Greenworks 21″ 40V Brushless Self-Propelled Lawn Mower – Cordless Power & Precision

The cordless brushless lawn mower revolutionizes yard care with the Greenworks LMF403, delivering up to 45 minutes of run‑time on a single 5.0Ah battery charge. Built for efficiency and ease, this self‑propelled mower grips rear wheels to match your stride and tackle large lawns without fatigue. Its 21‑inch steel deck and brushless motor combine torque, quiet operation, and longevity to create a robust mowing solution—no cords, no fumes, and no compromises.

Whether you’re managing a sprawling backyard or a modest suburban lot, the Greenworks 40V mower adapts to your needs. Dual battery ports allow seamless automatic switchover, so you never stop mid‑cut. A 7‑position single‑lever height adjustment and 3‑in‑1 cutting system—mulch, bag, or side discharge—offer precise control over grass management. Plus, its vertical storage feature saves up to 70% of garage space, making post‑season cleanup a breeze.

Why Choose a Cordless Brushless Mower?

Modern homeowners demand performance without the drawbacks of gas engines. A 40V brushless mower offers:

• 🌱 Zero Emissions: Eco‑friendly operation with quiet, vibration‑reduced mowing.
• ⚡ Consistent Power: Brushless motor technology maintains torque under load for smooth cutting.
• 🔋 Dual Battery Ports: Swap batteries on the fly and cut continuously without returning to the garage.
• 🔧 Low Maintenance: No spark plugs, oil changes, or fuel mixing required.

Key Features & Benefits

• 45-Minute Run‑Time: Up to 45 minutes per 5.0Ah battery (varies with grass conditions).
• 21″ Steel Deck: Durable cutting area for fast coverage of large lawns.
• Self-Propelled Rear-Wheel Drive: Adjusts to your pace for comfortable mowing.
• 3‑in‑1 Cutting System: Mulch, bag, or side discharge grass clippings.
• 7-Position Height Adjustment: Single‑lever changes from 1.5″ to 4″ for precise cutting height.
• Vertical Storage: Fold handle and stand mower on end to save up to 70% garage space.
• 4-Year Tool & 2-Year Battery Warranty: Industry‑leading coverage for peace of mind.

Technical Specifications

Maximizing Your Mower’s Performance

• ✅ Charge Fully: Ensure batteries are fully charged before mowing for maximum run‑time.
• ✅ Alternate Batteries: Use dual ports to swap batteries and double productivity without downtime.
• ✅ Mulch for Healthier Lawn: Mulching returns nutrients to the soil—use during growing season.
• ✅ Adjust Height Weekly: Change cutting height with the seasons to maintain optimal grass health.

People Also Ask

How long does the battery really last?

Run‑time varies by grass type, density, and terrain but averages 45 minutes on a fully charged 5.0Ah battery under moderate load.

Can I mow on slopes?

Yes, but for safety, use caution on hills over 15°; self‑propelled drive assists but always mow across, not up and down steep slopes.

Is it noisy?

Brushless motors operate quietly—around 70 dB—making it significantly quieter than gas mowers, perfect for early morning or late evening mowing.

Maintenance & Care Tips

• 🔧 Clean Deck: After each use, clear clippings and debris to prevent corrosion.
• 🔧 Inspect Blades: Sharpen or replace every season for clean cuts and reduced stress on the motor.
• 🔧 Store Vertically: Use the space‑saving feature to stand the mower and protect the deck.

Why Greenworks G-MAX 40V?

Greenworks’ 40V platform powers over 25 tools—from blowers to chainsaws—on the same battery ecosystem. You invest once and swap batteries across tools, saving money and space while reducing emissions and maintenance.

The Greenworks 21″ 40V brushless self-propelled mower embodies convenience, power, and eco‑friendly design. Free yourself from cords and gasoline without sacrificing performance. Whether you own a large yard or just a tidy lawn, this mower delivers professional‑quality results with the push of a button.

Ready to transform your mowing routine? Click “Add to Cart” and experience the cordless revolution today! 🚀