The Husqvarna 503578701 Idle Speed Screw is a genuine OEM component designed for K950, K650, K700, K650CutnBreak, and K950Rescue power cutters. As a direct OEM replacement, this screw is manufactured to Husqvarna's exact specifications, ensuring correct carburetor adjustment and consistent engine idle behavior. DHS Equipment supplies this part to help keep your power cutter running at peak performance. Cross-reference part number 503578701 against your parts diagram to confirm fitment before ordering.
Key Features
- OEM Carburetor Calibration — Manufactured to Husqvarna's exact thread pitch and adjustment range, so idle speed can be set precisely as the engine requires.
- Direct Drop-In Replacement — Installs into the original carburetor port with no modification, restoring correct idle adjustment function immediately.
- Broad Power Cutter Compatibility — Fits the K950, K650, K700, K650CutnBreak, and K950Rescue, covering a wide range of Husqvarna's professional-grade power cutters.
- Stable Idle for Consistent Cutting — A correctly adjusted idle speed screw keeps the engine running smoothly at low throttle, preventing stalling between cuts and supporting controlled blade engagement.
- Fuel System Integrity — Using the correct OEM screw maintains a proper carburetor seal, reducing the risk of fuel air leaks that can destabilize engine performance or create safety hazards.
The idle speed screw threads into the carburetor body and controls the minimum throttle position, setting the engine's baseline RPM when the trigger is released. When this screw is worn, damaged, or incorrectly adjusted, the engine may stall at idle, run excessively fast, or respond unpredictably during operation. Replacing it with the correct OEM part restores precise control over idle behavior, which is essential for safe blade handling and smooth transitions between cuts on professional power cutters.
Part Details
| Part Number | 503578701 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Idle Speed Screw |
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.
