Description
Overview:
This circlip is a genuine Villiers retaining clip for the 3:1 reduction gear shaft on MK12 and C12 engines. Made from durable hardened steel, it snaps into the shaft groove to stop axial movement of gears, spacers, or bearings, helping to maintain correct end-float and alignment within the reduction unit. The part is identified by OEM number 21765 and is suitable for service, overhaul, or restoration of these classic engines. As unused old stock, it may show minor tarnish from storage, but this does not affect performance. A secure, correctly sized circlip is vital for stable gear mesh, smooth power transmission, and reduced wear in the reduction gearbox, especially under vibration and load typical of small plant, garden machinery, and stationary engine applications.
Key Features:
- Genuine Villiers part for assured compatibility and reliability
- OEM reference 21765 for precise identification
- Retains components on the 3:1 reduction gear shaft to prevent axial movement
- Hardened steel construction for strength and long service life
- Consistent fit in the shaft groove for a secure, positive hold
- Helps maintain correct end-float and stable gear mesh
- Unused old stock; cosmetic ageing may be present without affecting function
- Suitable for maintenance, rebuilds, and vintage engine restoration
Typical Applications:
Used during servicing or rebuilding of Villiers MK12/C12 reduction gearboxes to secure gears, spacers, or bearings on the shaft. Ideal when the original circlip is missing, distorted, or has lost tension. Helps prevent component drift under vibration, supports smooth drive output, and protects the gearbox from premature wear in equipment powered by these engines.
Also known as:
C-clip, locking ring, groove ring, axial retainer, shaft retaining clip. These terms describe a circular spring clip that fits into a machined groove on a shaft to hold components in place and resist axial loads during operation.
Fits Models:
C12, MK12
Alternate Part Numbers:
21765
Product Specifications
| L&S Part No. | 21765 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Villiers |
| OEM No. | 21765 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Villiers |
| Key Features | - Genuine Villiers part for MK12/C12 engines - OEM number 21765 for precise identification - Hardened steel for strength and durability - Retains components on 3:1 reduction gear shaft - Suitable for vintage engine restoration and maintenance |
| Fits Models | C12 | MK12 |

