Ryobi 20 in. 40-Volt Lithium-ion Brushless Cordless Walk-Behind Electric Lawn Mower with 2 Batteries-RY40170 - The Home Depot


Model # RY40170

Internet # 205170763

Store SKU # 1000050414

20 in. 40-Volt Lithium-ion Brushless Cordless Walk-Behind Electric Lawn Mower with 2 Batteries

Ryobi 20 in. 40-Volt Lithium-ion Brushless Cordless Walk-Behind Electric Lawn Mower with 2 Batteries

This item has been discontinued.
The Home Depot no longer carries this specific product.

$399.00 / each


Model # RY40170

Internet # 205170763

Store SKU # 1000050414

Ryobi redefines cordless mowing with the new 20 in. 40-Volt Brushless Mower. This new mower incorporates an innovative, powerful brushless motor with the proven reliability of Ryobi's fade-free Lithium-Ion 40-Volt platform. This new design exemplifies the synergy between performance and convenience. The Ryobi 40-Volt Brushless Mower uses a new 20 in. steel deck with an adjustable height from 1.25 in. to 3.75 in. This kit includes two high-capacity 40-Volt Lithium-ion Batteries to deliver fade-free power and one 90 minute quick charger. This instant-starting, whisper quiet mower is the perfect solution for small yards and close neighbors. All backed by a 3 year warranty, there's never been a better time to consider cordless.

California residents: seeProposition 65 information

  • Powerful brushless motor
  • (2) 40-Volt lithium-ion batteries
  • Quick charger fully charges your battery in 90 minutes
  • 20 in. cutting deck
  • Adjustable height from 1.25 in. to 3.75 in.
  • Extended Warranty: Register your purchase to extend your tool warranty from 3 years to 5 years - see warranty link for more details

Info & Guides

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Assembled Depth (in.)  59 in  Assembled Height (in.)  39 in 
Assembled Width (in.)  21.5 in  Blade Length (In.)  20 
Mower Deck Width  20  Rear wheel size (in.)  10 
Size of Yard  1/2 - 1 Acre 
Amperage (amps)  Charge time (hours)  1.5 
Cordless  Yes  Cutting Options  Bag,Mulch 
Cutting Width  20  Electric Mower Type  Cordless 
Features  Bagger,Battery level indicator,Foldable handle,Mulch Switch,Single-lever height adjustment  Fuel Type  Rechargeable Battery 
Hazardous Code  No Air  Included  Bag Kit,Batteries 
Lawn Mower Type  Walk Behind  Manual Push Mower Type  Electric 
Maximum cutting height (in.)  3.75  Minimum cutting height (in.)  1.25 
Mulching Capability  Yes  Number of Blades 
Number of adjustable handlebar positions  Product Weight (lb.)  44.7 lb 
Reconditioned  No  Returnable  90-Day 
Run time (min.)  45  Start Type  Electric 
Terrain  Flat with Obstacles  Voltage (volts)  40 
Walk Behind Mower Type  Manual Push 
Warranty / Certifications
Certifications and Listings  1-UL Listed  Manufacturer Warranty  3 year warranty - 2 year extended tool warranty with registration 


Rated 4 out of 5 by 32 reviewers.
Rated 5 out of 5 by Excellent Product Used it a few times now, it comes with 2 batteries but I have no problem doing my whole lawn with only one. Very quiet and quite strong. I like the fact that the motor spools up when the grass is thicker and slows down when the load is lighter. Very light and easy to push. It mulch the grass quite well. It's better than I hoped for! August 7, 2014
Rated 5 out of 5 by Great product for our yard I've had my Ryobi 40Volt brushless lawn mower for six weeks now. I read almost every comment on all the lawnmowers before I went ahead with the purchase. I hope my review helps others. I have an average yard in a suburb. Front lawn is probably 400 sq feet, and back yard is probably 800 sq feet. The lawn is quite level. This lawnmower has been one of the best things we have purchased for our yard. The lack of having to gas up our mower or pull out the electric cord is so nice!! Just at a whim I can whip out the lawnmower and do the yard. Pros: It is so easy to start. Very light. Does a fine cutting job. Has about 7 levels for the vertical movement of the blade. One battery will give me almost four complete cuttings before I use the other batter, which is always charged and ready to go. Convenience of battery over anything else. Sound - it is very quiet for a lawnmower, like a loud electric shaver. All in all I am extremely happy with this purchase. As an aside we also purchased a weed trimmer (Ryobi battery powered) and it is the perfect complement to this lawnmower. Hope this review helped others. July 29, 2014
Rated 5 out of 5 by Fun and easy I have to tell you I am a woman and I don't like mowing the lawn. I hate spending minute after minute trying to reef the lawnmower to start it. With Ryobi All i got to do snap in the battery and off i go. It is the easiest lawnmower I've ever used. Super quiet and super fun. Your children will love using it. it comes with two batteries so it's twice the fun if you got a mow a huge area. It's easy fold-down storage makes it a Snap to take anywhere with you. 90 minute charge time makes it easy to charge just go grocery shopping and when you're done bam your ready to mow. I recommend this to the new mower, the young mower, the experienced mower,and senior citizens. Also the mulcher and easy bag removal is a snap to use. If you can charge your cell phone you can use this mower. June 8, 2014
Rated 3 out of 5 by The mower is great, but it's not for a standard size suburban lawn. You'll get 3000 square feet of grass done with the use of both included batteries, so if you are in no hurry to get a larger lot done, go for it, but you will need to fill in your time while waiting 90 minutes apiece for both battery recharges to complete. Impossible to get extra batteries from the store since they are always out of stock, the only ones available are the smaller 1.5 amp hour ones, but what you really need are the 2.4 amp hour batteries that come with the mower, unless you are willing to buy a whole bunch of the small ones and keep swapping them out while working. The parts distributor is a subcontractor and they want 160 dollars for just one unit, and they are on backorder!! Overall, not worth it. There are better battery powered units out there that will do a whole lot more work for less money when factoring in the extra battery costs to do an uninterrupted job. June 29, 2014
Rated 4 out of 5 by Ryobi 20" mower, Not bad at all I have been skeptical of the battery powered lawn tools, but recently dove in head first. So far I am very pleased with the Ryobi line of yard tools. I purchased the 14" 40V chainsaw, the Jet Blower, and now this 20" Brushless Lawn Mower. The mower was very difficult to find. HomeDepot.com as well as many, many local stores did not have this mower. I finally found a Home Depot about 45 miles away that had it in stock, so I took a drive to get it. It is my understanding though, that it will soon be more readily available. The 20" is a great size at only an inch smaller than my gas mower. I felt that the 16" was too much of a sacrifice but I don't even notice a difference with the 20" mower. To start off I would say if you purchase this mower, pay extra attention to the locks on the handle where the handle attaches to the mower. I have included a picture of this. You need to make certain that the handle goes into the slot in the plastic, otherwise your handle will not lock properly. It does take special attention to get it in the slot properly, but once you do, it will lock in place perfectly. I have not tried this mower with the bag attached, but would expect it to last longer than using it as a mulching mower, so I would say performance with the bag on should be A++ because I was pleasantly surprised when mowing with the mulching option. I have nice thick St. Augustine grass and mowed it on the 6th of 7 settings which if Logic is correct would be 3.375 inches. I have a decently sized back & front yard and got all of the back yard as well as all of the side yard and just about 10% of the front yard, all on one battery. I then easily switched out the batteries and finished mowing the front yard and had 3 out of 4 bars left on the battery when finished. Keep in mind this is not documented anywhere I could find, but as I would assume it to be, it would be as follows: Setting 1 = 1.5 inches Setting 2 = 1.875 inches Setting 3 = 2.25 inches Setting 4 = 2.625 inches Setting 5 = 3.00 inches Setting 6 = 3.375 inches Setting 7 = 3.75 inches I assume there are increments of .375 inch in between each setting based on the lowest & highest setting and how many there are in between. I felt that the height setting was of good quality. I know others have mentioned that they thought this was weak. It did not feel this way to me. The parts of the mower that I do feel could have used improvement are the handle that you have to hold down to keep the mower running (This felt cheap to me and I hope it does hold up). The other part was the latch design of the handle to the mower. As I noted earlier in my review, it had to be lined up perfectly to go into the groove and I just wonder how long that will all hold up. I would like to see Ryobi copy Kobalt in having their mower switch between batteries automatically, but on the flip side, I do appreciate knowing how much I got down on one battery because I did have to stop and switch out the battery once it was depleted. Not a major hassle, but I do think Ryobi would be way above the rest if they would incorporate this option into their mower as well. All in all I think this is a great mower. My St. Augustine was not knee length or anything, but I did try to make sure it was long enough to get a good idea of what this mower was capable of, and I was very pleased with both the cut quality as well as the battery life. The mower is quiet enough that you could hold a phone conversation while mowing as well as mow early in the morning without waking any neighbors. With the Ethenol problems on small engines now days (and the thought of the govt increasing the % of Ethenol), these Lithium mowers & yard tools seem like the way to go. Also, be sure to Register your Mower within 30 days of purchase to make sure you get the extra 2 years of Warranty to make it a total of 5 years. July 12, 2014
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