Greenworks 40V 21" Brushless Cordless Review: Who It Fits and Who Should Skip It
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This greenworks 40v 21 brushless cordless review covers the Greenworks 40V 21" Self-Propelled Lawn Mower. It features a 40V brushless motor and a 5.0Ah battery. The mower offers up to 45 minutes of runtime. It cuts a 21-inch swath with a steel deck. The self-propelled rear-wheel drive helps on slopes. You get seven cutting height positions. The unit weighs 21.7 pounds. It includes a battery and charger. This model supports 75+ compatible tools. It is a maintenance-free option for homeowners.
What stands out
- 40V brushless motor for efficient torque and quiet operation
- Up to 45 minutes of runtime with the 5.0Ah battery
- Self-propelled rear-wheel drive for better traction on terrain
- 21-inch durable steel deck for solid durability
- 7-position single-lever height adjustment for versatile cutting
Who it fits
Good fit for
This mower suits homeowners with small to medium lawns under a quarter-acre. The 21-inch cutting width and self-propelled drive make it easy to maneuver. The 45-minute runtime handles typical weekly mowing tasks. If you already own Greenworks 40V tools, the shared battery platform adds value. The steel deck resists impacts better than plastic. The mulching, bagging, and side-discharge options provide flexibility for different yard conditions.
Who should skip it
Skip this model if you have a large lawn exceeding 45 minutes of mowing time. The 21-inch deck is narrow for expansive yards. You may need multiple batteries for larger areas. The self-propelled system adds weight, which might be hard for some users to push uphill if the battery dies. It lacks smart features like app connectivity or GPS. If you prefer a lightweight push mower without engine maintenance concerns but want more power, consider a gas model.
Verdict: This mower delivers reliable performance for small yards with its efficient brushless motor and self-propelled drive. It is a solid choice for users already invested in the Greenworks 40V ecosystem.
Key specs explained for you
Motor Type: Brushless
A brushless motor uses electronic switching instead of physical brushes. This design reduces friction and wear, which extends the tool's lifespan. You get more torque for cutting thick grass. The motor also runs quieter than brushed alternatives. This spec indicates a durable, efficient power source that requires less maintenance over time.
Voltage: 40V
Voltage measures the electrical pressure driving the motor. A 40V system provides higher power output than lower voltage tools. This allows the mower to handle tougher grass conditions without stalling. You benefit from consistent cutting performance across your lawn. When shopping, compare this to 20V models to see the power difference.
Cutting Width: 21 in
This is the width of the grass cut in a single pass. A 21-inch deck covers a moderate area efficiently. You will make fewer passes compared to narrower mowers. This size suits average-sized yards well. Larger decks cover more ground but may be harder to maneuver. Check this spec to estimate your total mowing time.
Drive Type: Self-propelled
Self-propelled means the mower moves forward on its own. You only guide it, reducing physical effort. Rear-wheel drive provides traction on uneven terrain. This feature helps you tackle slopes or thick grass with ease. You save energy and reduce fatigue. Compare this to push mowers if you have a large or hilly yard.
Battery Capacity: 5.0Ah
Amp-hours (Ah) indicate how much energy the battery holds. A 5.0Ah capacity supports up to 45 minutes of runtime. This duration suits medium-sized lawns. Higher Ah ratings generally mean longer use before recharging. You can expect consistent power throughout the cut. Compare this to smaller batteries if you need extended mowing sessions.
Design and Build Quality
The Greenworks 40V 21" mower features a durable steel deck. This material choice supports the 21-inch cutting width and provides structural rigidity. A steel deck resists impact from debris better than plastic alternatives, which helps maintain the deck's shape over time. The listing notes this construction contributes to the mower's overall durability for long-term ownership.
In terms of physical dimensions, the unit measures 21.7 inches in width, 33.1 inches in height, and 65.4 inches in length. The total weight is listed at 21.7 pounds. These figures indicate a compact footprint that fits into standard garages or sheds. The height allows for comfortable standing operation without excessive bending, while the length accommodates the self-propelled rear-wheel drive mechanism.
Controls are simplified for practical use. You adjust the cutting height using a single lever that offers seven positions. This layout lets you change the cut level quickly without stopping to access multiple knobs. The self-propelled drive increases traction on uneven terrain, reducing the physical effort required to push the mower. The finish and assembly follow standard manufacturing practices for this class of tool. According to the listing, the design prioritizes ease of maintenance and straightforward operation for typical residential lawns.
Setup And Daily Operation
Setup begins with assembling the handle to the steel deck. The unit weighs 21.7 pounds, making it manageable for most users to lift into a garage or shed. You insert the included 5.0Ah battery into the designated slot. The system starts instantly, requiring no pull cords or gas mixing. This instant start feature simplifies daily use significantly.
The self-propelled rear-wheel drive provides traction on varied terrain. You do not need to push the mower manually; the motor propels it forward. This reduces physical effort, especially on slopes or in thick grass. The single-lever height adjustment allows you to select from seven cutting positions. This mechanism lets you change the cut height quickly without tools, adapting to seasonal grass growth.
You can choose between three discharge modes: rear bagging, side discharge, or mulching. This 3-in-1 design offers flexibility depending on your lawn care preferences. The 21-inch cutting width covers a standard swath per pass. With the 5.0Ah battery, you get up to 45 minutes of runtime. This duration varies based on grass density and your speed.
Maintenance is minimal due to the electric power source. There is no oil to change or gas to store. The brushless motor requires no brush replacements, extending the tool's life. This mower fits users who want a quiet, emission-free option that integrates with the broader Greenworks 40V ecosystem of over 75 compatible tools.
Before You Buy This Mower
You should check if your existing Greenworks 40V tools share the same battery platform. This mower works with over seventy-five compatible tools in their lineup. If you already own trimmers or blowers from this series, you can use your current 5.0Ah battery. However, verify the voltage matches exactly. The package includes a charger, but confirm your outlet location suits the cord length. Since it is self-propelled with rear-wheel drive, you need flat or gently sloping terrain for best traction. The steel deck requires occasional cleaning to prevent grass buildup. Mulching capabilities mean you may need to adjust your mowing frequency. This model fits well if you want quiet operation and high torque. It suits users who prefer a maintenance-free experience without gas or oil. Compare its runtime against larger battery options if you have extensive lawns. The 21-inch width is ideal for moderate-sized yards.
Check before you buy
- Verify your existing Greenworks 40V batteries are compatible with this mower.
- Check if your yard terrain is suitable for rear-wheel drive traction.
- Confirm you have space to store the 21-inch steel deck mower.
- Ensure your charging outlet is within reach of your mowing area.
The product at a glance
Greenworks 40V 21" Self-Propelled Lawn Mower
Best for: medium lawns needing self-propelled ease
- Power Source
- Cordless battery
- Cutting Width
- 21 in
- Voltage
- 40V
- Drive Type
- Self-propelled
- Battery Capacity
- 5.0Ah
- Runtime
- Up to 45 min
View on Amazon: Greenworks 40V 21" Self-Propelled Lawn Mower Affiliate link
This Greenworks mower uses a 40V brushless motor and a 5.0Ah battery to deliver up to 45 minutes of run-time. The 21-inch steel deck handles medium lawns, while the self-propelled rear-wheel drive assists on uneven terrain. You get seven cutting heights and three discharge options. It starts instantly with no gas or oil. This model suits homeowners who want a quiet, maintenance-free tool for regular upkeep.
Pros
- Brushless motor provides high torque and longer life
- Self-propelled rear-wheel drive improves traction on tough terrain
- 21-inch steel deck offers durability and a wide cut
- Seven-position single-lever height adjustment for versatile cutting
- 3-in-1 capability for bagging, side discharge, or mulching
Cons
- 45-minute runtime may be short for large lawns
- 21.7-pound weight is manageable but not lightweight
- 7-position height adjustment is fewer than some competitors
Good fit if
- You have a medium-sized lawn under half an acre
- You prefer a quiet, emission-free mowing experience
- You want a self-propelled mower for hilly or uneven ground
Skip if
- You need to mow a large property requiring longer run-time
- You prefer a lightweight push mower for easy storage
- You want a wider cutting deck for faster coverage
Verdict: Greenworks 40V 21" Brushless Self-Propelled Mower fits homeowners with medium lawns who value quiet operation and self-propelled ease. It is a solid choice for those seeking a durable steel deck and reliable brushless performance.
Specifications side by side
| Spec | Greenworks 40V 21" Self-Propelled Lawn Mower |
|---|---|
| Power Source | Cordless battery |
| Cutting Width | 21 in |
| Voltage | 40V |
| Drive Type | Self-propelled |
| Battery Capacity | 5.0Ah |
| Runtime | Up to 45 min |
| Deck Material | Steel |
| Cutting Height | 7 positions |
| Mowing Function | 3-in-1 bag/side discharge/mulch |
| Motor Type | Brushless |
| Application | Lawn |
| Included Battery | Battery and Charger Included |
| Dimensions | 65.4 × 21.7 × 33.1 inches |
| Weight | 21.7 pounds |
| Size | 21" Self-Propelled Mower + 5.0Ah Battery |
| Color | Lmf403 |
| Model | LMF414 |
Frequently asked questions
Is the Greenworks 40V 21" self-propelled mower good for medium lawns?
Yes, it is designed for medium-sized lawns. The self-propelled drive reduces physical effort while mowing. You benefit from a 21-inch cutting width that balances coverage with maneuverability. The brushless motor provides consistent power for typical residential yards without excessive strain on the battery.
How long does the 5.0Ah battery last on a single charge?
The included 5.0Ah battery offers up to 45 minutes of runtime. This duration supports continuous mowing for average-sized areas. You can complete typical tasks without needing to swap batteries mid-job. The runtime depends on grass density and cutting height settings.
Does this mower have a steel or plastic deck?
It features a durable steel deck. This material choice enhances structural rigidity and impact resistance. The steel construction helps maintain the deck's shape over time compared to plastic alternatives. It supports the 21-inch cutting width effectively while resisting damage from hidden debris.
What is the weight of the Greenworks 40V 21" mower?
The unit weighs 21.7 pounds. This weight makes it manageable for most users to lift into storage. You can easily maneuver it around obstacles. The self-propelled feature further reduces the effort required to push it, despite its substantial build.
Can I use my existing Greenworks 40V batteries with this mower?
Yes, it works with the Greenworks 40V platform. You can use compatible batteries from other tools in their lineup. This system includes over seventy-five compatible tools. Sharing batteries across your garden equipment simplifies power management and reduces the need for multiple chargers.
Is the motor brushless or brushed?
The mower uses a brushless motor. This design eliminates physical brushes, reducing friction and wear. You gain more torque for cutting thick grass and enjoy a quieter operation. The electronic switching extends the motor's lifespan compared to traditional brushed alternatives.
What are the overall dimensions of this self-propelled mower?
The mower measures 21.7 inches in width, 33.1 inches in height, and 65.4 inches in length. These dimensions fit standard garage storage spaces. The 21-inch cutting width allows for efficient coverage. You can adjust the height to suit different grass conditions.