The Husqvarna 503289017 Piston Ring is a genuine OEM component designed for K650, K700, and K650CutnBreak power cutters. As a direct OEM replacement, this piston ring is manufactured to Husqvarna's exact specifications, ensuring proper cylinder seal, correct compression, and consistent engine output in demanding cut-off saw applications. This ring fits directly into the cylinder bore of compatible power cutters with no modification, making it the straightforward choice when rebuilding or overhauling your machine's top end. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- OEM Compression Tolerance — manufactured to Husqvarna's exact ring gap and radial thickness specifications, maintaining the cylinder pressure needed for full engine power output
- Drop-In Top-End Replacement — sized to match the original bore diameter on K650, K700, and K650CutnBreak power cutters, seating correctly without additional machining or adaptation
- Broad Power Cutter Compatibility — verified fitment across the K650, K700, and K650CutnBreak models, covering a wide range of professional-grade Husqvarna handheld power cutters
- Restored Engine Performance — a worn piston ring causes loss of compression, hard starting, increased oil consumption, and reduced blade speed; replacing it restores the engine's ability to deliver consistent cutting power
- Fuel System Integrity — correct ring sealing prevents unburned fuel blow-by into the crankcase, protecting bearings and seals from fuel contamination during extended use
A piston ring forms the dynamic seal between the piston and the cylinder wall, maintaining the compression necessary for combustion while also controlling the thin film of oil that lubricates the bore. In a two-stroke power cutter engine, this ring endures extreme heat and friction with every cutting cycle. When the ring wears, compression drops, engine response becomes sluggish, and the machine struggles to reach operating speed under load. Replacing the piston ring as part of a top-end service restores cylinder compression, returns throttle responsiveness, and extends the service life of the cylinder and piston assembly.
Part Details
| Part Number | 503289017 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Piston Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Cutter | K650 |
| Power Cutter | K700 |
| Power Cutter | K650CutnBreak |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
