I believe that BME will respond something like this. There is no such thing as a factory setting. A good engine tuning STARTING point is with both needles set between 1-1/2 and 2 turns open, preferably at 1-1/2. That is a point where most, if not all, engines will start and the tuning process for each location, altitude, prop size and type, and fuel mix can begin.

Again, there is no such thing as a factory needle setting. Glow engines don't have them and nobody ever asks glow engine manufacturers for "factory settings" What on God's Green Earth leads anyone to believe that gassers have them?