Description
Overview:
This is a Genuine Stihl crankshaft oil seal sized 15 x 25 x 5 mm (0.59 x 0.98 x 0.20 in) for use on Stihl petrol chainsaws. It is an oil‐resistant elastomer rotary shaft seal with a spring‐loaded sealing lip, engineered to keep oil in and air out at the crankshaft ends. By maintaining proper sealing at the crankcase, it supports correct lubrication, fuelling and engine performance, helping prevent lean running and wear. Suitable for a wide range of Stihl saws, including popular models such as MS 180 and MS 250, it is designed for an exact OEM fit to the housing and shaft, making it a reliable choice for routine overhauls or repairs where sealing integrity is required.
Key Features:
- Genuine Stihl part for assured fit and performance on specified models.
- Dimensions 15 x 25 x 5 mm (0.59 x 0.98 x 0.20 in) for precise crankshaft sealing.
- Oil‐ and fuel‐resistant elastomer construction with spring-loaded lip for stable sealing.
- Helps prevent oil leaks and air ingress that can cause poor idle and hard starting.
- Supports correct crankcase pressure and lubrication for efficient engine operation.
- Suitable for flywheel or clutch side positions where specified by the model.
- Durable design for demanding cutting environments and temperature changes.
- OEM-quality finish for straightforward installation with appropriate seal tools.
- Reduces risk of premature wear to bearings and pistons by maintaining seal integrity.
Typical Applications:
Replacement of worn or damaged crankshaft seals during chainsaw servicing, engine rebuilds, or when diagnosing air leaks, fluctuating idle, lean running, or oil seepage. Common in workshop maintenance for forestry, landscaping, arborist work, and domestic firewood cutting where reliable sealing is essential.
Also known as:
Crankcase oil seal, rotary shaft seal, main crank seal, primary shaft seal, flywheel-side seal, clutch-side seal, engine oil seal, radial lip seal.
Fits Models:
017, 018, 019 T, 019T, 021, 023, 025, 028, 028 AV, 028AV, GS 461, GS461, MS 162, MS 162 C, MS 170, MS 170 C, MS 171, MS 172, MS 172 C, MS 180, MS 180 C, MS 181, MS 181 C, MS 182, MS 182 C, MS 190 T, MS 191 T, MS 210, MS 210 C, MS 211, MS 211 C, MS 230, MS 230 C, MS 231, MS 231 C, MS 250, MS 250 C, MS 251, MS 251 C, MS 270, MS 270 C, MS 271, MS 271 C, MS 280, MS 280 C, MS 291, MS 291 C, MS 311, MS 391, MS162, MS162 / MS162C, MS162C, MS170, MS170C, MS171, MS171C, MS172, MS172 / MS172C, MS172C, MS180, MS180C, MS181, MS181C, MS182, MS182 / MS182C, MS182C, MS190T, MS191T, MS210, MS210C, MS211, MS211C, MS230, MS230C, MS231, MS231C, MS250, MS250C, MS251, MS251C, MS270, MS270C, MS271, MS271C, MS280, MS280C, MS291, MS291C, MS311, MS391
Alternate Part Numbers:
9639 951 1585, 9638-003-1581, 96399511585, 96380031581
Product Specifications
| L&S Part No. | 9638 003 1581 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 96380031581 |
| Unit of Sale | 1 |
| Size | 15x25x5mm |
| Applications | 017, 018, 019 T, 019T, 021, 023, 025, 028, 028 AV, 028AV, GS 461, GS461, MS 162, MS 162 C, MS 170, MS 170 C, MS 171, MS 172, MS 172 C, MS 180, MS 180 C, MS 181, MS 181 C, MS 182, MS 182 C, MS 190 T, MS 191 T, MS 210, MS 210 C, MS 211, MS 211 C, MS 230, MS 230 C, MS 231, MS 231 C, MS 250, MS 250 C, MS 251, MS 251 C, MS 270, MS 270 C, MS 271, MS 271 C, MS 280, MS 280 C, MS 291, MS 291 C, MS 311, MS 391, MS162, MS162 / MS162C, MS162C, MS170, MS170C, MS171, MS171C, MS172, MS172 / MS172C, MS172C, MS180, MS180C, MS181, MS181C, MS182, MS182 / MS182C, MS182C, MS190T, MS191T, MS210, MS210C, MS211, MS211C, MS230, MS230C, MS231, MS231C, MS250, MS250C, MS251, MS251C, MS270, MS270C, MS271, MS271C, MS280, MS280C, MS291, MS291C, MS311, MS391 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS170, MS170C | MS180, MS180C | MS230, MS230C | MS250, MS250C | MS270, MS270C, MS280, MS280C | 028, 028AV | MS171, MS171C | MS181, MS181C | MS211, MS211C | 017 | 018 | 019T | 021, 023, 025 | MS231, MS251 | MS271, MS271C, MS291, MS291C | MS311 | MS391 | MS190T | MS191T | GS461 | MS162 / MS162C | MS172 / MS172C | MS182 / MS182C | MS212 / MS212C |
