Mulching Mower Blade Replacement for Snapper 703371 Fits 21 Inch Walk-Behind Mowers Models SP70 SP80 SP90 SP95 SP100 SP105, Bow-Tie Center Hole 1 Pack

What It Is

This is a direct-replacement mulching blade for Snapper 21-inch walk-behind mowers, designed to chop clippings finely and recirculate them into the turf. It fits SP70, SP80, SP90, SP95, SP100, and SP105 models with the bow-tie center hole pattern.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: This blade is only for 21-inch decks. Measure your blade tip-to-tip if unsure.
• Center hole: Must be the bow-tie (four-lobed) shape, not a standard star or round hole. Snapper uses this pattern on most SP-series mowers.
• OEM part number: Snapper 703371 is the original. This aftermarket blade matches that spec exactly. Check your current blade’s part number or cross-reference your mower model (e.g., SP100, SP105) in the manual.

Do not use on 20-inch or 22-inch decks, or on mowers with a different center hole shape (e.g., Craftsman or Toro).

Key Things to Know

• Quality: High-carbon steel with a durable coating. Should last a full season under normal use, but inspect for bends after hitting rocks or roots.
• Installation: Easy—remove the old blade, clean the spindle, and torque the bolt to 35–45 ft-lbs. Use a blade-stopping tool or wedge a block of wood to keep the blade from spinning.
• Gotcha: Mulching blades have a curved, high-lift design. They work best with the mulching plug or baffle installed—without it, discharge may clog.
• Single pack: You get one blade. If your mower has two blades (unlikely on 21-inch Snappers), you’ll need two packs.

Should You Buy It

If you own a Snapper SP-series 21-inch walk-behind with the bow-tie center hole and want a drop-in mulching blade that outperforms a standard lift blade in fine chopping, this is a solid, affordable choice. Avoid if you need a bagging or side-discharge blade, or if your deck size or center hole doesn’t match.