Husqvarna Throttle Control - 578864301
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Blueperry agriculture (UK)Husqvarna Throttle Cable 578864301
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Product Information
Full details
The Husqvarna Throttle Control (part number 578864301) is a vital OEM replacement component designed for professional landscapers and homeowners maintaining Husqvarna 322L and 522L string trimmers. It serves as the primary interface for managing engine speed and power output during operation, ensuring a responsive and reliable connection between the handle and the carburetor. While it is built to original factory specifications for a perfect fit, users must verify their specific machine serial number prior to purchase, as minor production variations can exist within the same model series.
All features
| Model Part Number | 578864301 |
|---|---|
| Brand | Husqvarna |
Extended Product Information
FAQs
Is this part compatible with my older Husqvarna trimmer?
This part is specifically designed for 322L and 522L models. Please check your machine's model and serial number against the 578864301 specification.
Do I need special tools to install this?
No, standard screwdrivers are typically sufficient to open the handle housing and replace the throttle assembly.
Does this include the throttle cable?
This is the throttle control assembly; please refer to your specific kit contents as the cable is often sold separately depending on the distributor.
Why should I use OEM parts instead of aftermarket?
OEM parts ensure exact tolerance matching, which is critical for throttle sensitivity and the long-term health of your engine linkage.
How do I ensure this is the right part?
Cross-reference the part number 578864301 with your specific Husqvarna owner's manual or the parts lookup tool on the Husqvarna website using your serial number.
Troubleshooting
Throttle lever feels loose or does not snap back
Inspect the internal return spring and ensure the cable is not kinked or frayed within the casing.
Engine RPM does not increase when lever is pressed
Check that the throttle cable barrel is properly seated in the new control unit and that the cable end at the carburetor hasn't slipped.
Pros and Cons
Pros
- Perfect fit for specified Husqvarna 322L and 522L models
- Reliable, consistent throttle response
- High-quality, long-lasting construction materials
- Maintains manufacturer warranty standards by using OEM parts
Cons
- Compatibility limited strictly to specific model variants
- Requires disassembly of the handle housing for installation
- Does not include new mounting screws or cabling in some packages
Setup, Compatibility & Care
Installation requires basic mechanical knowledge and common hand tools, typically a screwdriver set. Before starting, ensure the machine is powered off and the spark plug wire is disconnected for safety. Open the handle housing, carefully note the routing of the throttle cable, and swap the damaged unit for the new 578864301 part.
To prolong the life of your new throttle control, keep the handle housing clear of debris, grass clippings, and moisture, which can cause internal corrosion or sticky linkages over time. Always verify your specific serial number before ordering, as Husqvarna often updates model components throughout a production run.