The Husqvarna 503665601 Decompression Valve is a genuine OEM replacement designed for K-series power cutters including the K750, K950, K960, K970, K1250, K1260, K950Rescue, and 3122K. As a direct OEM component, this valve is manufactured to Husqvarna's exact specifications, ensuring a correct fit and consistent engine behavior every time. Cross-reference part number 503665601 against your parts diagram to confirm compatibility with your specific machine before ordering. DHS Equipment supplies this part to help keep your power cutter operating at full capacity.
Key Features
- Genuine OEM Compression Relief — Manufactured to Husqvarna's exact valve tolerances, ensuring the correct pressure release threshold for consistent, safe engine starts.
- Direct Engine Port Fit — Engineered to thread directly into the cylinder head of compatible K-series power cutters with no modification to the port or surrounding hardware.
- Broad K-Series Compatibility — Fits the K750, K950, K960, K970, K1250, K1260, K950Rescue, and 3122K power cutters, covering a wide range of Husqvarna's professional handheld cutting line.
- Restored Pull-Start Effort — A functioning decompression valve significantly reduces the force needed to pull-start the engine; a failed or stuck valve makes starting the machine unnecessarily difficult and stressful on the recoil system.
- Operator Safety Compliance — A correctly seating decompression valve is part of the engine's designed starting sequence; using a genuine OEM replacement maintains the safe, controlled start behavior Husqvarna engineered into these power cutters.
The decompression valve is a small but critical engine component fitted into the cylinder head of a power cutter. During the compression stroke, the valve briefly vents pressure from the combustion chamber, reducing the resistance the operator feels when pulling the starter cord. Once the engine fires and begins running, the valve closes automatically and the cylinder operates at full compression. When this valve sticks open, the engine loses power and may run roughly or fail to reach full speed; when it sticks closed or is absent, pull-starting the engine requires significantly more effort and places additional strain on the recoil starter assembly.
Part Details
| Part Number | 503665601 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Decompression Valve |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Cutter | K950 |
| Power Cutter | K960 |
| Power Cutter | K1250 |
| Power Cutter | K750 |
| Power Cutter | K950Rescue |
| Power Cutter | K970 |
| 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.
