This genuine Stihl helical spring provides the necessary tension for the trimmer head's internal components, ensuring proper line feed action. Part number 0000 997 2015 is for use on select Stihl string trimmers including the following models: FSA 65, FSA 85, FS 75, FS 80 and FS 85.
String Trimmers: FSA 65, FSA 85, FS 75, FS 80, FS 85