I've been fighting with my 80 HP rotax 912. Here is the problem, when I do a mag check at 2500 or 3000, I seem to get pretty much the same rpm drop on both sides, about 150 rpm. If I do the mag check at 3500, one side drops about 150, and the other side drops about 500 rpm. I tied it off, and ran it to full throttle, and maybe 100 rpm drop at most on either side. Any ideas? Does it sound like ignition when it runs so smooth at full throttle compared to 3500 where it's very noticeable that it's not running right. It's not at all smooth at that rpm with both mags on. JImChuk