Description
Overview:
This genuine Stihl carburettor (Manufacturer Part Number 1143 120 0631) is a direct replacement for MS 231 and MS 251 chainsaws. Built with a robust metal alloy body and precision metering components, it regulates the air and fuel mixture to keep your two-stroke engine starting easily, idling steadily and delivering strong power under load. The diaphragm-type design suits chainsaw use where the machine is operated at varying angles. Engineered for durability in demanding outdoor conditions, it resists vibration and fuel exposure. Supplied as a like-for-like unit, it connects to the existing manifold, throttle linkage and fuel lines on compatible saws without modification. Use it to restore lost performance or as part of planned maintenance on MS 231-series machines.
Key Features:
- Genuine Stihl OEM carburettor; Manufacturer Part Number 1143 120 0631 for assured fit and function.
- Direct-fit replacement that preserves original performance on the specified models.
- Accurate metering for easy starting, stable idle and crisp throttle response.
- Durable metal alloy construction with quality diaphragms and seals for long service life.
- Diaphragm design operates reliably in any saw position (felling, snedding, limbing).
- Straightforward installation using existing mounting points, linkages and fuel lines.
- Helps correct symptoms of a worn unit such as poor pick-up, stalling or surging.
- Serviceable and tuneable to manufacturer guidance for ongoing maintenance.
Typical Applications:
Replacing a worn, clogged or corroded carburettor on Stihl MS 231 or MS 251 chainsaws to restore dependable running. Suitable for professional forestry, landscaping, grounds maintenance and domestic firewood cutting. Used during overhauls when hard starting, unstable idle, fuel flooding or lack of power indicates carburettor wear or contamination.
Also known as:
Carb, carburettor assembly, carb body, fuel mixer, air-fuel mixer, metering unit, mixing chamber, engine carb, replacement carb, OEM carburettor for Stihl chainsaw.
Fits Models:
MS 231, MS 231 C, MS 251, MS 251 C, MS231, MS231C, MS251, MS251C
Product Specifications
| L&S Part No. | 1143 120 0631 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11431200631 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl OEM carburettor for MS 231 and MS 251 chainsaws - Direct-fit replacement using existing mounting points and linkages - Durable metal alloy construction for long service life - Diaphragm design operates reliably at varying angles - Accurate metering ensures easy starting and stable idle |
| Fits Models | MS231, MS251 |
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