Description
Overview:
The Oil Seal 17x32.9x5 for Stihl MS780 and MS880 is a genuine Stihl part designed to keep engine oil where it should be and stop contaminants entering critical areas. Made from a durable, oil‐resistant elastomer engineered for power tool environments, it provides a tight, reliable seal under heat, vibration, and continuous use. Its precise 17 mm inner diameter, 32.9 mm outer diameter, and 5 mm width ensure a proper interference fit in compatible housings. Used in professional and heavy‐duty chainsaws, it helps maintain crankcase integrity and lubrication, supporting stable performance and longer component life. Supplied as OEM Part No. 9640 003 1855, this seal is suitable for routine servicing or rebuilds on high‐performance saws such as the Stihl MS780 and MS880.
Key Features:
- Genuine Stihl OEM part for assured compatibility and build quality (Part No. 9640 003 1855)
- Dimensions: 17 mm (ID) x 32.9 mm (OD) x 5 mm (width) for an accurate, secure fit
- Helps prevent oil leaks and keeps debris out, protecting internal components
- Designed to withstand engine heat, vibration, and oil exposure for dependable service life
- Supports consistent engine efficiency and reduces the risk of premature bearing wear
- Smooth, straightforward fitting with standard workshop practices to minimise downtime
- Stable sealing performance helps maintain correct lubrication and operating conditions
- Suitable replacement on listed Stihl professional chainsaw models
Typical Applications:
Used during routine maintenance or engine overhauls on compatible Stihl chainsaws to restore sealing performance. Common when addressing oil leaks, bearing services, crankcase reseals, or after high‐hour use. Suitable for professional forestry, arborist work, and heavy cutting where reliable sealing is essential for consistent saw performance.
Also known as:
Shaft seal, crank seal, radial shaft seal, oil lip seal, engine oil seal, sealing ring. These terms are often used interchangeably for components performing the same sealing function in small engines and power tools.
Fits Models:
088, MS 780, MS 880, MS 881
Alternate Part Numbers:
9640-003-1855, 96400031855
