Description
Overview:
The Oil Seal 12x20x5 is a Genuine Stihl part designed to stop oil leakage and keep your chainsaw running efficiently. Sized 12 x 20 x 5 mm (0.47 x 0.79 x 0.20 inches), it fits key sealing locations and helps maintain correct pressure and lubrication. Built from durable, oil- and fuel-resistant elastomer, it provides a secure seal under engine vibration and heat. It is engineered for Stihl top-handled chainsaws, including the MS200T and 020T, and is identified by Manufacturer Part Number (MPN) 9640 003 1191 for accurate replacement. Suitable for routine servicing or repairs, this seal helps reduce wear, prevent mess, and support reliable starting and smooth running in professional and domestic use.
Key Features:
- Genuine Stihl replacement part for assured compatibility and performance
- Dimensions: 12 x 20 x 5 mm (0.47 x 0.79 x 0.20 inches) for the correct sealing fit
- MPN: 9640 003 1191 for precise identification
- Robust elastomer construction resists oil, fuel, heat, and vibration
- Helps prevent oil leaks, protecting engine components and maintaining efficiency
- Supports smooth running and consistent performance under load
- Easy to fit with basic workshop tools, reducing downtime
- Suitable for professional arborists and DIY users maintaining Stihl saws
- Reliable sealing to reduce maintenance intervals and unexpected failures
Typical Applications:
Used during engine or crankcase servicing on Stihl chainsaws to cure oil leaks, restore performance after wear, and as part of preventative maintenance or rebuilds. Ideal when replacing bearings, refurbishing the crankcase, or addressing leakage that affects idle quality and lubrication.
Also known as:
Crankshaft oil seal, crankcase seal, radial lip seal, rotary oil seal, seal ring, oil sump seal, rotary lip seal.
Fits Models:
020
020 T
020T
MS 200
MS 200 T
MS200
MS200T
Alternate Part Numbers:
9640-003-1191, 96400031191
Product Specifications
| L&S Part No. | 9640 003 1191 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 96400031191 |
| Unit of Sale | 1 |
| Applications | 020, 020 T, 020T, MS 200, MS 200 T, MS200, MS200T |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS200, MS200T | 020, 020T | MC 200 |
