Description
Overview:
This genuine Husqvarna piston ring is a direct-fit engine sealing component for Husqvarna top-handle chainsaws, including the T540 XP and T540 XPII. It is a durable metal ring in a dark grey finish, engineered to sit in the piston groove and maintain tight combustion sealing. By preserving compression, it supports clean ignition, steady idle, and full cutting power under load. The ring helps limit blow-by and oiling issues, improving efficiency and helping the engine run reliably in professional and domestic use. As an OEM part, it matches the original specification for correct fit and function, making it suitable for routine servicing or a top-end refresh where performance has dropped due to wear.
Key Features:
- Genuine OEM Husqvarna part for assured compatibility and quality
- Designed to restore and maintain engine compression and power output
- Precision-made geometry for a proper seal between piston and cylinder wall
- Durable metal construction for high-heat and high-RPM use in chainsaws
- Helps reduce blow-by and improves starting, throttle response, and fuel efficiency
- Supports reliable running for arborists, landscapers, and maintenance crews
- Seamless fit in the specified models to minimise setup time and adjustment
- Suitable for scheduled top-end servicing or replacement after wear or scoring
- Straightforward to fit with standard workshop tools and good practices
Typical Applications:
Used during engine maintenance or rebuilds when compression has fallen, power is down, or starting becomes difficult. Ideal after high hours, ring wear, or minor cylinder refinishing. Common in workshop services for arborists, grounds maintenance, and construction users who require dependable performance from compact professional saws.
Also known as:
Piston compression ring, cylinder ring, engine compression ring, top ring, sealing ring for two-stroke chainsaw engines. Often referenced during top-end overhauls, deglazing, or ring replacement as part of routine preventative maintenance.
Fits Models:
T540 XP, T540 XPII, T540XP, T540XPII
Alternate Part Numbers:
577 96 05-01, 577-96-05-01, 577960501
