ORIGINAL: q8cub
[Also, the engine has just been broken in, and had only few flights (5-6 flights) with synthetic oil (redline 1:40 mix). And, there has not been any changes to the factory low/high needle settings.
Please, please, please set the needles for your airplane, prop and fuel combination and the area where you fly.
There is no such thing as "Factory set needles"! Those settings will allow you to start the engine and little more. They could be spot on or way off ..... you have no way of knowing until YOU set the needles yourself!
Many threads have been written on this subject along with the sticky info at the top of this Forum's first page.