Hi Kent,
Be sure to let the engine warm up good. I have noticed that my DA is kinda cold natured which is good, but it has to warm up to set the carb right. I set mine just a bit rich on the bottom where transition is good and there are no dead spots. I noticed that there was one place in there that it didn't want to go clean through...a little over a 1/4 throttle and after the timing was retarded it went through cleanly. I had to readjust the bottom a hair richer also. This is what ***I think*** is causing the engine to idle lower and more reliably. I really hope the very experienced engine gurus get in on this thread as I really need to understand the way part of this. You may want to try it on your engine. You can always put it back where it was. Be sure and mark with a real sharp pencil where the edge of the sensor was so you can put it back exactly where it was if need be. Just be careful and if it don't sound right, put it back. I really don't wanna recommend this though until, like I said in the above post, we understand this more. It's probably not a real big deal, but I don't recommend things until I understand why, and am positive that what I post is something that won't cause ill effects. These gas motors get into the high dollar category and I wouldn't want anybody to have trouble with something they spent their hard earned money on because of something I started.