I might be doing something wrong here but I just got a new Stihl FS90 trimmer and I noticed that after running this trimmer for about 8 minutes it seemed to loose power and then stall. I was able to start it again and after about the same amount of time it lost power and stalled again. I called the dealer and he mentioned/asked if I was running the trimmer on it side with the carb down? Well I was doing some edging with the trimmer at the time this happened. Is it possible that the trimmer will flood after extended time on its side with the carb facing the ground? Should I be turning it over and walking the other way with carb up? I hope this makes sense, bit of a noob to these trimmers. By the way I am running Stihl Ultra 50:1 with Shell V Power if that makes a difference.