MowerPartsGroup Stihl FS250 Replacement Gearhead GearCase Fits Many Stihl Units FR & FS 4137 640 0100 Replaces Stihl: 4130 640 0100, 4130 641 0300, 4137 640 0100 Fits: Stihl FR130 T, FR220, FR350, FR450, FR460, FR480, FR85, FR85 T, FS100, FS100R, FS110, FS110R, FS110 RX, FS110 X, FS120, FS120 R, FS130, FS130 R, FS200, FS200 R, FS240, FS240 R, FS250, FS250 R, FS25-4, FS260 R, FS44, FS44 R, FS65-4, FS74, FS80, FS80 R, FS83, FS83 R, FS83 T, FS85, FS85 R, FS85 T, FS87, FS87 R, FS90, FS90 R, FS-KM and FT 100 Please ask if you are unsure these parts will work for your unit. Please see description for full description.