Description
Overview:
This gasket is a Genuine Stihl OEM part for backpack leaf blowers, designed to create a reliable seal between mating engine or intake components. Made from durable, heat- and fuel‐resistant gasket material, it helps prevent air and fuel leaks that can affect performance. It is a direct replacement for worn or damaged seals on Stihl blowers such as the BR340 and BR340L, restoring correct sealing and stable running. The precise cut-out profile and correct thickness support proper alignment and clamping pressure, helping maintain vacuum, compression, and mixture consistency. OEM Part No. 4203 129 0900 ensures compatibility with specified machines and straightforward installation using standard hand tools.
Key Features:
- Genuine Stihl part for assured compatibility and quality
- OEM reference 4203 129 0900 for an exact fit on listed models
- Robust, fuel- and heat‐resistant material for long service life
- Helps prevent air, fuel, and oil mist leaks at critical joints
- Supports reliable starting, smooth idling, and consistent power
- Accurate profile and thickness for correct clamping and sealing
- Direct replacement; no modifications required on compatible units
- Suitable for routine maintenance or repairs after disassembly
Typical Applications:
Used when servicing the intake, carburettor interface, or engine cover joints on Stihl backpack blowers. Ideal during carburettor removal, manifold or airbox work, or when addressing vacuum leaks, erratic idle, or loss of power. Replace whenever the original gasket is damaged, compressed, or oil-soaked to maintain reliable operation.
Also known as:
Sealing gasket, manifold gasket, intake gasket, engine joint gasket, mounting gasket, spacer gasket, sealing washer (flat type), packing gasket, replacement seal for blower intake assemblies.
Fits Models:
BR320, BR320L, BR340, BR340L, BR380, BR400, BR420, BR420C, SR320, SR340, SR400, SR420
Alternate Part Numbers:
4203-129-0900, 42031290900
Product Specifications
| L&S Part No. | 4203 129 0900 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42031290900 |
| Unit of Sale | 1 |
| Applications | 400, BR320, BR320L, BR340, BR340L, BR380, BR400, BR420, BR420C, SR 320, SR 340, SR 420, SR320, SR340, SR400, SR420 |
| Machine Type | Backpack Blowers |
| Fits Brands | Stihl |
| Fits Models | BR320, BR400 | SR 320, 400 | SR 340, SR 420 |
