole time. Yes, the headers are run dry.