Hello,
I've purchased LT-40 ARF & installed Evolution trainer power system engine. I few with the help of instructor for about 3 times & instructor told me that it is running little rich & needs new spark plug.
Since then I replaced plug & it still did not run to his liking.

He told me to remove limiters so that he can adjust it further. Now I have completely changed factory set positions. Is it possible to go back to factory settings? Personally, I liked the way it was running factory set.

My probelm is that I hve been spending lot of time adjusting this engine then actually flying.

Anybody had a simillar issues with this engine?

If this does not work then I may have to buy new engine so that I can start flying & save Evolution for the next plane.

Which good reliable engine you would recommend in .40 to .46 size that is easier to set up & run for beginner.

Thanks for your help