40V HP Brushless 21" Self-Propelled Mower

Model: #RY401140

4.8 | 307 Reviews
  • 40V HP Technology delivers GAS-LIKE POWER™
  • 3-in-1 Mulching, Bagging, and Side Discharge
  • Variable Speed Self-Propelled
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More Power. Longer Runtime. Longer Motor Life.


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All RYOBI batteries are covered by a 3-year warranty.

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Cutting Height
1.5" - 4"
Deck Size
74 lbs.


(2) 40V 6.0 Ah Battery
Deck Height Adjustments
7 Position Single Point
Estimated Runtime
70 mins.
Mowing Function
Bagging, Mulching, or Side Discharge
Recommended Yard Size
Up to 3/4 Acre


5 year tool warranty and 3 year battery warranty



40V HP Brushless 21" Self-Propelled Mower
40V HP Brushless 21" Self-Propelled Mower is rated 4.8 out of 5 by 294.
Rated 5 out of 5 by from Great Lawn Mower Just got this Ryobi 21 in. 40-Volt HP Lithium-Ion Brushless Cordless Walk Behind Self Propelled Lawn Mower with 2 Batteries & Charger. This is a very nice looking and well designed lawn mower. The self propelling feature makes it very helpful to navigate effortlessly especially in the upper side of my lawn. The batteries charge pretty quick and it's great to have 2 of them. It's pretty simple to assemble and it's ready to use right out of the box. I love the fact that it can stand upright taking much less garage space. It's very quiet and very easy to adjust cutting height I am very happy with this machine and would definitely reccomnend it
Date published: 2021-02-27
Rated 5 out of 5 by from Very Powerful! This lawn mower has been very impressive! It came assembled and is easy to operate. The ease of plugging in a battery and avoiding the hassle and maintenance of gas engines is unbelievably convenient, especially since there is no loss of power. I was curious how it would handle heavy patches of grass/brush, and it excels. When it experiences a heavier resistance the rpms increase and get the job done. The self-propeller speed control is also something I like and use often. The battery life has been great, and depending on how often I use the self-propeller the life can be extended. Overall I am extremely happy with this lawn mower and would recommend it to anyone.
Date published: 2021-03-05
Rated 5 out of 5 by from Such a great buy Picked this mower up a few weeks ago in March. Our grass had been a little overgrown due to the crazy snow that came into Texas. I was worried it wasn't going to do the job but the lawn was well over 7 inches in some areas and it did well. The sound is very tolerable as well. I live with a senior who sometimes had a hard time with the loud gas mowers this one has been very good to her ears.. My ONE AND ONLY issue was registering the product for the warranty for some reason it was a hassle and a half. I needed to go through 4 representatives with customer service before I was able to register, even after all that I still don't think my batteries were registered..
Date published: 2021-04-07
Rated 5 out of 5 by from The mower I have been waiting for Ever since we switched to an all-electric car, I've been wanting to do the same with my mower. We have 2/3 acre, with lawns that are sometimes very dense, and several steep slopes, so I have been skeptical of a battery-powered mower to replace my trusty-old Briggs and Stratton! This Ryobi mower has all the power needed, runs quietly, is easy to handle, propels itself smoothly without dragging me around like the heavy old mower did, and I love being rid of the noxious exhaust. It is easy to keep clean, easy to store, and works equally well for mulching, side-discharging, and bagging. This is a home run!
Date published: 2021-04-26
Rated 3 out of 5 by from Gas-like power with a battery We are on our second mower and will soon be using it for the first time. The first came apart at the end of the first use and was returned. Before it lost the blade and all the parts in the cutting deck, it worked great, with really good battery life and gas-like power. It was really scary to hear the bang and realize someone could have been hurt from the horizontal flying pieces. We replaced the original with the same model because hey, it's battery and not gas and it did a good job with good power and battery life.
Date published: 2021-05-01
Rated 3 out of 5 by from Very impressed, but......... I am really impressed with this mower.The assembly was easy, it is easy to start, the height adjustment worked great, and it had plenty of power. It is very light and I was able to cut my yard with one battery that still had one bar lit up when I finished. My only problem with the mower is the self-propelled speed! On the highest setting it is super slow. When I read the reviews, alot of people said that this mower moved very fast on the highest setting, so maybe there is something wrong with mine. Hopefully Ryobi can fix this. If so they will get alot more customers to make the switch. As for me I may take it back and try another one because I really like all of the other features.
Date published: 2021-07-21
Rated 5 out of 5 by from LOVE THI This is my first electric lawn mower. I've used it 3 times and I am very impressed with it so far. It was very easy to assemble right out of the box. I LOVE the fact that it folds down flat and it saves a ton of space. I love that comes with 2 batteries. The unit is very light weight and super easy to use. Running it on the lawn was very similar to vacuuming! I didn't break a sweat when I used this mower, usually I'm quite tired after using my old Honda gas mower. I did a lot of research on mowers and I am glad I got this one.I haven't had any issues. Its nice and powerful for it's size. Great Purchase
Date published: 2021-04-12
Rated 5 out of 5 by from Great product! We received this Ryobi lawnmower a few days ago and were so excited to try it this weekend. We had an older model of Ryobi lawnmower that we’d previously been using and this new model is very much an upgrade. It is just as easy to use at the previous model. The bag attachment collects all of the excess grass and leaves the yard looking clean! The batteries are long lasting and charge quickly. You are also able to change the speed at which it self-propels so you can make sure it’s comfortable for you to use. Overall great product and would definitely recommend to anyone in the market for a new mower!
Date published: 2021-02-28
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