Description
Overview:
This genuine Husqvarna ring is a precision engine component for the 350 and 351 petrol chainsaws. Made from high-grade, hardened spring steel, it sits in the piston groove to seal the combustion chamber, helping to maintain correct compression and smooth running. Replacing a worn or damaged ring restores starting performance, power delivery and idle stability, and helps reduce blow-by and excessive fuel use. Built to Husqvarna's OEM specification, it provides an exact fit and dependable operation in the demanding conditions typical of chainsaw use. Supplied as a single ring to match the original part, it is suitable for routine servicing or a top-end refresh when performance has dropped due to normal wear. OEM reference: 503 86 65-01.
Key Features:
- Genuine Husqvarna part for assured compatibility and fit
- Hardened spring-steel construction for durability and long service life
- Helps restore compression for easier starting and consistent power
- Precision-ground face for reliable sealing in the cylinder
- Stable running and reduced blow-by compared with worn components
- Designed to meet OEM clearances and tolerances in the 350/351 engines
- Smooth installation with standard workshop tools and correct technique
- Suitable for preventative maintenance during top-end overhauls
- Supports reliable cutting performance under professional and DIY use
- Direct replacement for OEM No. 503 86 65-01
Typical Applications:
Used during engine servicing or rebuilds to replace a worn piston ring in Husqvarna 350 and 351 chainsaws. Ideal when compression tests show low readings, when the saw is hard to start, lacks power, smokes excessively, or after a cylinder rehone or piston replacement to ensure a proper seal and reliable day-to-day operation.
Also known as:
Piston ring, compression ring, cylinder ring, engine ring, top ring, chainsaw piston ring, replacement engine ring for Husqvarna two-stroke saws.
Fits Models:
350, 351
Alternate Part Numbers:
503 86 65-01, 503866501
Product Specifications
| L&S Part No. | 503 86 65 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 503866501 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Key Features | - Genuine Husqvarna part ensures compatibility with 350/351 chainsaws - Hardened spring-steel construction for durability - Precision-ground face for reliable cylinder sealing - Restores compression for easier starting and power - Direct replacement for OEM No. 503 86 65-01 |
| Fits Models | 350 | 351 |
