Go To Replacement Trimmer Gear Head For Stihl String Trimmers Fits Most FS Series From FS25 To FS250 Includes Gears Thrust Washer Rider Plate And Collar Nut

Replacement Trimmer Gearhead for Stihl FS Series single unit
✔️ Rebuilds trimmer gearbox with gears, thrust washer and collar nut

This replacement gearbox head assembly fits many Stihl FS-series trimmers and replaces OEM parts, restoring drive and performance. It’s designed for backpack brushcutters, clearing saws, and Kombi tools that use Stihl-style gear heads.

✅ Replaces OEM parts 4137 640 0100, 4130 640 0100, 4130 641 0300
✅ Fits Stihl FS models: FS25-4, FS65-4, FS36, FS40, FS44, FS55, FS55R, FS56, FS72, FS74, FS75, FS76, FS80, FS83, FS85, FS87, FS90, FS94, FS100, FS110, FS120, FS130, FS200, FS240, FS250, FS260, FS460, FR85, FR130T, FR220, FR350, FR450, FR480
✅ Includes gears, thrust washer, rider plate, and collar nut
✅ Suitable for backpack brushcutters, brushcutters, clearing saws, Kombi tools, and pole saws

💡 What is a trimmer gearbox head used for and why replace it?

Replacing a worn gear head helps keep your trimmer productive. - Handy for restoring drive and line feed on Stihl FS-series trimmers - Simple swap that saves time and money over full engine service - Widely compatible with many FS models and related tools ✝️