Description
Overview:
This Oil Seal (flywheel side) is a non-genuine replacement for selected Stihl cut-off saw engines, equivalent to OEM part number 9640 003 1745. It sits on the flywheel side of the crankshaft to stop oil/fuel mix escaping and to maintain crankcase pressure, which is essential for smooth starting and consistent power. Made from a durable, oil- and fuel-resistant elastomer with a spring-supported sealing lip, it is built to cope with heat and vibration in demanding site use. The seal measures 17 x 28 x 7 mm (0.67 x 1.10 x 0.28 inches) and is intended for Stihl disc cutters such as the TS 400 and TS 700. It is a practical, cost-effective choice for routine servicing and repairs.
Key Features:
- Non-genuine part offering a cost-effective alternative to OEM 9640 003 1745
- Size: 17 x 28 x 7 mm (0.67 x 1.10 x 0.28 inches) for correct fit
- Flywheel-side crankshaft seal to prevent oil leaks and air ingress
- Helps maintain crankcase compression for reliable starting and steady running
- Durable elastomer construction with spring-supported lip for consistent sealing
- Resists petrol, oil and engine temperatures typical of disc cutter use
- Moulded outer surface for a secure interference fit in the housing
- Fine sealing edge for reduced friction and wear on the shaft
- Supports bearing protection by keeping contaminants out
- Straightforward like-for-like replacement during routine engine service
Typical Applications:
Ideal for engine rebuilds, crankshaft or bearing changes, and air-leak fixes on Stihl disc cutters used in construction, demolition, groundwork, landscaping and hire fleets. Fit this seal on the flywheel side when symptoms include poor idle, hard starting, or oil residue around the flywheel area. Suitable for both professional maintenance and DIY repairs.
Also known as:
Crankshaft oil seal (flywheel side), radial shaft seal, rotary lip seal, seal ring, shaft seal, gasket.
Fits Models:
TS 400, TS 460, TS 700, TS 800
Alternate Part Numbers:
9640 003 1745, 96400031745
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