I ran my engine above idle for the first time today. While checking the mag's at 4000 RPM with the "A" ignition switch off, had a 100 rpm drop, with the "B" switch off had a 500 rpm drop and the engine was quite rough. I am not familiar with the Rotax engine and need some help/ideas. Just walked away from it this morning, will go out Monday and pull the cowling and see if there is anything obvious.
Dick
Dick