The Husqvarna 503633201 Needle Idle Speed is a genuine OEM carburetor component designed for the K1250, K1260, and 3122K power cutters. As an authentic Husqvarna part, it is manufactured to the exact tolerances required for precise fuel and air metering at idle, ensuring the carburetor performs exactly as the engine demands. This needle is a direct replacement for the original, fitting the carburetor assembly without modification and restoring correct idle characteristics to your cutter. DHS Equipment supplies this part to help keep your equipment running at peak performance on the job.
Key Features
- OEM Carburetor Tolerancing — Manufactured to Husqvarna's exact dimensional specifications, ensuring the needle seats and meters fuel with the precision the carburetor circuit requires.
- Direct Carburetor Fit — Engineered as a drop-in replacement for the original needle, seating correctly in the carburetor body without rework or adaptation.
- Confirmed Fitment — Compatible with the K1250, K1260, and 3122K power cutters; cross-reference 503633201 against your parts diagram to confirm application before ordering.
- Restored Idle Control — A correctly functioning needle maintains stable idle speed and smooth throttle response; a worn or damaged needle leads to erratic idling, stalling, and difficult starting.
- Fuel System Integrity — Using the correct OEM needle helps maintain a properly sealed and calibrated fuel circuit, reducing the risk of lean-running conditions that can cause engine damage over time.
The idle speed needle is a small but critical component within the carburetor that regulates the flow of fuel through the idle circuit at low engine speeds. It controls the fuel-to-air mixture delivered to the engine when the throttle is at rest, directly influencing idle stability, cold starting behavior, and the transition to full throttle. When this needle becomes worn, bent, or damaged, the engine may idle roughly, stall under load, or refuse to hold a consistent speed — all conditions that interrupt cutting work and can place added stress on the engine.
Part Details
| Part Number | 503633201 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Needle Idle Speed |
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.
