Grasscool YTH22V46 Blades for Husqvarna 46 inch Mower Replace 405380 403107 Z246 YTH20K46 YTH21K46 YTH22K46 YTA22V46 Zero Turn Riding with 5-Star Mounting Pattern 532405380 (Mulching)

What It Is

This is a set of three mulching blades designed for Husqvarna 46-inch riding mowers and zero-turn models. They replace OEM part numbers 405380 and 403107, and are intended for fine grass clipping mulching rather than side-discharge or bagging.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Your mower must have a 46-inch cutting deck—no exceptions.
• Mounting pattern: These blades use a 5-star (pentagon) center hole. Do not confuse with 3-hole or oval patterns found on other decks.
• Model list: Fits Husqvarna YTH22V46, YTH20K46, YTH21K46, YTH22K46, YTA22V46, Z246, and similar 46-inch zero-turn models. Check your owner’s manual or current blade part number—if it’s 532405380, 405380, or 403107, these match.

Not compatible with 42-inch or 54-inch decks, or older Husqvarna models using different blade patterns.

Key Things to Know

• Mulching only: These blades have a curved, high-lift design to recut clippings. They won’t discharge well or bag effectively—use dedicated side-discharge blades if you need that.
• Installation: Requires a 5/8-inch socket and torque wrench. Tighten to 70–90 ft-lbs. A common mistake is over-tightening, which strips the spindle threads.
• Sharpness: Aftermarket blades often arrive unsharpened or with a dull edge. Consider honing them lightly before first use for cleaner cuts.
• Check spindle alignment: If your mower vibrates after installation, one blade may be slightly bent or the spindle shaft is worn. Inspect before blaming the blades.

Should You Buy It

Buy these if you have a Husqvarna 46-inch mower with a 5-star mounting pattern and want a budget-friendly mulching blade that delivers fine clippings for lawn nutrition. They’re a solid value at under $30, but skip them if you primarily bag or side-discharge—you’ll get better results with dedicated blades for those tasks.