2105200317A Mulching Blade Compatible with 21" Mu-rray Da-ye Hyper Tough MNA152901 MNA152903 MNA152701 Push Mower, Repace 2105200317 84005221, Replace for 2 Pack

What It Is

This is a mulching blade set (2-pack) designed for 21-inch walk-behind push mowers, specifically compatible with Murray, Daye, and Hyper Tough models. Its curved design cuts grass into fine clippings that decompose quickly, eliminating the need for bagging.

Fitment & Compatibility

Check these before ordering:

• Deck size: Fits only 21-inch cutting decks. Measure your deck’s blade bolt hole pattern (center hole diameter ~1 inch, but verify).
• Model numbers: Confirmed fit for MNA152901, MNA152903, MNA152701. Also replaces OEM part 2105200317 and 84005221.
• OEM vs aftermarket: This is a direct replacement for Murray/MTD OEM blades. If your mower uses a different brand (e.g., Toro, Honda, Craftsman), measure center hole and width—many 21-inch blades are not interchangeable.
• Physical dimensions: Blade length ~21 inches, width ~2 inches, thickness ~0.1 inch. Measure your old blade to confirm.

Key Things to Know

• Quality: 4.4 stars from 91 reviews—most users report sharp out of box and balanced. A few note slight vibration if not torqued evenly.
• Installation: Moderate. Use a socket wrench to remove the center bolt (usually 5/8 or 3/4 inch). Torque to 30-40 ft-lbs. Mark blade orientation (sharp edge forward) before removing old one.
• Common gotcha: Mulching blades work best with a mulching plug installed—without it, clippings may clump. Also, they dull faster than standard blades if you mow wet grass or over debris.
• Edge vs OEM: At $24.99 for two, it’s cheaper than OEM single blades. But if your mower has a specific lift design (e.g., for bagging), this may not improve bagging performance.

Should You Buy It

Buy this if you own a 21-inch Murray, Daye, or Hyper Tough push mower and want an affordable mulching upgrade that produces fine clippings for lawn feeding. Avoid if you need a bagging or standard lift blade, or if your mower uses a non-standard center hole size. For the price and rating, it’s a solid value for most DIY homeowners.