Description
Overview:
This genuine Stihl pre-separator (1140 140 7801) is a moulded polymer insert for the intake system on selected Stihl petrol chainsaws, including the MS311 and MS391. It improves the pre-separation of dust and chips before the air reaches the main filter, helping to keep the filter cleaner for longer and protecting the engine from abrasive debris. By reducing dust loading, it supports consistent airflow, easier starting, and steady power output in dusty conditions. Built from hard-wearing, impact-resistant plastic to handle heat, vibration, and routine maintenance, it is a dependable OEM component for regular use. Ideal for users who cut in timber yards, forestry, landscaping, and farm settings, it is a straightforward replacement that helps maintain chainsaw performance and service life.
Key Features:
- Genuine Stihl OEM part for assured fit, function, and reliability
- Durable, fuel- and heat-resistant polymer construction for long service life
- Enhances pre-separation efficiency to reduce dust reaching the main air filter
- Helps maintain stable running, power delivery, and cleaner combustion
- Cuts filter maintenance frequency and wear on intake components
- Direct replacement using existing fittings for quick, simple installation
- Designed for demanding, dusty environments and regular professional use
- Supports longer service intervals and protects the engine and filter system
- Compatible with selected Stihl chainsaws in the MS3xx range
Typical Applications:
Useful wherever chainsaws work in dusty conditions: forestry thinning and felling, arborist ground work, landscaping and estate maintenance, farm and smallholding tasks, and firewood processing. It helps the saw cope better with fine sawdust and chips, keeping the air filter cleaner so the engine can breathe properly over longer cutting sessions.
Also known as:
Air pre-cleaner, intake dust separator, pre-cleaner duct, pre-separation insert, air intake pre-cleaner, pre-filter separator.
Fits Models:
MS311, MS362, MS362C, MS391, MS400C
Alternate Part Numbers:
1140 140 7800, 11401407800, 11401407801
Product Specifications
| L&S Part No. | 1140 140 7801 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11401407801 |
| Unit of Sale | 1 |
| Applications | MS311, MS362, MS362C, MS391, MS400C |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS362, MS362C | MS311 | MS391 | MS400C |
