Yea......
I have an Evo 50 with O.S. 50 SX-H. I've never under any conditions been able to use any more than 1 turn open on the main needle. Most of the time it's about 3/4 turns open. I questioned this myself since I've been running model engines for almost 40 years and I've never had one that needed a setting like this but that's the way this engine is. What ambient temperature do you fly at? The warmer it is outside the leaner the engine has to be set. Mine is typically about 3/4 turn on a cooler day (60-70 degrees) and 1 1/4 turns when it's hot and humid.
this is what l'm looking for....
l usually fly in an embient temp around 23~25 degrees; l'm flying at about 3/4 turn too with 10% nitro. and it is very sensitive at that point, only a few clicks will change a lot.
So....now l feel better with my engine because at least someone is having very simular question to me
l think the reason why the needle needed to be so small is the shape of the needle........ becasue this engine's needle is a bit different with the others.
this needle doesn't have a sharp end, so this may caused the problem. Or maybe l'shouldn't call this as a problem because this might be the characteristic of this engine.
thanks guys