PowerSmart 21 in. Replacement Mower Blade — 21" OEM-fit 3-in-1 Steel Blade for Mulch/Bag/Side Discharge

The PowerSmart 21 in. Replacement Mower Blade (303071739) is a genuine steel 3-in-1 blade designed to restore cutting performance for 21" gas lawn mowers, delivering finer clippings for better mulch, bagging, or side discharge.

If your mower is leaving uneven cuts, producing large clumps, or filling the bag too quickly, a worn blade is often the cause. This OEM-quality replacement fits PowerSmart DB8721P, DV8621C2, DV8621P2, and DV8621S2 models and is built to match the original blade’s shape and specs so your mower can operate as intended. Installing a fresh blade improves cut quality, reduces clumping, and helps the mower bag hold more, making routine lawn care faster and more efficient.

How will this replacement blade improve my lawn’s appearance?

Finer, cleaner cuts reduce grass tearing and minimize clumps that can smother turf. That leads to a neater striped look and healthier regrowth. The blade’s edge geometry and proper balance are tuned to produce smaller clippings ideal for mulching or efficient bagging.

• Produces finer clippings to reduce clumping on the lawn
• Cleaner cuts promote uniform appearance and quicker recovery
• Balanced steel construction minimizes vibration for even cutting

Is this blade compatible with my PowerSmart 21" mower?

Yes—the part number 303071739 is made to replace the factory blade for specific PowerSmart 21" gas models. It matches the original blade length, width and thickness so it installs and performs like the OEM part. Always confirm your mower model before ordering for a precise fit.

• Fits PowerSmart DB8721P, DV8621C2, DV8621P2, DV8621S2
• Blade length 508mm (20"), width 57mm (2.2"), thickness 3.5mm (1/8")
• Designed for 21" deck compatibility

Can one blade do mulching, bagging, and side discharge well?

This is a true 3-in-1 blade engineered to handle all three discharge modes without swapping blades. Its cutting profile and airflow characteristics let it chop clippings finely for mulching while still providing the lift and flow needed for effective bagging and side discharge. That versatility saves time and reduces the number of spare blades you need to carry.

• Mulching: creates smaller clippings to feed back into the lawn
• Bagging: produces compact clippings so bags hold more
• Side discharge: maintains efficient grass ejection and flow

How durable and safe is this replacement blade?

Constructed from hardened steel, the blade is built for long wear and sustained cutting performance. Proper installation and regular inspection for nicks or imbalance will keep cutting efficient and minimize vibration. Replace the blade if it becomes bent or severely nicked to preserve mower safety and performance.

• Hardened steel construction for extended life
• Match to OEM shape helps keep blade balance correct
• Recommended regular sharpening and inspection for safety

Who this is for: This PowerSmart 21 in. replacement blade is intended for owners of compatible PowerSmart 21" gas mowers who want a reliable OEM-quality replacement that restores cut quality and offers all three discharge modes. It’s a practical choice for homeowners, small-property caretakers, and anyone who wants cleaner clippings, less bag emptying, and improved mowing efficiency without swapping blades between jobs.