21 Inch Mower Blade for Snapper, Mulching Blade Replacement for Briggs and Stratton Walk-Behind Push Lawn Mower Accessories Part # 703371, Fit for SP60, SP100, 7800924, 7800961, 1696700, 1696844

What It Is

This is a 21-inch mulching blade replacement designed for Snapper walk-behind mowers and compatible Briggs & Stratton push mowers. It uses OEM part # 703371 to finely chop grass clippings for nutrient recycling, ideal for frequent mowing without bagging.

Fitment & Compatibility

Before buying, confirm these three things:

• Deck size: Blade is exactly 21 inches long; measure your current blade from tip to tip (center hole to tip is ~10.5 inches). Only fits 21-inch decks.
• Model fit: Direct replacement for Snapper SP60, SP100, and Briggs models 7800924, 7800961, 1696700, 1696844. Check your mower’s model number under the seat or on the engine shroud.
• Center hole & drive: Uses a 5-point star center hole (common for Snapper/Briggs). Verify your blade adapter matches – if you have a round hole with keyway, this won’t fit without swapping the adapter.
• OEM vs aftermarket: This is an OEM Snapper blade, not a universal. It matches original specs for thickness (0.150”) and lift profile.

Key Things to Know

• Mulching vs. standard: This blade has a curved, high-lift design for recutting clippings. Don’t use it for bagging or side-discharge unless you swap to a dedicated blade.
• Installation difficulty: Easy – one bolt (usually 5/8” or 15/16” socket). Torque to 40-50 ft-lbs. Use thread locker if your manual recommends it.
• Sharpness out of box: Blades come unsharpened. Hand-file the cutting edge before first use for best performance.
• Balance check: Always balance after sharpening; an unbalanced blade vibrates and damages spindle bearings. A $10 magnetic balancer is worth it.

Should You Buy It

If you own a Snapper SP60/SP100 or a compatible Briggs walk-behind with a 21-inch deck and want genuine OEM quality for mulching, this is a solid pick. It’s reliable, fits perfectly, and the high rating confirms it. Skip it if you need a bagging or standard lift blade – get the correct type for your cutting style.