Description
Overview:
The Oil Seal 15x25x5 for Stihl MS231 and MS231 C is a Genuine Stihl Part designed to control oil flow around rotating shafts and keep contaminants out. Built from a durable, oil‐resistant elastomer with a spring‐reinforced lip and metal support ring, it provides a tight, consistent seal under engine vibration and heat. It is used in small petrol engines on chainsaws and backpack blowers, helping to protect bearings and maintain correct lubrication. This seal is sized 15x25x5 mm (0.59x0.98x0.20 inches) for an accurate fit in the specified housings. Ideal for Stihl MS231 and MS231 C models, it is also fitted to various other Stihl saws and blowers listed below, offering a straightforward replacement for worn or leaking seals.
Key Features:
- Genuine Stihl part for reliable fit and performance across listed machines
- Exact dimensions: 15x25x5 mm (0.59x0.98x0.20 inches) for correct seating in the housing
- Oil‐ and fuel‐resistant elastomer with spring‐reinforced lip for consistent sealing pressure
- Helps prevent oil leaks, protects crankshaft bearings, and supports smooth running
- Stable sealing under vibration and temperature typical of chainsaw and blower use
- Compact profile for easy installation with standard workshop tools and techniques
- Assists in restoring engine efficiency after seal wear or hardening
- OEM reference: 9639 951 1584 for clear identification and parts matching
Typical Applications:
Used during routine servicing or engine rebuilds when oil seepage is present or seals show wear. Suitable for sealing around rotating shafts in Stihl chainsaws and backpack blowers, helping to maintain lubrication inside the engine while keeping dust and debris out. Commonly replaced when addressing oil leaks, bearing protection, or preventative maintenance on hard‐worked tools.
Also known as:
Oil lip seal, crankshaft seal, shaft seal, radial oil seal, rotary seal ring, seal ring, rubber oil seal, oil gasket.
Fits Models:
BR 350, BR 430, BR 450, BR 450 C, MS 181, MS 181 C, MS 211, MS 211 C, MS 231, MS 231 C, MS 251, MS 251 C, MS 271, MS 271 C, MS 291, MS 291 C
Alternate Part Numbers:
9639 951 1584, 96399511584
Product Specifications
| L&S Part No. | 9639 951 1584 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 96399511584 |
| Unit of Sale | 1 |
| Applications | BR 350, BR 430, BR 450, BR 450 C, BR350, BR430, BR450, BR450C, MS 181, MS 181 C, MS 211, MS 211 C, MS 231, MS 231 C, MS 251, MS 251 C, MS 271, MS 271 C, MS 291, MS 291 C, MS181, MS181C, MS211, MS211C, MS231, MS231C, MS251, MS251C, MS271, MS271C, MS291, MS291C |
| Machine Type | Backpack Blowers, Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS181, MS181C | MS211, MS211C | BR350, BR430, BR450 | MS231, MS251 | MS271, MS271C, MS291, MS291C | BR430 | BR450, BR450C |
