I was going to post this in Roger's thread about his stihl fs85 having a clutch problem and resolved it by putting in new springs, but I decided to start a new thread about my stihl fs85 having the clutch slipping and making a squeaky different sound from the usual bell tingling sound. "I know this is an old thread but one of my fs85s is having a problem with the clutch and sounds like the spring prob you were having. But mine when warm will have the head spinning in idle sometimes. And it makes a squeaky metal sound without the tinging stihl clutch sound. When I hear the normal stihl tinging bell sound the head doesn't spin in idle. It seems like the clutch is messed up with these symtoms right? The trimmer is only a year old and is run without the guard and my dad was running it most of the time with extra string and not giving it full throttle giving it a bell sounding rough sound. Then after he was running it it started making the metal squeaky sound and having the head spin when at idle or when turned upside down for edging. Is this the spring problem or something else with my trimmer? It is at the shop again for repair for the problem. The first time I brought it in they took two weeks to look at it and then said it was fine and didn't fix anything. This time I want this legitimate problem fixed. It has to be warmed before it acts weird. Any ideas of the slipping clutch?"