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Replacement parts for Stihl string trimmers (weed eaters) and brushcutters, most of them under our own Proline® brand and listed with the Stihl part number each one replaces. Shop by model: FS38 · FS45 · FS46 · FS55 · FS80 · FS90 · FS100 · FS111 · FS120 · FS200 · FS250. Need a manual? See our free Stihl trimmer manuals.
Common Stihl trimmer fixes
| Symptom | Check first |
|---|---|
| Won't start or won't stay running | Fuel filter, fuel line and primer bulb, then the carburetor. For the FS38, FS45, FS46, FS55 and FS55R: Proline® carburetor (replaces Stihl 4140 120 0619) |
| Line won't feed, or the spool is cracked | AutoCut 25-2 head parts: spool (replaces Stihl 4002 713 3017) and eyelets (replaces Stihl 4003 713 8301) |
| Bogs under load, or a sooted spark plug | Air filter first. For the FS38, FS45, FS46 and FS55: Proline® air filter (replaces Stihl 4140 124 2800). Then a carburetor rebuild kit. |
Is a weed eater the same as a string trimmer?
Yes. “Weed eater” is a brand name that people use for any string trimmer. Stihl’s gas string trimmers and brushcutters are the FS series, and the model number (FS55, FS90 and so on) is on the label on the machine.