Description
Overview:
This genuine Stihl oil seal (17 x 39.9 x 5 mm) is an OEM sealing component for Stihl petrol chainsaws, including the 038 and MS380. Made from a durable, oil-resistant elastomer with a precision sealing lip, it keeps lubrication where it should be and helps maintain airtight crankcase integrity. Correct sealing prevents oil loss, reduces contamination, and supports consistent engine performance. The exact dimensions ensure a proper interference fit in the housing and a secure seal on the rotating shaft. Use it when replacing worn seals during servicing or rebuilds to restore reliability. Supplied as Stihl part number 9640 003 1880, it fits selected mid-range professional saws and is suitable for regular use in forestry, landscaping, and construction environments.
Key Features:
- Genuine Stihl OEM part for assured compatibility (Genuine Part)
- MPN 9640 003 1880; replaces 9640-003-1880 and 96400031880
- Size 17 mm x 39.9 mm x 5 mm for an exact fit
- Oil-resistant elastomer construction for durability in fuel and oil environments
- Reliable sealing to help prevent oil leaks and air ingress
- Supports stable running and correct engine lubrication
- Accurate fitment for straightforward installation during servicing
- Suitable for Stihl 038, MS380, and MS381 series chainsaws
Typical Applications:
Used to replace worn or leaking engine seals on Stihl chainsaws during routine servicing, repairs, or full rebuilds. Suitable for machines used in forestry, arboriculture, landscaping, and site maintenance where dependable sealing is essential for performance, emissions, and starting reliability.
Also known as:
Crankshaft seal, shaft seal, lip seal, seal ring, rotary shaft seal.
Fits Models:
038, MS 380, MS 381, MS380, MS381
Alternate Part Numbers:
9640-003-1880, 96400031880
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