Description
Overview:
This Genuine Stihl muffler (part number 1143 140 0651) is the correct exhaust unit for Stihl MS 231 and MS 251 series chainsaws. Built from pressed steel with a heat-resistant finish, it reduces exhaust noise and helps control emissions while maintaining the correct back pressure for smooth engine running. The muffler is essential for keeping performance stable, protecting the engine from overheating, and improving user comfort by cutting noise levels. It is a direct replacement for the original factory part, with mounting points aligned to the saw body so it accepts the existing fasteners and gasket arrangement. Designed for everyday use in demanding conditions, it withstands vibration, heat cycles, and exposure to oil, fuel, and resin common in pruning, felling, and firewood work.
Key Features:
- Genuine Stihl part for correct fit and reliable performance
- Robust steel construction with heat-resistant coating for durability
- Optimised to reduce noise and support compliant exhaust emissions
- Direct replacement; aligns with original mounting points
- Helps maintain engine power and throttle response by keeping back pressure stable
- Resistant to vibration, heat, and contamination from oil and resin
- Compatible with MS 231 and MS 251 families, including C variants
- Designed for long service life with routine inspection and correct gasket use
- Supports user comfort during extended cutting sessions
- Suitable for professional, farm, and domestic chainsaw applications
Typical Applications:
Used to replace a worn, damaged, or clogged exhaust on Stihl MS 231/MS 251 chainsaws. Ideal when the saw is louder than normal, down on power, or showing poor throttle response. Suitable for routine maintenance in forestry, landscaping, arborist work, estate management, and firewood processing.
Also known as:
Silencer, exhaust, exhaust muffler, exhaust box, exhaust can, exhaust chamber, noise suppressor.
Fits Models:
MS 231, MS 231 C, MS 251, MS 251 C, MS231, MS231C, MS251, MS251C
Product Specifications
| L&S Part No. | 1143 140 0651 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11431400651 |
| Unit of Sale | 1 |
| Applications | MS 231, MS 231 C, MS 251, MS 251 C, MS231, MS231C, MS251, MS251C |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS231, MS251 |
