Quote Originally Posted by Av8r3400 View Post
Another thing that I have discovered. These ignition units are not very powerful. I gap my NGK plugs (per Hal Stockman's recommendation) to .020-.024". I have found their performance is better than the .028-.032" recommended by Rotax.

Be sure to at least check them before installing. I have seen new plugs with up to .040" gap in the box.
This has been my practice since the early days. I can't remember why I went this way, but I am typically not an experimenter in things technical and so presume I heard it from some source - likely the early email lists. My climate is not as cold as some on the forum, but have camped overnight in sub freezing temps and flown in the Desert Southwest and have not had issues with cold starts, hot restarts or long periods between starts.