The Husqvarna 501894103 Piston Assembly is a genuine OEM component designed for the K1250, K1260, and 3122K power cutters. As a direct Husqvarna OEM part, it is manufactured to the same specification as the original, ensuring a correct fit within the engine's cylinder bore. This assembly is compatible across the K1250, K1260, and 3122K power cutter models, making it the right choice when rebuilding or restoring engine performance on these machines. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- OEM Cylinder Bore Tolerancing — manufactured to Husqvarna's exact bore diameter and ring groove specifications, ensuring proper compression sealing from the first start-up.
- Complete Assembly Fit — supplied as a full piston assembly, simplifying engine rebuild procedures and reducing the chance of mismatched components during installation.
- Confirmed Fitment — verified for the K1250, K1260, and 3122K power cutters; cross-reference part number 501894103 against your parts diagram before ordering.
- Restored Engine Compression — a correctly fitted piston assembly restores cylinder compression, delivering the consistent power output these heavy-duty power cutters are built for.
- Fuel System Integrity — proper piston fit prevents blow-by that can contaminate the crankcase with unburned fuel, protecting downstream engine components and maintaining safe operation.
The piston assembly sits at the heart of the two-stroke engine, converting the combustion of the fuel-air mixture into the mechanical force that drives the cutting blade. It works in direct contact with the cylinder wall, and the integrity of the piston and its rings determines how well the engine maintains compression and transfers power. When a piston wears or becomes damaged — through scoring, ring failure, or overheating — the engine loses compression, runs roughly, or fails to reach operating speed, leaving the cutter unable to perform effectively on demanding cut-off work. Replacing the worn assembly with a genuine OEM unit like this one restores the engine to its designed operating parameters.
Part Details
| Part Number | 501894103 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Piston Assembly |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Cutter | K1250 |
| Power Cutter | 3122K |
| Power Cutter | K1260 |
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.
