Description
Overview:
This detent spring is a Genuine Stihl part designed for use in petrol brushcutters and grass trimmers, including the Stihl FS400 and FS450. Made from durable metal, it provides the correct tension for the detent mechanism, helping the strimmer head or related assembly to engage and hold position reliably. Replacing a tired or broken spring restores smooth operation and prevents inconsistent head behaviour. Built for long service life and dependable performance, it is a direct-fit component that supports routine maintenance on professional and domestic machines. With precise dimensions to match OEM specifications, this spring helps keep your Stihl equipment working as intended under regular cutting and clearing tasks.
Key Features:
- Genuine Stihl part for assured fit, function, and compatibility
- Durable metal construction designed to resist fatigue under repeated cycling
- Maintains correct detent tension for smooth, positive engagement of the strimmer head
- Direct replacement for worn or broken springs; no modifications required
- Helps restore reliable line feed or head positioning, reducing nuisance stoppages
- Suited to heavy-duty use on brushcutters and trimmers across multiple models
- Compact OEM form factor for easy handling and straightforward installation
- Supports preventive maintenance, helping extend the overall service life of the machine
- Stihl reference: 4128 182 4200 for easy identification
Typical Applications:
Used during servicing or repair of Stihl strimmers/brushcutters to replace a weakened or lost detent spring. Common when the head does not latch correctly, won't hold position, or shows erratic operation. Suitable for routine overhauls to keep cutting performance consistent in gardening, landscaping, grounds maintenance, and contracting work.
Also known as:
Detent spring, retaining spring, retainer spring, clip spring, latch spring, locating spring, spool detent spring, head detent spring, trimmer head spring.
Fits Models:
FS120, FS120R, FS200, FS200R, FS25-4, FS250, FS250R, FS254, FS300, FS350, FS360, FS360C, FS380, FS400, FS410C, FS420, FS420L, FS450, FS480, FS500, FS550, FS550L, FS65-4, FS654, FS75, FS80, FS80R, FS83, FS83T, FS85, FS85R, FS85RX, FS85T, HS87
Alternate Part Numbers:
4128-182-4200, 41281824200
Product Specifications
| L&S Part No. | 4128 182 4200 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41281824200 |
| Unit of Sale | 1 |
| Applications | FS120, FS120R, FS200, FS200R, FS25-4, FS250, FS250R, FS254, FS300, FS350, FS360, FS360C, FS380, FS400, FS410C, FS420, FS420L, FS450, FS480, FS500, FS550, FS550L, FS65-4, FS654, FS75, FS80, FS80R, FS83, FS83T, FS85, FS85R, FS85RX, FS85T, HS87 |
| Machine Type | Strimmers |
| Fits Brands | Stihl |
| Fits Models | FS25-4, FS65-4 | FS75, FS80, FS85 | FS83, FS83T | FS120, FS200, FS250 | FS300, FS350, FS380 | FS360C FS410C | FS400, FS450, FS480 | FS500, FS550, FS550L | FS360, FS420, FS420L (older models) | HS87 |
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