Description
Overview:
This genuine Stihl decompression valve (part no. 4238 020 9400) is an OEM replacement for petrol cut-off saws, helping the engine start more easily and reliably. It fits directly into the cylinder on Stihl two-stroke machines such as the TS 410 and TS 420, and lowers cylinder pressure during starting to reduce pull effort. The valve features a robust metal body with a heat- and fuel-resistant sealing O-ring for a gas-tight fit under demanding site conditions. By easing starting loads, it helps reduce wear on the recoil starter and engine components, supporting consistent performance across frequent stop-start use. Built for long service life, it integrates seamlessly with compatible Stihl models without modification.
Key Features:
- Genuine Stihl OEM part for assured fit and performance (4238 020 9400)
- Reduces engine compression during starting to cut pull effort
- Helps extend the service life of the starter rope, pawls, and recoil unit
- Durable metal construction with quality sealing O-ring for reliable seating
- Heat, vibration, fuel, and oil resistant for tough site environments
- Simple screw-in replacement; typically a quick, straightforward fit
- Designed for Stihl TS 410, TS 420, and TS 440 cut-off saws
- Direct interchange with Stihl references 4238-020-9400 and 42380209400
Typical Applications:
Used on Stihl cut-off saws in construction, utilities, roadworks, landscaping, and hire fleets where frequent restarts are common. Ideal for tasks such as cutting concrete, masonry, asphalt, and metal, where easier cold or hot starts improve productivity and reduce operator strain.
Also known as:
Decompressor, decomp valve, compression release valve, pressure relief valve, starting aid valve, engine start assist valve.
Fits Models:
TS 410, TS 420, TS 440
Alternate Part Numbers:
4238-020-9400, 42380209400
Product Specifications
| L&S Part No. | 4238 020 9400 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42380209400 |
| Unit of Sale | 1 |
| Applications | TS 410, TS 420, TS 440, TS410, TS420, TS440 |
| Machine Type | Disc Cutters |
| Fits Brands | Stihl |
| Fits Models | TS410, TS420 | TS440 |
