Description
Overview:
This piston ring is a vital wear part for two‐stroke engines in Husqvarna/Partner cut-off saws, helping to restore sealing and compression in machines such as the K750 and K760. Built from durable, heat‐resistant materials, it maintains a tight seal between the piston and cylinder wall so the engine delivers steady power under load. Replacing a tired ring can improve starting, throttle response and cutting consistency, while helping to limit blow‐by and scoring. This is a non-genuine replacement part made to fit the specified models, suitable for routine top‐end servicing in workshop, site or hire-fleet environments where reliability matters.
Key Features:
- Non-genuine replacement part designed for Husqvarna/Partner K750 and K760 series cutters
- Helps restore compression for consistent power and easier starting
- Durable, heat‐resistant construction for demanding cutting conditions
- Precision-made for a consistent fit in the specified engine applications
- Supports smoother running by reducing blow‐by when installed with correct end gap
- Straightforward to fit during a top‐end service with standard tools
- Broad model coverage, aiding spares standardisation across fleets
- Cost‐effective fix versus a complete piston or cylinder replacement
Typical Applications:
Used during engine maintenance and rebuilds on cut-off saws working on concrete, masonry, stone and asphalt. Ideal for restoring performance after loss of compression, hard starting, or visible ring wear, whether in professional construction, landscaping, hire, or DIY settings.
Also known as:
Cylinder ring, engine ring, cut-off saw ring, compression ring, piston compression ring for power cutters.
Fits Models:
570II, 576XP, K750, K760, K760 Cut-n-Break, K760 II, K760 Rescue, K770
Alternate Part Numbers:
522 99 01-01, 503 28 90-47, 503289047, 522990101
Product Specifications
| L&S Part No. | 503 28 90 47 |
|---|---|
| Manufacturer | Husqvarna |
| OEM No. | 522990101 |
| Unit of Sale | 1 |
| Applications | 570II, 576XP, K750, K760, K760 Cut-n-Break, K760 II, K760 Rescue, K760Cut-n-Break, K760II, K760Rescue, K770 |
| Machine Type | Disc Cutters |
| Fits Brands | Husqvarna |
| Fits Models | K750 | K760 | K770 | K760 Cut-n-Break | K760 RESCUE | 570II | 576XP | K760 II |
