Michael, thanks for your help with the firing order spec page. I just pulled the boat out of winter storage and removed the Pro-Tech ignition in favor of a DUI distributor. I am not a mechanic by any means, but I was able to drop in the new distributor, wire up the 2 wires to the cap, and got it fired up on my own. I set the timing between 10-12btdc (closer to 12), and I am amazed at how much better it starts and idles when cold!! Thanks again for the info