581043901 Mulching Blades for 46" Deck, Compatible with Hu-sqvarna TS246 TS346 YT46LS YTH224TFI YTH224T, 2 Pack

What It Is

This is a 2-pack of aftermarket mulching blades designed for 46-inch cutting decks on various Hu-sqvarna lawn tractors. Mulching blades have a curved, high-lift design that recuts grass clippings into fine particles for natural lawn fertilization, eliminating the need for bagging.

Fitment & Compatibility

Before buying, verify these three things:

1. Deck size: Must be a 46-inch cutting deck. Measure your deck if unsure—this is the most common fitment error.
2. Model match: Confirmed compatible with Hu-sqvarna TS246, TS346, YT46LS, YTH224TFI, YTH224T. Also fits some Craftsman, Poulan, and Husqvarna tractors with 46" decks using OEM part 581043901. Check your owner’s manual or existing blade part number.
3. Measurements: Blade length is 18-1/4 inches, center hole is 1 inch diameter, with a 5-point star center. Measure your old blade’s length and hole pattern. If your spindle has a different center (e.g., round or 6-point), these won’t fit.

Key Things to Know

• Installation: Moderate difficulty. You’ll need a socket wrench, torque wrench (recommended 70-90 ft-lbs), and a block of wood to prevent blade rotation. Always lift the mower deck or remove the blade with the spark plug disconnected.
• Quality: At $24.99 for a 2-pack, these are budget-friendly compared to OEM blades (usually $35-50 per pair). Some users report slightly shorter lifespan than OEM, but adequate for residential use.
• Balance check: Aftermarket blades sometimes arrive unbalanced. Before installing, hang each blade on a nail or use a blade balancer. An unbalanced blade causes vibration, poor cut, and spindle wear.
• Mulching vs. side discharge: These are strictly for mulching. If you want to bag or side-discharge, you’ll need a different blade type or a conversion kit.

Should You Buy It

Buy this if you have a 46-inch Hu-sqvarna or compatible tractor, want to switch to mulching for natural lawn care, and are comfortable confirming fitment yourself. It’s a good value for residential use, but if you need OEM reliability for commercial mowing or heavy-duty conditions, spend extra on factory blades.