Description
Overview:
This Genuine Stihl valve spring (part no. 4180 025 1600 / 41800251600) is a high‐tensile spring steel component that controls valve closing in the cylinder head, helping to maintain correct valve timing, compression and smooth running. It replaces worn or fatigued springs to restore reliable starting, steady idle and consistent power output. Designed for Stihl handheld petrol equipment across brushcutters, trimmers, hedge trimmers, pole pruners, edgers, KombiEngines and earth augers, it is a direct-fit OE solution for many 4‐MIX engines including FT 100 and FS 87. The spring's durable construction and corrosion-resistant finish support long service life in demanding outdoor conditions. This is a Genuine Part from Stihl, ensuring correct spring rate and fit to protect engine performance.
Key Features:
- Genuine Stihl part for precise fit and correct spring rate
- High‐tensile, heat‐treated spring steel for durability and fatigue resistance
- Restores compression, starting performance and idle stability
- Helps reduce valve float and maintain accurate valve timing under load
- Direct replacement for OE 4180 025 1600; no modifications required
- Corrosion-resistant finish for long service life in outdoor use
- Suitable for a wide range of Stihl 4‐MIX engines used in professional and domestic tools
- Reliable choice for preventative maintenance and top‐end refreshes
Typical Applications:
Used during engine overhauls and servicing when a valve spring shows fatigue, set, or damage. Suitable for restoring performance on machines with hard starting, misfires, loss of power, or unstable idle. Common in routine top‐end rebuilds, cylinder head repairs, and preventative maintenance on Stihl brushcutters, trimmers, pole pruners, hedge trimmers, edgers, KombiEngines and earth augers.
Also known as:
Valve return spring, poppet‐valve spring, cylinder head valve spring, engine valve spring, 4‐MIX valve spring, Stihl FT/FS/HL/HT valve spring.
Fits Models:
BT 130, BT 130 Z, BT 131, FC 90, FC 95, FC 100, FC 110, FC 111, FC 91, FR 130 T, FR 131 T, FS 83, FS 83 T, FS 87, FS 87 R, FS 89, FS 89 R, FS 90, FS 90 R, FS 91, FS 91 R, FS 100, FS 100 R, FS 100 RX, FS 110, FS 110 R, FS 110 RX, FS 110 X, FS 111, FS 111 R, FS 111 RX, FS 120, FS 130, FS 130 R, FS 131, FS 131 R, FS 200, FS 250, FS 310, FS 311, FT 100, HL 90, HL 90 K, HL 95, HL 95 K, HL 100, HL 100 K, HT 73, HT 100, HT 101, HT 102, HT 103, HT 130, HT 131, HT 132, HT 133, HT 135, KM 90, KM 90 R, KM 91 R, KM 100, KM 100 R, KM 110 R, KM 111 R, KM 130, KM 130 R, KM 131, KM 131 R, SP 9, SP 90, SP 90 T
Alternate Part Numbers:
4180-025-1600, 41800251600
Product Specifications
| L&S Part No. | 4180 025 1600 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41800251600 |
| Unit of Sale | 1 |
| Applications | 96, BT 130, BT 130 Z, BT 131, BT130, BT130Z, BT131, FC 100, FC 110, FC 111, FC 90, FC 91, FC 95, FC100, FC110, FC111, FC90, FC91, FC95, FR 130 T, FR130T, FR131T, FS 100, FS 100 R, FS 100 RX, FS 110, FS 110 R, FS 110 RX, FS 110 X, FS 111, FS 111 R, FS 111 RX, FS 120, FS 130, FS 130 R, FS 131, FS 131 R, FS 200, FS 250, FS 310, FS 311, FS 83, FS 83 T, FS 87, FS 87 R, FS 89, FS 89 R, FS 90, FS 90 R, FS 91, FS 91 R, FS100, FS100R, FS100RX, FS110, FS110R, FS110RX, FS110X, FS111, FS111R, FS111RX, FS120, FS130, FS130R, FS131, FS131R, FS200, FS250, FS310, FS311, FS83, FS83T, FS87, FS87R, FS89, FS89R, FS90, FS90R, FS91, FS91R, FT 100, FT100, HL 100, HL 100 K, HL 90, HL 90 K, HL 95, HL 95 K, HL100, HL100K, HL90, HL90K, HL95, HL95K, HT 100, HT 101, HT 102, HT 103, HT 130, HT 131, HT 132, HT 133, HT 135, HT 73, HT100, HT101, HT102, HT103, HT130, HT131, HT132, HT133, HT135, HT73, KM 100, KM 100 R, KM 110 R, KM 111 R, KM 130, KM 130 R, KM 131, KM 131 R, KM 90, KM 90 R, KM 91 R, KM100, KM100R, KM110R, KM111R, KM130, KM130R, KM131, KM131R, KM90, KM90R, KM91R, SP 9, SP 90, SP 90 T, SP9, SP90, SP90T |
| Machine Type | Brushcutters, Pole Pruners, Kombi Tools |
| Fits Brands | Stihl |
| Fits Models | FS83, FS83T | FS90, FS90R | FS100, FS110 | FS120, FS200, FS250 | FS130, FS130R | FS310 | FS91, FS91R | FS111, FS111R, FS111RX | FS131, FS131R | FS311 | FR130T | FR131T | FS89, FS89R | HT73 | HT101 | HT102, HT103 | HT130 | HT131 | HT132, HT133 | KM90, KM90R | KM91R | KM100, KM100R, KM110R | KM111R Engines | KM130, KM130R | KM131, KM131R | FC 90, 95 | FC 100 | FC 111 | BT 130 | BT 131 | BT 130 Z | FC 91, 96 | HL90K, HL90, HL95K | HL100, HL100K | HL 95, HL 95 K | HT135 | HT134 |
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