40V 21" Brushless Self-Propelled Lawn Mower (Tool Only)

In stock
Model
2525102AZ
40V Brushless 21" Self-Propelled Lawn Mower (Tool Only) is rated 4.3 out of 5 by 32.
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Mow the toughest yards with 2x more torque!

  • Deck Size: 21”
  • What's Included: Tool Only - Battery and Charger not included
  • Acreage: Up to 1/3 Acre
  • Power 60+ Tools with any Greenworks 40V Battery
$369.99
In stock
 
2x more torque takes the work out of yard work
Powerfully smart. Tackle the toughest yards, one-handed—because our smart mowers never bog down. When grass gets thick, tall, or wet, Greenworks sensors tell our TRUBRUSHLESSTM motor to rush power to the mower blades. The end result? The perfect lawn, every time.

Powerfully tough. The deck is forged with heavy-duty steel, ready to tackle any terrain. Add in algorithms and a brushless motor to reach unrivaled blade speed. Ka-pow!

Powerfully easy. Simple to start with just the push of a button. Effortless to mow because it’s self-propelled, no sweat! Gentle on the ears because it mows quietly. A cinch to store in small spaces—you can even hang it up if you want to.

Additional features include a 3-in-1 cutting deck lets you choose your cut finish from mulching, bagging or side discharge on the lawn

Zero gas smell. Zero pull cords. Zero maintenance. Zero pollution breathed. Zero time wasted.

Key features
21" Deck Size - Durable steel that plows through the tallest grass
Push Button Start - Press and mow, no more cord yanking
Intelligent TRUBRUSHLESSTM Motor Technology - 2x more torque, more power, longer runtimes, quiet operation, and extended motor life
The Smart Pace™ self-propelled system automatically and smoothly adjusts to your walking speed
Dual battery ports with automatic switch-over for longer, uninterrupted run-times — when one battery depletes, the mower’s power supply is automatically switched to the second battery
Single lever 7 position height adjustment offers a range of cutting height from 1-3/8" to 3-3/4"
EZ Fold™ handles are simple to use - Just pull, fold, and store in seconds – taking up to 70% less space
The convenient 3-in-1 cutting deck lets you choose your cut finish from mulching, bagging or side discharge on the lawn
Battery Powers 60+ 40V Products - One battery to mow, blow, cut, trim, cultivate, and more! (battery not included)
The No List
No Gas Smell. You no longer have to smell like gas after mowing
No Emissions. Save money and breathe clean air
No Maintenance. No tune-ups, no mixing fuels, no messy spills
Low Noise. Easy on the ear, low decibel mowing
Warranty + Service
3 year tool limited warranty
Dedicated Support 1-888-909-6757
Power 60+ Tools with any Greenworks 40V Battery (battery not included)
Power:
Cordless
Voltage:
40V
Ideal For:
Up to ⅓ Acre
Drive System:
Rear-wheel-drive Self-propelled
Brushless Motor:
Yes
SmartCut™ Technology:
Yes
Deck Size:
21 Inches
Discharge Features:
3-in-1
Deck Material:
Steel
Cutting Heights:
7 Position
Max Cutting Height:
3-3/4"
Min Cutting Height:
1-3/8"
Front Wheels:
8 Inches
Rear Wheels:
10 Inches
Tool Warranty:
3 Years
Battery Capacity:
-
  • (1) 40V 21" Brushless Self-Propelled Cordless Lawn Mower
  • (1) Grass Collection Bag
  • (1) Owner's Manual

WALK BEHIND MOWERS FAQ

What maintenance is required for my Greenworks mower?

Greenworks mower units require much less maintenance than a traditional gas unit. However, It will still require routine seasonal maintenance. After each use, we advise you empty the bag (if bagging has been used), then check/clean off debris on the side discharge and rear slot, clean the underside of the deck with a cloth, and wipe the unit down. If there is harder debris stuck to the underside, you may want to use a rubber deck scraper. Make sure to check the unit for loose nuts and bolts after use and secure them if needed. Do not expose this unit to water. Check the blade for any damage/dullness and replace or sharpen as needed. Store the unit in a cool, covered, and dry location such as garage or shed. If you have a battery-operated tool, batteries and chargers should be stored indoors. Please refer to your manual for more guidance on mower/battery maintenance and storage.


When should I cut my grass?

Here are some mowing tips that may be helpful: • Mow when grass is dry. • Mow no more than 1/3 of the length of grass at a time. • Mow in the morning or late afternoon to reduce the heat stress on the newly cut grass. • Alternate mowing patterns each time you mow. As grass develops a grain based on your cutting direction it will lean towards the direction of your mowing path. Changing the pattern allows better vertical growth and helps to keep the cut neater. • Consider mulching. To mulch, remove the bag and insert the mulch plug into the rear of the unit. This will leave the clippings on the lawn allowing the nutrients and nitrogen contained within them to return to the soil and allow the remaining grass to recycle them (always discharge the mulch towards a previously cut area to prevent your mower from bogging down). • Leave grass a little higher in shaded areas. This keeps them healthy in relatively nutrient poor conditions. • Always keep in mind what conditions your variety of grass prefers. If your grass prefers cooler climates, reduce the frequency with which you mow and increase the cutting height of your mower during hot seasons to compensate for the reduced growth rate these varieties may experience in this type of weather.


Do I always need to use my self-propelled feature when operating a self-propelled mower?

No, you don't have to engage the self-propelled feature to operate a self-propelled unit as there are two separate motors. Familiarize yourself with the self-propelled feature and the cutting feature of your unit (instructions are inside the manual). Once you understand these two features, you can engage the blade without using the self-propelled feature.


Can my Greenworks mower cut up pine cones, branches, twigs and other yard debris laying on my lawn?

Greenworks mowers are designed for grass, weeds and foliage. It's not advisable to depend on the mower to mulch any other types of debris. Before operation, please thoroughly inspect the area where the mower is to be used. Remove all stones, sticks, wire, toys, and other objects that could be tripped over or thrown by the blade. Thrown objects can cause serious personal injury.


Can I use my mower in wet conditions such as rain?

For safety reasons (which can be found inside your owner's manual under safety information), we advise not using the mower in wet conditions as unstable footing could cause operators to slip, causing a potential hazard. *The 60V X-RANGE line which features IPX4 weather-resistant construction can be safely used in damp conditions. Be mindful of your footing during use in potentially slippery conditions.*


What does SmartCut™ mean?

The SmartCut™ feature is designed to maximize run time and battery life by automatically detecting the length of grass and adjusting its power or throttle for the optimal cut. With this feature, the rotational speed of the blades will vary. For example, the blades will automatically spin faster when you hit thicker grass.


Does my Greenworks mower unit require gas or oil?

No! Gas and oil are not required to operate our units. Greenworks mowers emit zero emissions and are either battery operated or corded.


Is the battery from my Greenworks mower interchangeable with the other units?

Each voltage line has its own set of interchangeable tools and batteries but are not interchangeable across different voltage lines. For example, 24V batteries are only interchangeable with 24V tools, 40V batteries are only interchangeable with 40V tools, etc. To see compatible tools within each voltage line, select shop by voltage on the Greenworks site or follow the link: https://www.greenworkstools.com/shop-by-voltage If you’re still unsure if your unit is compatible, please contact us at info@greenworkstools.com for further assistance. We’re happy to help!


How do I start my mower unit?

Make sure you are starting the unit in the following order, or it will not start: 1. Push down and hold the safety switch button. While pressing the safety switch button with one hand, use your other hand to simultaneously pull the bale switch towards you. 2. Once the machine turns on, you can let go of the safety button and continue to hold the bale (lever) handle. The unit will only start when the safety button is pressed first, followed by the bale switch. If it is reversed, the unit will not power on. For some of our EZ Fold™ units the start sequence will not affect the unit. Use the correct batteries according to the unit and ensure the batteries have adequate charge. You can either push the button first or pull up the handle—these models are not affected by the start order. For corded units, ensure you have the correct extension cord (reference the owner’s manual) and power from your outlet. If you’re using a battery unit, ensure the battery has a full/adequate charge. However, please always refer to your owner’s manual for verification on the starting process as this would be the most accurate source of information.


Can I use a different Greenworks Amp hour (Ah) battery in my unit?

Yes! For most of our current units, as long as the batteries are from the same Greenworks voltage line (24V batteries with 24V tools, 40V batteries with a 40V tools, etc.), the amp hours (Ah) are interchangeable. Please refer to the below link for our voltage line: https://www.greenworkstools.com/shop-by-voltage If you are unsure if your battery is part of a voltage line that can be interchanged, please contact us at info@greenworkstools.com for further assistance. *Exceptions for our Greenworks 60v 8.0Ah and certain chainsaws in the 80v line.*


What does brushless mean?

A brushless unit has a brushless motor. While conventional motors have carbon brushes which tend to wear over time, brushless motors use magnents instead. This allows the motor to have a longer life, produce less heat, provide more torque, and use less battery. Basically, a brushless motor is a more powerful and efficient upgrade to the traditional brushed motor.


Does battery temperature matter?

Yes! The temperature of the battery should not be too warm or too cold. If the battery is too cold or too warm it may not be operatable—that's why it's important to let your battery reach room temperature prior to use. To avoid battery temperature issues, batteries should be stored indoors in a dry and cool location. More information on battery storage and temperature can be found in inside your owner’s manual.


Why isn’t my mower turning on?

Corded mowers: Make sure you are using the correct size extension cord by following the guide inside the owner’s manual. Check that the extension cord is not loose when inserted into the mower’s plug and ensure a secure connection to a live 120V AC, 60 HZ AC receptacle. Battery operated mowers: Check to ensure the battery capacity has an adequate or full charge, then secure the battery into place. If the battery is loose or can easily be removed, it doesn't have a complete and secure connection. Follow the starting guide located in your owner’s manual for further instruction.


Why does my mower cut grassy unevenly?

Your yard may be too rough or uneven. For a better cut, try moving the cutting height to a higher position when mowing on uneven surfaces.


Why isn’t my mulching working?

First, make sure the mulching plug is inserted into the rear slot at the back of the unit. Next, remove the bag. If too many grass clippings are sticking to the underside of the deck when mowing, the grass is too wet. Wait until the grass dries before mowing again. Also, it's important to keep the underside of the deck clean and clear of debris so that the blade can efficiently cut and mulch.


How do I stop my mower from vibrating?

Slight vibration is normal. However, if you notice an increase or difference in the vibration of the unit during use there may be an issue with the blade or motor shaft. If it’s an issue with the blade, simply replace the worn blade. However, if the motor shaft is damaged or bent you'll need to bring it into a service center. Please contact us at 1-888-909-6757 for further assistance.


Why is my mower hard to push?

Here are some reasons why your unit may be hard to push: • The cutting height is set too low for how tall the grass is—move the cutting height up. • The rear bag is full and is dragging on the ground. Empty the grass bag so it doesn't drag and add weight as you’re mowing. • The underside of the deck is caked with debris. Clean and clear it so the blade can work more effectively. General mower care for best results: • Prior to storage, clean and examine the machine for any damages. • Store the unit in a dry, covered, and cool location like a garage or shed. • Ensure that the unit is stored in a secure location that is not accessible to children or any other persons who should not be operating such machinery.


Can I use my Greenworks mower on hills and slopes?

Yes, though walk behind mower units should not be operated on slopes greater than 15 degrees. This is not a limitation of the unit, but rather to ensure safe footing for the user. When mowing on a hill remember to mow across rather than up and down.

Rated 5 out of 5 by from Very nice mower Runs great. Does a good job. Self propel feature works well. Batteries are WAY over priced. Had to buy off brand battery and it works fine.
Date published: 2022-09-13
Rated 5 out of 5 by from AWESOME MOWER! This 21" mower with batteries cuts my lawn so much better than any professional company and I have tried 3 different lawn companies in the past 6 years. I have had my zoysia grass commercially reel mowed and it was always a problem with 1) their equipment not working properly,2) they could not change the height of the mower cut and 3) it was very expensive. So I decided to do the lawn myself. Did not want to go thru the hassle of using a gas-powered mower. Been there, done that... always ran into problems...difficult to start, have to drain gas at end of season, change oil, etc. I have other Greenworks products (2 blowers, tiller) and have been very pleased with them all. So I decided to look into a battery powered mower. Best decision I have ever made! This mower, mulches beautifully, cuts clean, and is easy to handle and store. I use the self propel only when i am going up the hill, for it will drain the battery quicker if you use it constantly. Take a look at the pics. I am so very happy with my Greenworks mower. Just wish I had made this purchase a few years back!
Date published: 2022-08-01
Rated 5 out of 5 by from Easy to assemble and so easy to my kids can do it I bought this about a month ago and not disappointed at all. It lighter than my old gas one. No fumes or gas smells in garage anymore.
Date published: 2022-06-30
Rated 5 out of 5 by from Fun to use I can mow 2500 Sq ft using one 4ah battery. It's so quiet, the neighbors should be so happy. It's great to have self propelled mowing, I love it. The cut is excellent, just make sure your blades are sharp. My city gave me cash to dismantle my old gas machine. I love it.
Date published: 2022-06-25
Rated 5 out of 5 by from So helpful on hills! Our old lawn mower was not self-propelled, and when we moved to a house with a big hill to mow, it was a real pain. This mower gives enough boost to make going up a relatively steep hill easy as pie. It cuts well and I love that it has an extra slot to hold a charged battery so I don't have to go back inside to switch out half way through the lawn.
Date published: 2022-06-16
Rated 5 out of 5 by from My all-time favorite lawnmower! When my old gas lawnmower finally conked out, I purchased this lawnmower as a replacement. I had never had an electric one, and was more than a little skeptical about how well it would do the job. First, I tried it with the grass catcher on it. It worked fine until I went to empty the grass catcher. It held so much grass that I had to struggle to empty it. (I do not have a lot of strength.) Then I tried it with the side discharge, which worked fine but left me with grass to rake up. Then I tried using it with the mulch feature. Perfect! No grass to rake, no emptying the grass catcher, and no fighting a heavy gas lawnmower! A side benefit for me is that the lawn looks much better and there are now fewer weeds in my yard. This lawnmower glides easily across the yard and the height levels are easy to change. I am totally satisfied with my Greenworks lawnmower, and if something were to happen to it, I would definitely buy another one!
Date published: 2022-06-16
Rated 5 out of 5 by from Easy,cuts great, and best lawnmower I cant tell you how much easier it is to cut my grass with the self propelled lawnmower. This lawnmower does everything for you. All you have to due is steer. I will never change brands our lawnmower. Battery lasts longer then any battery I've ever used. Greenworks keep up great job
Date published: 2022-05-22
Rated 5 out of 5 by from Everything I had hoped for Ready to give up the maintenance on my gas mower. This one has plenty of power, even self-propelled, for my hilly 1/4 acre neighborhood sized lot. Easy-peasy. Recommend to anyone.
Date published: 2021-12-01
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Rated 5 out of 5 by from Very nice mower Runs great. Does a good job. Self propel feature works well. Batteries are WAY over priced. Had to buy off brand battery and it works fine.
Date published: 2022-09-13
Rated 5 out of 5 by from AWESOME MOWER! This 21" mower with batteries cuts my lawn so much better than any professional company and I have tried 3 different lawn companies in the past 6 years. I have had my zoysia grass commercially reel mowed and it was always a problem with 1) their equipment not working properly,2) they could not change the height of the mower cut and 3) it was very expensive. So I decided to do the lawn myself. Did not want to go thru the hassle of using a gas-powered mower. Been there, done that... always ran into problems...difficult to start, have to drain gas at end of season, change oil, etc. I have other Greenworks products (2 blowers, tiller) and have been very pleased with them all. So I decided to look into a battery powered mower. Best decision I have ever made! This mower, mulches beautifully, cuts clean, and is easy to handle and store. I use the self propel only when i am going up the hill, for it will drain the battery quicker if you use it constantly. Take a look at the pics. I am so very happy with my Greenworks mower. Just wish I had made this purchase a few years back!
Date published: 2022-08-01
Rated 5 out of 5 by from Easy to assemble and so easy to my kids can do it I bought this about a month ago and not disappointed at all. It lighter than my old gas one. No fumes or gas smells in garage anymore.
Date published: 2022-06-30
Rated 5 out of 5 by from Fun to use I can mow 2500 Sq ft using one 4ah battery. It's so quiet, the neighbors should be so happy. It's great to have self propelled mowing, I love it. The cut is excellent, just make sure your blades are sharp. My city gave me cash to dismantle my old gas machine. I love it.
Date published: 2022-06-25
Rated 5 out of 5 by from So helpful on hills! Our old lawn mower was not self-propelled, and when we moved to a house with a big hill to mow, it was a real pain. This mower gives enough boost to make going up a relatively steep hill easy as pie. It cuts well and I love that it has an extra slot to hold a charged battery so I don't have to go back inside to switch out half way through the lawn.
Date published: 2022-06-16
Rated 5 out of 5 by from My all-time favorite lawnmower! When my old gas lawnmower finally conked out, I purchased this lawnmower as a replacement. I had never had an electric one, and was more than a little skeptical about how well it would do the job. First, I tried it with the grass catcher on it. It worked fine until I went to empty the grass catcher. It held so much grass that I had to struggle to empty it. (I do not have a lot of strength.) Then I tried it with the side discharge, which worked fine but left me with grass to rake up. Then I tried using it with the mulch feature. Perfect! No grass to rake, no emptying the grass catcher, and no fighting a heavy gas lawnmower! A side benefit for me is that the lawn looks much better and there are now fewer weeds in my yard. This lawnmower glides easily across the yard and the height levels are easy to change. I am totally satisfied with my Greenworks lawnmower, and if something were to happen to it, I would definitely buy another one!
Date published: 2022-06-16
Rated 5 out of 5 by from Easy,cuts great, and best lawnmower I cant tell you how much easier it is to cut my grass with the self propelled lawnmower. This lawnmower does everything for you. All you have to due is steer. I will never change brands our lawnmower. Battery lasts longer then any battery I've ever used. Greenworks keep up great job
Date published: 2022-05-22
Rated 5 out of 5 by from Everything I had hoped for Ready to give up the maintenance on my gas mower. This one has plenty of power, even self-propelled, for my hilly 1/4 acre neighborhood sized lot. Easy-peasy. Recommend to anyone.
Date published: 2021-12-01
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Shipping cost and time?

Asked by: Ross Player
Free shipping on orders over $75. Not applicable to AK & HI or on Riding Mowers. Orders are shipped via FedEx. Most orders are delivered within 5-10 business days. Due to an increase in demand, shipments may be slightly delayed. At Greenworks, we work hard to get orders sent out in an expedited fashion and attempt to process all orders the day they were placed. Therefore, if an order has been accepted and processed, we will no longer be able to cancel the order and it is the customer’s responsibility to follow the return policy and ship the item back to our warehouse. Our team is working night and day to fulfill every order as quickly as possible. We get it, we don’t like to wait either, but we promise our products are worth the wait! For cancellations, please contact us at cancellations@greenworkstools.com There are a few important things to keep in mind when returning a product, you purchased online from Greenworks. You have 30 calendar days to return an item from the date you received it. It is the responsibility of the customer to pay for all shipping costs in returning a product. To view our full return policy, please visit the following link: https://www.greenworkstools.com/return-policy
Answered by: Greenworks Customer Care
Date published: 2022-07-05

I have model: 2525202AZ & I’ve had it for a year with no problems until today. I NEVER use the self propelled feature, but today I went to move the mower & the rear left wheel is locked. I’ve turned the self propelled on & off many times. No change.

Asked by: Chris0577
Hello Chris0577, Thank you for your question. We're very sorry to hear about this issue. Please check that there is no debris or visible obstruction to the wheel of the axle. If issues persist, we would advise contacting us for further assistance at 1-888-909-6757 (1-888-90WORKS). Please have the unit, battery, and charger accessible upon calling.
Answered by: Greenworks Support
Date published: 2022-06-13

I need prices on batteries for a 40V brushless Lawn Mower Model MO40L01.

Asked by: Gail 45
Hello Gail 45, Here is a link to our 40V battery and chargers! https://www.greenworkstools.com/shop-by-tool/accessories?voltage=18 Please know that lawnmowers have a high power draw and deplete smaller batteries quite quickly. For mowers, it is advised to use at least a 4.0Ah battery. For further information, please give us a call at 1-888-909-6757 (1-888-90WORKS).
Answered by: Greenworks Support
Date published: 2022-04-11

What is the weight of this lawnmower?

Asked by: CGH1
Hello CGH1, The weight of this unit is 67.2 lbs. (30.5 kg).
Answered by: Greenworks Support
Date published: 2021-07-06

Is the same as the Greenworks MO40L03 self-propelled, smart pacwd lawnmower listed on Amazon? Buying from Amazon is easier for me.

Asked by: CGH1
Hello CGH1, Yes! This is the same as MO40L03.
Answered by: Greenworks Support
Date published: 2022-06-10

Can the self-propelled be switched off? Also, I see it will work with 40 volt Gmax batteries but does this also mean the automatic switch over from one battery to the next also works?

Asked by: tracyd
Hello tracyd, Yes, you can operate the unit without the self-propelled feature. Do not push the button associated with the propelling feature and the unit will not propel forward. The run time will last longer without the self-propelled option being engaged. Dual battery ports with automatic switch-over provide longer, uninterrupted run-times – when one battery depletes, the mower’s power supply is automatically switched to the second battery.
Answered by: Greenworks Customer Care
Date published: 2022-06-11

I want to use this for just trimming about landscaping and the house, can I use it with the bagger attachment?

Asked by: GenevaDave
Hello GenevaDave, This unit features, a convenient 3-in-1 cutting deck lets you choose your cut finish from mulching, bagging or side discharge.
Answered by: Greenworks Customer Care
Date published: 2021-05-03

When will this item be available or in stock?

Asked by: JasonC
We apologize that this product is not currently available. As there have been many delays given the current pandemic, inventory has unfortunately been affected on some items. We kindly request your continued patience during this time. In the meantime, you may enter your email into the appropriate field on the Lawn Mower's page so that you can be notified as soon as the stock has been replenished.
Answered by: Greenworks Customer Care
Date published: 2021-04-25
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40V 21" Brushless Self-Propelled Lawn Mower (Tool Only)
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