21" Lawn Mower Blades Fits Green Works 21" Deck Mower MO40L4413 MO40L03 MO48L4422 C3208101 (2-Pack)

What It Is

This is a 2-pack of 21-inch replacement blades designed for Green Works electric lawn mowers with a 21-inch cutting deck. They are intended for residential mowing on standard turf and replace worn or damaged OEM blades to restore cutting performance.

Fitment & Compatibility

Before buying, confirm your mower has a 21-inch deck—measure deck width or check your model number. These blades fit Green Works models MO40L4413, MO40L03, MO48L4422, and C3208101. They are aftermarket replacements, not OEM Green Works parts, so verify the blade mounting hole pattern: these use a center hole with a star-shaped drive (common on Green Works). Measure your old blade’s length (21 inches from tip to tip), width (typically 2–2.5 inches), and center hole diameter (about 5/8 inch). If your mower uses a different hole shape or offset, these won’t fit.

Key Things to Know

• Quality: Made from hardened steel, but may not be as durable as OEM blades; expect to sharpen or replace more frequently under heavy use or rocky soil.
• Installation: Easy to swap with basic tools (socket wrench and blade removal tool). Always disconnect the spark plug (or battery on electric models) first. Torque the blade bolt to manufacturer spec (usually 30–40 ft-lbs).
• Balance: Aftermarket blades can be slightly off-balance. Check balance with a blade balancer before installing to avoid vibration and mower damage.
• Gotcha: These are universal-fit for the listed models, but not guaranteed for other Green Works 21-inch mowers. Double-check your model number against the list to avoid returns.

Should You Buy It

Buy these if you own one of the listed Green Works 21-inch mowers and need a budget-friendly 2-pack for routine blade replacement. They work well for standard grass cutting but may not hold up as long as OEM blades in tough conditions. For occasional residential use, they’re a solid value.