Description
Overview:
This genuine Husqvarna piston ring is a critical engine component for selected Husqvarna chainsaws, including the 365 and 262. Made from durable, engine-grade steel, it sits in the piston groove to seal the combustion chamber, maintain compression, and support efficient fuel burn. A correct seal helps the saw start reliably, hold power under load, and run smoothly while controlling blow-by. The ring is designed to fit the intended Husqvarna cylinders with the right tension and profile for dependable operation. Supplied to OEM specification under part number 503 28 90-15, it is suitable for routine maintenance or top-end rebuilds where restoring compression and performance is the priority. This is a Genuine Husqvarna Part for users who want correct fit and long service life.
Key Features:
- Genuine Husqvarna part for assured compatibility and quality
- OEM number 503 28 90-15 for accurate identification and ordering
- Helps restore and maintain cylinder compression for steady power output
- Supports efficient combustion for cleaner running and easier starting
- Durable construction for sustained performance in professional and DIY use
- Designed to fit the intended piston groove with the correct ring tension
- Smooth operation when installed to manufacturer procedures and tolerances
- Suitable for preventative maintenance and full top-end rebuilds
Typical Applications:
Used during engine servicing, repairs, and rebuilds on compatible Husqvarna chainsaws to recover lost compression, stabilise idle, and improve cutting performance. Ideal when replacing worn pistons or cylinders, or after high hours of use where sealing efficiency has dropped. Helps keep saws reliable for felling, snedding, logging, landscaping, and general site work.
Also known as:
Compression ring, top ring, engine piston ring, cylinder sealing ring, chainsaw engine ring, Husqvarna OEM ring, replacement piston ring for two-stroke chainsaws.
Fits Models:
261, 262, 262XP, 265RX, 362, 365, 365H, Husqvarna 365
Alternate Part Numbers:
503 28 90-15, 503289015
