The Husqvarna 501821801 Throttle Shaft E-Ring is a genuine OEM component designed for K950, K650, K700, K650CutnBreak, and K950Rescue power cutters. This small but critical retaining ring secures the throttle shaft in position within the trigger assembly, ensuring consistent throttle response on every cut. As a genuine Husqvarna part, it is manufactured to the exact dimensions and material specifications of the original, delivering a drop-in fit with no guesswork. DHS Equipment supplies this part to help keep your power cutter performing at its best.
Key Features
- Genuine OEM Retention Geometry — Manufactured to Husqvarna's exact dimensional tolerances, this E-ring seats and locks with the same positive snap as the factory-installed component, maintaining correct shaft endplay.
- Direct Throttle Shaft Fit — Engineered to seat directly onto the throttle shaft groove in K-series power cutters, requiring no filing, shimming, or adaptation during installation.
- Broad K-Series Compatibility — Fits K950, K650, K700, K650CutnBreak, and K950Rescue power cutters, covering a wide range of professional Husqvarna cutting equipment.
- Restores Crisp Throttle Control — A worn or missing E-ring allows the throttle shaft to shift axially, causing erratic or unresponsive throttle action. Replacing it with part number this part restores smooth, predictable engine response.
- Operator Safety Relevance — The throttle shaft retainer is part of the engine control circuit; a secure, correctly functioning throttle mechanism is essential for safe, controlled operation of a handheld power cutter.
The Throttle Shaft E-Ring is a small circlip-style retaining ring that locks the throttle shaft laterally within the carburetor or trigger housing, preventing axial movement during operation. When this ring is intact, the throttle responds immediately and precisely to operator input, allowing accurate engine speed control throughout a cut. If the ring is lost, damaged, or omitted during a service, the shaft can shift out of position, leading to inconsistent throttle travel, throttle sticking, or a complete loss of engine speed control — any of which poses a serious handling hazard on a high-speed power cutter.
Part Details
| Part Number | 501821801 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Throttle Shaft E-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Cutter | K950 |
| Power Cutter | K650 |
| Power Cutter | K700 |
| Power Cutter | K650CutnBreak |
| Power Cutter | K950Rescue |
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.
