The Greenworks 40V 21 inch electric lawn mower (model LMF413) is a cordless self-propelled battery-powered push mower. It has a 40V 4Ah lithium-ion battery and brushed motor that delivers up to 60 minutes of mowing time per charge.

Key features and specs:

• 21 inch steel deck
• Single lever 6-position height adjustment from 1.25 to 3.75 inches
• 3-in-1 design for mulching, side discharge or rear bagging
• 40V 4.0Ah lithium-ion battery and charger included
• Digital Brushless motor for power and longer battery life
• Variable speed self-propelled rear wheel drive
• Weighs 60 lbs

The Greenworks 21 inch is designed to be easy to use, maneuverable, and provide a quality cut for residential yards up to 1/3 acre. It is part of Greenworks' 40V system so the batteries are interchangeable with other tools.

Design & Build Quality

The Greenworks LMF413 electric lawn mower features a durable steel deck that's rust-resistant and able to stand up to the elements. The cutting deck material is impact-resistant polymer plastic which doesn't dent or bend under normal use.

Assembly is straightforward with no special tools required. The handlebar snaps into place and secures with easy to tighten bolts and wing nuts. Owners mention the mower feels solidly built with quality components that hold up well over time.

The steel deck chassis provides stability and prevents flexing during mowing. The heavy-duty rear wheels and polymer front wheels roll smoothly without wobbling or vibrating at higher speeds. Overall, the build quality matches gas mowers in a similar price range.

Cutting Deck

The Greenworks 40V 21-inch cordless electric lawn mower features a durable steel 21-inch cutting deck. The wide 21-inch cutting path allows you to mow larger areas faster, reducing mowing time.

The cutting height is adjustable between 1.75-3.5 inches in 7 different positions, providing flexibility to adapt the cut for different grass types and conditions. The deck design includes removable mulching and rear bagging options for clipping management.

The mower has a deep 4.5 bushel rear bag for grass clippings, minimizing the need to frequently stop and empty the bag. The rear bag is easy to install and remove for quick transition between mulching and bagging modes.

The steel deck is rugged and designed to withstand frequent use and hold up well over time. The cutting chamber and underside of the deck are optimized for efficient cutting and airflow when mulching clippings.

Overall, the 21-inch cutting deck offers versatility and durability for tackling lawns of various sizes with customized cutting height and clipping collection.

Motor & Battery

The Greenworks LMF413 electric lawn mower is powered by a 21" durable steel deck and 500W brushless motor. The motor provides adequate cutting power and torque to handle thicker grass. Brushless motors provide more torque, run cooler, and have a longer lifespan than brushed motors.

The LMF413 comes with a 2Ah 40V lithium-ion battery. At full charge, the battery can provide up to 45 minutes of continuous runtime. The 40V battery pack ensures you have enough sustained power for mowing most average sized yards on a single charge. The mower also utilizes smart cut technology to maximize battery efficiency.

The 2Ah battery takes about 30 minutes to charge from empty to full capacity with the rapid charger included with the mower. Additional and higher capacity battery packs are available to purchase separately to extend runtime as needed. Overall, the battery capacity should be sufficient for many homeowners with small to medium sized yards.

Handling & Maneuverability

The Greenworks 21-Inch 40V Electric Lawn Mower is designed to be easy to maneuver and handle, thanks to its lightweight and wheel design.

At only 53 pounds, it is significantly lighter than gas-powered mowers which often weigh over 100 pounds. The lightweight build makes it much easier to push the mower around the yard without tiring yourself out.

The 10 inch rear wheels and 7 inch front wheels roll smoothly across most terrain. The wheels have treads to provide traction on slopes and hills. The front wheels pivot for better steering and control.

Overall, users report that the mower is extremely easy to steer and turn. The handlebars adjust to different heights to accommodate users of all sizes. Between the lightweight body and smooth-rolling wheels, the Greenworks mower glides easily around obstacles, under bushes, and along edges for a simple and effortless mowing experience.

Cut Quality & Performance

The Greenworks 40V 21-inch brushless self-propelled lawn mower delivers excellent cut quality and performance for its class. Powered by a 40V 4Ah Li-Ion battery, it has ample cutting power to handle thick and overgrown grass without bogging down. The 21-inch steel deck helps improve airflow and cutting efficiency.

Users say the mower provides an even cut whether tackling thicker patches or finer grass areas. The mower blades are designed to cleanly lift and cut grass for a consistent quality of cut. Even at higher speeds, the mower maintains its cut quality without leaving an uneven choppy cut.

The brushless motor provides constant power and torque enabling the mower to power through thicker grass and weeds without slowing down. The mower has a cutting height range of 1-3/4 inch to 3-3/4 inch to adapt to different grass types and conditions. Overall most users are very satisfied with the cutting power and quality of this electric mower for a standard size lawn.

Noise Level

The Greenworks 40V 21 inch electric mower operates at a quiet 67 decibels, which is comparable to the noise level of a normal conversation. This makes it significantly quieter than a gas mower, which typically generates over 90 decibels of noise. The quieter operation is a major advantage of the Greenworks over traditional gas mowers, making it much more pleasant to operate without requiring hearing protection.

The quieter noise level allows you to mow early in the morning or late evening without disturbing neighbors. It also enables you to carry on a conversation while mowing, without having to raise your voice to be heard over the mower. Parents appreciate being able to monitor kids playing nearby without the mower drowning out other sounds. For anyone seeking a peaceful, tranquil mowing experience without the roar of a gas engine, the Greenworks delivers.

Special Features

The Greenworks 40V 21-Inch cordless electric lawn mower comes with some nice special features that improve the mowing experience.

• LED Headlights: This mower has bright LED headlights built into the front of the deck. The lights turn on automatically when the mower is powered on. This allows you to easily see and mow in low light conditions or at night. The LEDs illuminate the cutting path and help you see obstacles.

• Push Button Start: Starting up the mower is super simple with the integrated push button start. Just press the button and the mower starts right up. No pull cords to wrestle with.

• Dual Port Charger: The charger that comes with this mower has two charging ports. This allows you to charge two Greenworks 40V batteries at the same time, so you can always have one on the mower and one spare fully charged and ready to go.

• Smart Cut Technology: This mower has an advanced digital controller that optimizes the mower's performance to give you the best cut quality and runtime. It monitors things like motor load and grass density, and automatically adjusts power when needed.

• Cut Height Adjustment: The cutting height is adjustable in 1⁄4 inch increments from 1-3/4 inches up to 3-3/4 inches. You can easily set the desired cutting height with a single lever, no tools needed.

• Folding Handle: The handle folds down completely flat for compact storage. This makes the mower take up much less space when storing it in a shed or garage.

Maintenance

The LMF413 requires minimal maintenance to keep it running smoothly for years. Here are the key maintenance tasks:

Cleaning - It's important to clean the mower deck after each use to prevent grass clippings from building up. Remove any accumulated debris with a stiff brush. You can also attach a garden hose to the washout port to rinse out the underside of the deck. Allow the mower to fully dry before storing.

Blade Replacement - The blades should be sharpened or replaced once a year or when they become dull. Replacing the blades is quick and easy with the included blade wrench. Greenworks recommends replacing both blades at the same time to maintain even cutting.

Storage - Proper winter storage will extend the life of your mower. Fully charge the battery, then remove it for storage. Clean all debris from the mower before storing. Store the mower in a dry, covered area like a garden shed or garage. Avoid exposing it to extreme cold or heat. Prior to the next mowing season, fully recharge the battery and do a test run to ensure everything is working properly.

Pros & Cons

Pros

• Powerful 21-inch 40V brushless motor cuts grass cleanly and efficiently
• Large 5.0 Ah battery provides up to 40 minutes of runtime per charge
• 3-in-1 cutting deck handles bagging, mulching, and side discharge
• Adjustable cutting height settings from 1.5-3.75 inches
• Push button start and intuitive controls make it easy to operate
• Foldable handle and lightweight design improve mobility and storage
• Quiet 60dB operation compared to gas mowers

Cons

• Battery and charger sold separately, adding to initial cost
• May require multiple batteries for larger yards
• No electric start button; must be push started
• Plastic wheels prone to cracking over time
• Occasional jams with wet or thick grass
• Bagging attachment sold separately