8TEN LawnRAZOR Mower Blade 21 inch Deck for AYP Husqvarna Poulan 165833 175064 176135 189028 532406712 (Mulching) 2 Pack

What It Is

The 8TEN LawnRAZOR Mower Blade is a 21-inch mulching blade designed for AYP, Husqvarna, and Poulan walk-behind mowers. It replaces OEM part numbers 165833, 175064, 176135, 189028, and 532406712, and is sold as a 2-pack for dual-blade decks or spares.

Fitment & Compatibility

• Deck size: Must be exactly 21 inches—measure your blade length from tip to tip, not the deck.
• Brands/models: Fits Husqvarna, Poulan, and many AYP (American Yard Products) models with the listed OEM numbers. Check your owner’s manual or current blade part number.
• Center hole: 5-point star (common on AYP/Husqvarna). Verify your spindle shape before buying—round or square holes won’t fit.
• Thickness: 0.203 inches (standard for these brands). Measure old blade thickness if unsure.
• OEM vs aftermarket: This is an aftermarket blade, not OEM. It matches dimensions and hole pattern but may differ slightly in steel composition or coating.

Key Things to Know

• Mulching only: Designed for fine clipping recutting, not bagging or side-discharge. Use only with a mulch plug installed.
• Installation: Requires a torque wrench—tighten to 40-50 ft-lbs. Over-tightening can strip spindle threads.
• Balance: Blades are pre-balanced, but always check with a balancer after sharpening. Unbalanced blades cause vibration and bearing wear.
• Lift wings: The curved wings are aggressive—ensure they clear the deck interior before first use. Test spin by hand.

Should You Buy It

If you have a Husqvarna, Poulan, or AYP 21-inch deck with a 5-point star spindle and want a reliable mulching blade at a fair price, this 2-pack is a solid choice. It’s not OEM, but the 4.6-star rating and consistent fitment make it a safe buy for most DIY homeowners. Avoid it if you need a bagging or high-lift blade.