The Husqvarna 522990101 Piston Ring is a genuine OEM component designed for the K760, K770, and K760II power cutters. As a direct factory replacement, this piston ring meets Husqvarna's original engineering specifications, ensuring proper combustion chamber sealing and cylinder wall contact in these high-demand cutting machines. DHS Equipment supplies this part to help keep your equipment running at full capacity. Cross-reference part number 522990101 against your parts diagram to confirm fitment before ordering.
Key Features
- OEM-Spec Ring Geometry — Manufactured to Husqvarna's exact ring profile and tension specifications, ensuring correct cylinder wall contact and compression sealing across the K760, K770, and K760II power cutter range.
- Direct Drop-In Replacement — Engineered to the original piston groove dimensions for straightforward installation with no machining or adaptation needed.
- Broad Power Cutter Compatibility — Fits the K760, K770, and K760II power cutters, covering multiple models in Husqvarna's professional handheld cutting lineup.
- Compression Restoration — A worn or broken piston ring leads to lost compression, hard starting, and reduced cutting power. Replacing it with this OEM part restores full engine output and throttle response.
- Fuel Efficiency Maintained — A correctly seated ring prevents blow-by, keeping the fuel-air mixture contained in the combustion chamber for efficient operation and reduced exhaust smoke.
The piston ring forms a critical seal between the piston and the cylinder wall, maintaining compression within the combustion chamber so the engine can deliver consistent power to the blade. It also helps regulate oil consumption and transfers heat away from the piston into the cylinder wall. When a piston ring wears, loses tension, or breaks, the engine suffers from compression loss, difficult starting, excessive fuel consumption, and increased exhaust emissions — all of which compromise cutting performance on the job.
Part Details
| Part Number | 522990101 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Piston Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Cutter | K760 |
| Power Cutter | K770 |
| Power Cutter | K760II |
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.
