If your needle adjustment is that many turns out you may need to check the inlet screen to be sure it is clear of debris and or film . The screen can look clean but may be restricted with a buildup restricts flow . Take the screen out and use spray carb or brake cleaner through it or replace it with a new one . Also check the metering lever height . If the lever height is too low it will cause a need to run the needles out more than usual .