Description
Overview:
This Genuine Stihl muffler gasket is a direct-fit seal for the joint between the cylinder and silencer on selected Stihl petrol chainsaws, including MS231 and MS251. Manufactured from heat-resistant composite gasket material, it is designed to withstand high exhaust temperatures and vibration while maintaining a gas-tight seal. By preventing exhaust leaks at the muffler interface, it helps preserve engine efficiency, stable idle, and correct back pressure. It is the correct replacement for OEM No. 1143 149 0603 and is suitable for routine servicing or repair after removing the muffler. Built for reliability in professional and domestic use, it helps protect nearby components from hot gas blow-by and supports clean, consistent running in demanding cutting conditions.
Key Features:
- Genuine Stihl part for assured fit and compatibility (OEM No. 1143 149 0603)
- Heat- and vibration-resistant composite material for durable sealing under exhaust temperatures
- Helps prevent exhaust leaks, preserving power, throttle response, and carburetion stability
- Reduces risk of hot gas blow-by that can mark plastics or nearby components
- Precisely cut profile for the MS231/MS251 engine-muffler interface
- Supports correct back pressure for smoother running and reduced noise leakage
- Ideal to replace whenever the muffler is removed during service
- Simple, quick installation with standard hand tools to minimise downtime
- Reliable in forestry, arborist, landscaping, and property maintenance environments
- Genuine status provides consistent quality compared with non-genuine alternatives
Typical Applications:
Used when refitting or replacing the muffler to restore a tight exhaust seal on Stihl chainsaws. Suitable for fixing symptoms such as visible leakage at the muffler joint, sooting, unusual exhaust noise, or mild loss of power. Commonly replaced during routine servicing in workshops, on-site maintenance for contractors, and by DIY users after cleaning or overhauling the exhaust system.
Also known as:
Exhaust gasket, silencer gasket, muffler-to-cylinder gasket, exhaust port gasket, chainsaw exhaust seal, Stihl silencer seal.
Fits Models:
MS231, MS231C-BE, MS251, MS251C-BE
Alternate Part Numbers:
1143-149-0603, 11431490603
Product Specifications
| L&S Part No. | 1143 149 0603 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11431490603 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl part, OEM No. 1143 149 0603 - Fits Stihl chainsaws MS231, MS251 - Heat-resistant composite material for high exhaust temperatures - Prevents exhaust leaks, maintaining engine efficiency - Simple installation with standard hand tools |
| Fits Models | MS231, MS251 |
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