Tri-Cut - 578449301

Name: Tri-Cut - 578449301
Brand: Husqvarna
SKU: icofttzebd
Availability: InStock

The Tri-Cut head is designed for use in coarser grass and terrain that contains stones. It feature...

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Genuine Husqvarna Tri Cut Trimmer Brushcutter Strimmer Head 578449101 M10

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Product Information

Full details

The Husqvarna Tri-Cut head is designed for professional landscapers and serious homeowners who manage rougher vegetation or terrain littered with stones. Its primary advantage is the use of durable, replaceable plastic flails that offer a clean cut on coarser grasses while maintaining high safety levels when trimming near obstacles like trees or wooden fences. A key caveat to keep in mind is that the plastic flails, while replaceable, will wear down faster than traditional metal blades when used against very hard surfaces, requiring periodic maintenance to ensure optimal cutting performance.

All features

Model Part Number	578449301
Brand	Husqvarna

Extended Product Information

FAQs

Can I use the Tri-Cut head on any trimmer?

This head is designed for specific Husqvarna trimmers. Check your owner's manual to ensure compatibility with your specific model number.

How do I know when to replace the flails?

Replace the flails when they become noticeably shorter, blunt at the ends, or show signs of structural cracking.

Is this head safe for clearing around stone?

Yes, the plastic material is designed to handle incidental contact with stones better than nylon line without the risk of damage associated with steel blades.

Does it work well on thick, woody brush?

It is designed for coarse grass and weeds. For thick, woody saplings, a dedicated brush blade or saw blade is recommended.

Can I sharpen the plastic flails?

No, the flails are designed to be replaced rather than sharpened, as sharpening can compromise the structural integrity of the plastic.

Troubleshooting

Flails are not extending during use

Check for debris or hardened dirt inside the flail housing that may be preventing movement; clean the mechanism thoroughly.

Excessive vibration during operation

Ensure all three flails are present and have worn down evenly; replace all three simultaneously if one is damaged to maintain balance.

Pros and Cons

Pros

Safer for use around sensitive landscaping features like trees
Highly visible flails are easy to inspect and replace
Excellent for rocky or debris-heavy terrain
Simple modular design for quick maintenance

Cons

Plastic flails require more frequent replacement than metal blades
May struggle with heavy woody brush compared to circular saw blades
Performance decreases as the tips of the flails wear down

Setup, Compatibility & Care

To install the Tri-Cut head, ensure your Husqvarna trimmer is powered off and the spark plug wire is disconnected. Use the provided arbor hardware to secure the head onto the trimmer shaft, verifying it is locked in place according to your specific trimmer model's manual. For care, regularly inspect the plastic flails for cracks or significant shortening. If the flails show jagged edges or reduced cutting efficiency, simply slide them out of their housing and replace them with new, genuine Husqvarna flails. Keep the housing free of mud and grass clippings to ensure the flails remain free-moving and fully retractable.