Yes, I find that once they're set they stay that way until either dirt or somebody with a screwdriver gets into them! Really much more reliable than most people would think. The big trick is getting them adjusted in the first place. I was mostly responding to his request on how to do that, with a little extra based on what I've seen. Sorry for getting a little testy on that last reply, I didn't have a great day, and after rereading my post I see that some of that came through. :rolleyes:

Getting both the ignition and the fuel system set up properly really helps to keep that big grin on the driver's face! The worst mess I had to fix was an old Lotus Elan. The owner or his buddy adjusted every screw on the carbs (twin side drafts) and linkage, then tried to add more ignition timing to compensate. Took me two hours of incremental adjustments to the carbs and timing to get it back to normal. Took about half the time just to find out what they had played with ("No, have no idea what the problem is, just started acting funny all by itself!")! Wouldn't run at all below 3000 rpm when it came in, and chugged happily out at 600 rpm after. No parts replaced!