Blade.21" 539112787

Basic Information

• Part Name: Lawn Mower 21-in Deck 3-in-1 Blade
• Manufacturer: Husqvarna
• Category: Lawn Mower Parts
• Primary Function: Cuts grass and supports discharge, bagging, or mulching functions

Technical Specifications

• Length: 21 inches
• Width: 2-1/4 inches
• Center Hole: 5/8 inch

Installation & Compatibility

• Compatible Models: Fits various Husqvarna lawn mower models. Please confirm this part is correct for your model before ordering.
• Installation Difficulty: Medium; requires disassembly of the mower deck
• Tools Required: Socket wrench, torque wrench, work gloves

Additional Information

Part number 532189028 is a 21-inch 3-in-1 lawn mower blade that replaces 189028 and 5321890-28. It supports side discharge, bagging, and mulching, making it a good fit for different mowing setups.

If your mower leaves clumps of grass behind, struggles with mulching, or cuts unevenly, the blade may be worn or damaged. Swapping in a new one helps restore cutting performance and improves overall mowing results.

Before installing, disconnect the spark plug wire and wear work gloves to protect your hands. Use a socket wrench to remove the old blade, then install and torque the new one to the manufacturer s specifications. Check that the blade is centered and secure before use.