Yetti, I agree. Unfortunately it must be cheaper to deal with the few complaints that come in than to upgrade the directions, which are probably written and printed in another country. I say this because I've complained about poorly written Hobbico directions, and they're not about to make any changes because of me, or however many other people called in. They have people's time responding to emails budgeted in, but not changes to thousands of direction booklets printed. Does this make sense? Of course not, but that's bottom-line industry.

On the flip side, I have no prior RC plane experience. I did understand exactly what the directions meant, however, and can hear in my head exactly what I know I'm going to hear when I finally get this thing started (FRIDAY!!). I don't know how or why, probably just from life experience. If I did not, a quick email or phone call would have answered the question. OS/Hobbico/Whatever parent company does have good US customer service. If you read the instructions all the way through before even getting to the field, it does talk briefly about rich being equivalent to slower RPM's and exhaust smoke, and lean being associated with fast, high pitch RPM's with little to no exhaust smoke. I guess they just assume some kind of mechanical inclination, which really someone should have if operating one of these (potentially dangerous) engines alone.

Just my $.02, but like I said, I agree that more clarity in the OS46AX instruction manual would be greatly appreciated and go a long way.