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  1. B

    Stupid problem with FS 91

    Thanks to all replies. I was able to source .25"x .25"x 12" steel keystock from local Ace Hardware. Removed the line trimmer head from the shaft. Inserted the keystock into the female coupling of the trimmer head, clamped a large vice grip onto the keystock, held firmly and twisted the line...
  2. B

    Stupid problem with FS 91

    Hello experts. After using my FS 91 for 3 years and being thoroughly satisfied, I made a stupid mistake made in haste. After using a metal brush cutting blade, I changed over to the line trimming head. Later, wanting to reinstall the metal blade, I inserted the anti-rotation pin, hand rotated...
  3. B

    Welcome to the Stihl Forum -- Check in Here First!

    Hello Stihl users and experts. I currently use the models MS250, MS311 and FS91. I am homesteading in Eastern Tennessee.
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