Description
Overview:
This Oil Seal 13.5x20x4 is a genuine Stihl part designed to keep engine oil where it should be and protect internal components from contamination. Made from oil-resistant elastomer with a spring-loaded lip, it provides a secure, long-lasting seal on small rotating shafts. It is intended for use in Stihl chainsaws, including the 064 and MS640, where tight sealing around the crankshaft is critical for smooth running and correct lubrication. With dimensions of 13.5 mm (inner diameter) x 20 mm (outer diameter) x 4 mm (width), it fits precisely in the specified housings and helps maintain compression, reduce leaks, and support reliable performance in demanding cutting environments. Genuine Stihl quality ensures consistent fit and durability.
Key Features:
- Genuine Stihl part for correct fit and reliable sealing performance
- Dimensions: 13.5 mm ID x 20 mm OD x 4 mm width for precise installation
- Oil-resistant rubber construction with spring-loaded sealing lip for secure contact
- Helps prevent oil and fuel mix leakage from the crankcase or shaft areas
- Supports smooth running and reduces the risk of contamination ingress
- Durable build suited to high-vibration, high-speed chainsaw use
- Compact form factor for easy placement in tight engine cavities
- Suitable for preventative maintenance and like-for-like replacement
Typical Applications:
Used on chainsaw crankshafts and similar rotating shafts to retain oil and exclude dirt, dust, and moisture. Common in engine side covers, clutch or flywheel sides, and other sealing points where a 13.5 mm shaft passes through a housing. Ideal for routine servicing, rebuilds, and leak fixes to restore performance and reliability.
Also known as:
Shaft seal, rotary shaft seal, crankshaft seal, lip seal, radial oil seal, engine oil seal, sealing ring, elastomer seal.
Fits Models:
046, 064, 066, GS461, MS460, MS461, MS640
Alternate Part Numbers:
9640-003-1355, 96400031355
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