Husqvarna Lawn Mower Blade

This blade is designed for 21-inch mower decks and is compatible with Husqvarna and Craftsman models. To be certain, check your mower's owner's manual or the underside of your deck for the specific OEM part number, which should match 539113312.

Yes, this is an OEM component. Choosing OEM parts ensures the blade meets the exact specifications and material standards required for your mower's performance and safety.

Generally, you should replace your blade once a year or every 50 to 100 hours of use. If you notice your grass has frayed, brown tips after mowing, or if the blade shows visible nicks or dull edges, it is time for a replacement.

This blade is designed for straightforward installation and can typically be replaced at home with basic tools. Just ensure you disconnect the spark plug wire before starting to prevent accidental startup during the process.

Using a blade that perfectly matches your deck size is critical for airflow and suction. A precise fit ensures the grass is lifted properly for a clean, even cut and prevents the mower from vibrating or damaging the deck housing.