Description
Overview:
The Filter Base is a genuine Stihl component for the air intake system on compact petrol chainsaws, including the MS 181 and MS 181 C. Moulded from durable, fuel‐resistant polymer in a hard‐wearing black finish, it supports and locates the air filter while helping to seal the intake path against dust and debris. A sound filter base is essential for clean airflow, stable carburation, and reliable engine performance. Use this OEM part (OEM No. 1139 120 3400) to replace a cracked, warped, or contaminated base and restore correct fit of the filter and cover. It is designed specifically for Stihl housing geometry for a precise fit, helping keep your saw efficient and extending service life with routine maintenance.
Key Features:
- Genuine Stihl OEM part for assured compatibility and performance (OEM No. 1139 120 3400)
- Precise fit for the specified models without modification
- Robust moulded polymer resists vibration, fuel, oil, and heat
- Helps maintain an effective air seal to reduce dust ingress and engine wear
- Supports correct positioning and stability of the air filter and cover
- Contributes to smooth idling, throttle response, and overall reliability
- Straightforward to replace during routine servicing using existing fasteners
- Built to Stihl quality standards for durability in professional and DIY use
Typical Applications:
Used during servicing or repair when the air filter base is damaged, missing, or no longer sealing properly. Suitable for chainsaws working in forestry, landscaping, garden maintenance, and property management where fine dust and chips are common. Helps maintain filtration efficiency, engine health, and consistent cutting performance in everyday and seasonal use.
Also known as:
Air filter base plate, air filter housing base, intake filter base, filter support plate, chainsaw airbox base. These terms refer to the base component that the air filter sits on and seals against inside the saw's intake assembly.
Fits Models:
MS 181, MS 181 C, MS 211, MS 211 C
Alternate Part Numbers:
1139-120-3400, 11391203400
Product Specifications
| L&S Part No. | 1139 120 3400 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11391203400 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl OEM part ensures compatibility (OEM No. 1139 120 3400) - Fits Stihl MS 181, MS 181 C, MS 211, MS 211 C models - Durable polymer resists vibration, fuel, oil, and heat - Maintains air seal to reduce dust ingress and engine wear - Supports correct air filter and cover positioning for reliability |
| Fits Models | MS181, MS181C | MS211, MS211C |
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