Description
Overview:
The Carburettor for Husqvarna 455 Rancher II Chainsaw, OEM No. 580 30 63 03, is a Genuine Husqvarna replacement part designed to restore correct fuel and air delivery to your two‑stroke engine. Built with a die‑cast aluminium body and precision brass metering components, it provides reliable starting, steady idling, and clean acceleration under load. This unit is engineered specifically for the Husqvarna 455 Rancher II, matching the original mounting pattern, fuel connections, and control linkages for a straightforward swap. Ideal for regular maintenance or when symptoms such as hard starting, surging, or poor top‑end power appear. Some units may be identified by the on‑body code “AT‑9 FO”, aligning with workshop references. As a genuine component, it supports the performance and longevity expected from Husqvarna chainsaws.
Key Features:
- Genuine Husqvarna carburettor; direct replacement for OEM No. 580 30 63 03
- Die‑cast aluminium construction with brass metering parts for durability and corrosion resistance
- Model‑specific fit for the 455 Rancher II: correct bolt spacing, throttle and choke linkages, and fuel line orientation
- Restores consistent fuel metering for easier cold starts, stable idle, and full‑throttle response
- Baseline settings applied at factory; final tuning via H, L, and idle screws as per service manual
- Diaphragm‑type design maintains performance across varying working angles and temperatures
- Compatible with standard two‑stroke petrol/oil mix at the manufacturer’s specified ratio
- Suitable for routine servicing to reduce downtime and extend engine life
Typical Applications:
Used to replace worn or faulty carburettors on Husqvarna 455 Rancher II chainsaws. Common in forestry, landscaping, farm, and domestic firewood work where reliable starting, smooth idle, and consistent cutting power are essential. Ideal during seasonal overhauls or when addressing issues like flooding, lean running, or hesitation under load.
Also known as:
Chainsaw carburettor, carb, carburetor (US), fuel mixer, metering carburettor, mixer assembly, AT‑9 FO carb unit.
Fits Models:
455 Rancher II
Alternate Part Numbers:
580306303, 580-30-63-03, 580 30 63 03, 580 30 63-03
Product Specifications
| L&S Part No. | 580 30 63 03 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 580306303 |
| Unit of Sale | 1 |
| Machine Type | Chainsaw |
| Fits Brands | Husqvarna |
| Fits Models | 455 RANCHER II |
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