Description
Overview:
This Genuine Husqvarna piston ring (MPN 505 21 57 01) is an OEM replacement for petrol chainsaws such as the Husqvarna 555 and 560XP. Made from high‐grade steel for strength and wear resistance, it seals the combustion chamber to maintain correct compression and power. Replacing a worn ring restores starting performance, reduces blow‐by, and supports clean, efficient running. Designed to match the original specification, it fits precisely in the piston groove and is suitable for routine maintenance or a top‐end refresh. Built for the demands of forestry, arborist, and heavy garden work, it helps protect cylinder and piston life when paired with correct lubrication and servicing. Genuine status ensures compatibility, reliability, and consistent fit.
Key Features:
- Genuine Husqvarna OEM part for trusted fit and performance (MPN 505 21 57 01)
- Helps restore compression, power output, and throttle response
- Precision finish for smooth seating in the piston groove and reduced wear
- Supports reliable starting and consistent cutting performance under load
- Engineered to Husqvarna tolerances for the specified models
- Durable steel construction for long service life when maintained correctly
- Suitable for routine top‐end maintenance and rebuilds
- Compatible with standard service procedures; check ring end gap to the service manual
- Helps reduce blow‐by and oil/fuel consumption issues caused by worn rings
- Non‐oversize replacement matching original equipment dimensions for listed models
Typical Applications:
Replacement of a worn or damaged piston ring during chainsaw servicing or a top‐end rebuild. Used to restore compression after heavy use, scoring, or loss of power. Suitable for professional forestry, arborist work, farm and estate maintenance, and demanding DIY tasks where dependable engine performance is required.
Also known as:
Engine ring, compression ring, cylinder ring, piston sealing ring.
Fits Models:
555, 556, 560XP, 560XPG, 562XP, 562XPG
Alternate Part Numbers:
505 21 57-01, 505215701
Product Specifications
| L&S Part No. | 505 21 57 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 505215701 |
| Unit of Sale | 1 |
| Applications | 555, 556, 560XP, 560XPG, 562XP, 562XPG |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Fits Models | 555 | 556 | 560XP, 560XPG | 562XP, 562XPG |
