Description
Overview:
This Genuine Stihl manifold (part code 1143 140 2501) is the intake connection used on selected mid-size Stihl chainsaws, including the MS 231 and MS 251. It sits between the cylinder and carburettor to create an airtight, fuel‐resistant passage for the air‐fuel mixture, helping the engine start reliably and run smoothly across the rev range. Built from durable, heat‐ and fuel‐resistant elastomer, it resists cracking and hardening from petrol and vibration. As an OEM component it matches the original dimensions and mounting points, so it restores the correct seal and alignment without modifications. Ideal for replacing worn or split manifolds that cause air leaks, erratic idle, or poor acceleration on Stihl MS 231/MS 251 family saws.
Key Features:
- Genuine Stihl OEM part for exact fit and compatibility
- Fuel‐ and heat‐resistant elastomer construction for long service life
- Maintains an airtight seal to prevent lean running and overheating
- Precise moulding keeps carburettor alignment correct for smooth throttle response
- Direct replacement using existing fixings; no alterations required
- Helps restore stable idle, clean acceleration, and consistent cutting performance
- Designed to withstand vibration and repeated thermal cycling in daily use
- Suitable for professional users and DIY maintenance
Typical Applications:
Used during routine servicing or repairs when diagnosing hard starting, surging, or erratic idle caused by air leaks. Commonly fitted when the original intake boot shows cracks, stiffness, or poor sealing. Suitable for workshop overhauls, preventative maintenance before peak cutting seasons, and field repairs to keep MS 231/MS 251 series chainsaws cutting safely and efficiently.
Also known as:
Inlet boot, carburettor stub, carb mounting boot, intake connector hose, air‐fuel inlet sleeve, carb adaptor, manifold boot, carburettor intake sleeve.
Fits Models:
MS 231, MS 231 C, MS 251, MS 251 C, MS231, MS231C, MS251, MS251C
Alternate Part Numbers:
1143-140-2501, 11431402501
Product Specifications
| L&S Part No. | 1143 140 2501 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11431402501 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl OEM part ensures exact fit and compatibility - Fuel‐ and heat‐resistant elastomer for long service life - Maintains airtight seal to prevent lean running - Direct replacement using existing fixings; no alterations required - Fits Stihl MS 231 and MS 251 chainsaw models |
| Fits Models | MS231, MS251 |
