Description
Overview:
This Genuine Stihl oil seal is a rotary shaft seal sized 15 x 24 x 7 mm (inner diameter x outer diameter x width). Made from oil‐resistant elastomer with a rigid metal reinforcement, it keeps lubricants in and dirt out, supporting smooth, reliable running. Effective sealing is vital on two‐stroke engines to maintain crankcase integrity, performance, and service life. The seal is used across a range of Stihl machines, including cut-off/disc cutters such as the TS400 and TS420. A precise fit helps prevent oil weep and air leaks that can lead to poor starting, erratic idle, or premature wear. Suitable as a like‐for‐like replacement during routine servicing or full engine rebuilds, and whenever a hardened, damaged, or leaking seal is identified.
Key Features:
- Genuine Stihl part for assured fit, material quality, and compatibility
- Dimensions: 15 mm ID x 24 mm OD x 7 mm width for accurate seating
- Prevents oil leakage and blocks dust and debris ingress at the shaft
- Helps maintain correct crankcase sealing and stable engine tuning
- Durable, oil‐resistant rubber with metal reinforcement for stability
- Suitable for high‐speed rotating shafts common to 2‐stroke tools
- Straightforward press‐fit replacement; install like‐for‐like
- Replaces Stihl 9640 003 1570 for the models listed below
Typical Applications:
Used when repairing oil leaks, restoring crankcase sealing, or rebuilding engines on Stihl disc cutters and other handheld machines. Common at crankshaft ends, clutch or flywheel sides, and other specified sealing points. Ideal for preventative maintenance where seals have hardened with age, exposure to heat, or fuel/oil mist, helping to preserve performance and reduce follow‐up issues.
Also known as:
Shaft seal, rotary shaft seal, radial oil seal, lip seal, crankshaft seal, sealing ring. Often referenced colloquially as an engine oil seal for two‐stroke tools and cut‐off saws.
Fits Models:
041, 041FB, 041G, 042 AV, 042AV, 048, 050, 051, 075, 076, FS20, FS360C, FS410, FS410AV, FS410C, MS241C, SG17, SG17L, TS400, TS410, TS420, TS480i, TS50, TS500i, TS510, TS760
Alternate Part Numbers:
9640-003-1570, 96400031570
Product Specifications
| L&S Part No. | 9640 003 1570 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 96400031570 |
| Unit of Sale | 1 |
| Size | 15 x 24 x 4mm |
| Applications | 041, 041FB, 041G, 042 AV, 042AV, 048, 050, 051, 075, 076, FS20, FS360C, FS410, FS410AV, FS410C, MS241C, SG17, SG17L, TS400, TS410, TS420, TS480i, TS50, TS500i, TS510, TS760 |
| Machine Type | Disc Cutters, Brushcutters |
| Fits Models | TS400 | TS410, TS420 | TS510 | FS360C FS410C | TS50 | TS480i, TS500i | FS20 | FS410AV (old model) | MS241C | 041 | 042 AV | 048 | 050, 051 | 076 | 075 | SG17, SG17L | TS760 |
