I recently bought the Stihl BR600. In the manual, it says not to run the engine at full rpm's until after you have filled up three times. Some of you may say, sure follow the manual. However, in my FS80R manual, it says the same thing. The tanks have a fairly noticeable difference in size. How long did you (owners) break yours in? I did this with my FS80 as the manual said. I just want to know about the BR600. If so, it's going to be awhile before I can see it's true power.