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40V HP Brushless Whisper Series 21. in Walk Behind Self-Propelled All Wheel Drive Mower - (2) 6.0 Ah Batteries & Charger

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  • 40V HP technology delivers more power than a 170cc gas mower
  • Ideal for 3/4 acre with up to 70 min. runtime
  • Over 85 RYOBI 40V Products – All Work With Any RYOBI 40V Battery
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Product Details
  • 40V HP technology delivers more power than a 170cc gas mower
  • Ideal for 3/4 acre with up to 70 min. runtime
  • Over 85 RYOBI 40V Products – All Work With Any RYOBI 40V Battery
About This Product

The RYOBI 40V HP 21 in. Whisper Series All Wheel Drive Multi-Blade Lawn Mower delivers the power of gas with cordless convenience. The premium HP brushless motor provides power, longer runtime, & a longer motor life. This mower features all-wheel drive & SMART TREK technology to match the mowers speed to your own pace. It starts with a push of a button & is ideal for yards up to 3/4 acre. Dual active battery ports & (2) 40V 6Ah batteries, get up to 70-minutes of runtime. As part of our WHISPER SERIES family, the mower is among our quietest range of products. RYOBI's CROSS CUT Multi blade System offers 2 blades for superior cutting performance or 1 blade for longer runtime. The integrated mulch plug allows switching from bagging to mulching by pulling a lever. The on-board fuel gauge shows the battery life, making it easy to check. The 21 in. deck is lightweight, resists corrosion, & is covered by a limited lifetime warranty. The mower has an 11 in. high wheel & the deck features 7-position single point height adjustment to select grass height between 1-4 in. With the 3-in-1 mowing functions, choose between bagging, mulching, & side discharge functions. Easy lift bag removal allows you to quickly empty the grass bag. The 1-Touch aluminum handles fold for compact, vertical storage. The kit includes a 40V rapid charger to charge your batteries 4X faster than the standard charger. The mower is proudly made in the USA with global materials & is backed by a 5-year Tool Warranty.

  • High performance brushless motor delivers maximum performance and the performance of gas
  • Whisper series - our quietest range of products
  • Push button for hassle free starting
  • SMART TREK adaptive variable speed with all-wheel drive
  • Up to 70-minutes of runtime, ideal for up to 3/4 acre
  • Dual active battery ports
  • Cross cut multi blade system for superior cutting performance
  • Integrated mulch plug
  • 21 in. durable composite deck is lightweight and resists corrosion
  • Deck is covered by a limited lifetime warranty
  • 7-position, single-point height adjustment from 1 in. to 4 in.
  • 3-in-1 mowing functions, mulching, bagging and side discharge
  • Easy lift bag removal
  • 1-touch aluminum folding handles for compact, vertical storage
  • External fuel gauge shows runtime remaining
  • High-intensity LED headlights
  • Includes (2) RYOBI 40-Volt 6 Ah batteries and a rapid charger for 4X faster charging
  • Works with all RYOBI 40-Volt lithium batteries
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents
     see Prop 65 WARNINGS
Product ID #: 317845502Internet #: 046396040244Model #: RY401210
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Specifications

Dimensions: H 42 in, W 23 in, D 57 in

Dimensions

Assembled Depth (in.)57 inAssembled Height (in.)42 in
Assembled Width (in.)23 inBlade Length (in.)21 in
Cutting Width (in.)21 inchesFront Wheel Size (in.)8
Mower Deck Width (in.)23 inRear Wheel Height (in.)High Wheel
Rear Wheel Size (in.)11

Details

Assembly RequiredYesBattery Amp Hours6 Ah
Battery Run Time (min.)70Battery TypeLithium Ion
Battery Voltage (V)40VBattery/Charger(2) 6 Ah Batteries & Charger Included
Charge Time (hours)1Charger IncludedCharger Included
Cutting Height Options7-positionCutting OptionsBag, Mulch, Side-Discharge
Deck MaterialPolymer CompositeDeck TypeFabricated
Drive Type4 Wheel DriveEngine Torque (ft.-lb.)0
FeaturesAdjustable Cutting Height, Adjustable Handlebar, Adjustable Speed, Assembly Required, Bagger, Battery level indicator, Brushless Motor, Foldable handle, Headlights, Mulch Switch, Mulching Lawn Mower, No Oil Change Required, Residential, Rust Resistant, Single-lever height adjustmentIncludedBagger, Battery(s), Charger, Wheels
Lawn Mower TypeSelf-Propelled Lawn MowerMaximum Cutting Height (in.)4 in
Minimum Cutting Height (in.)1 inMower Size TypeStandard
Number of Batteries Required1Number of Blades2
Number of Handlebar Positions2Number of Total Batteries Included2
Power TypeBatteryProduct Weight (lb.)78 lb
Recommended TerrainFlat, Sloped, UnevenRefurbishedNo
Returnable90-DaySize of Yard1/2 - 1 Acre
Start TypePush Button StartTools IncludedBattery, Charger, Mower
Walk Behind Mower TypeSelf Propelled

Warranty / Certifications

Certifications and ListingsUL CertifiedManufacturer Warranty5 Year Mower, 3 Year Battery
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Questions & Answers

119Questions
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Q:First time using worked for 15 minutes and now won't start. Checked batteries, key, underside, handle bars etc. Motor tries to turn over but won't start. Ideas??
by|Dec 23, 2023
1 Answer
Answer This Question

A:  Hello, Fach - Thank you for your question. I am sorry to hear that your mower is having issues. So we can better assist you, please reach out to us directly. I hope this helps! Additionally, if you need further support, then a RYOBI Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.800.525.2579 or through email when you visit us at https://www.ryobitools.com/support/contact. And thank you again for your interest in the 40V HP Brushless Whisper Series 21. in Walk Behind Self-Propelled All Wheel Drive Mower - (2) 6.0 Ah Batteries & Charger. - Emily

by|Dec 28, 2023
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    Q:Is this lawn mower powerful enough to cut thick St. Augustine grass?
    by|Oct 5, 2023
    1 Answer
    Answer This Question

    A:  Hello, Pops109 - Thank you for your question. Yes, you'll just see a decreased runtime due to the thickness of the grass. I hope this helps! Additionally, if you need further support, then a RYOBI Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.800.525.2579 or through email or live chat when you visit us at https://www.ryobitools.com/support/contact. And thank you again for your interest in the 40V HP Brushless Whisper Series 21. in Walk Behind Self-Propelled All Wheel Drive Mower - (2) 6.0 Ah Batteries & Charger. - Jesse

    by|Oct 7, 2023
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      Q:The sliding mulching door is a terrible design and always leaves a 1/4 gap despite track being completely cleaned and the lever locked in mulch position. Can a mulch plug be used on this model instead: Ryobi replacement mulching plug part number 52755
      by|Oct 1, 2023
      1 Answer
      Answer This Question

      A:  Hello, Rvci - Thank you for your question. Yes, the mower can be used for mulching if you install the mulching plug. I hope this helps! Additionally, if you need further support, then a RYOBI Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.800.525.2579 or through email or live chat when you visit us at https://www.ryobitools.com/support/contact. And thank you again for your interest in the 40V HP Brushless Whisper Series 21. in Walk Behind Self-Propelled All Wheel Drive Mower - (2) 6.0 Ah Batteries & Charger. - Jewel

      by|Oct 3, 2023
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        Q:Can this use Ryobi 4.0 batteries?
        by|Sep 19, 2023
        1 Answer
        Answer This Question

        A:  Hello, Johng - Thank you for your question. If the batteries you are referring to are 40v then, yes. I hope this helps! Additionally, if you need further support, then a RYOBI Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.800.525.2579 or through email or live chat when you visit us at https://www.ryobitools.com/support/contact. And thank you again for your interest in the 40V HP Brushless Whisper Series 21. in Walk Behind Self-Propelled All Wheel Drive Mower - (2) 6.0 Ah Batteries & Charger. - Jewel

        by|Sep 22, 2023
          Showing 1-4 of 119
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          Customer Reviews

          4.5 out of 5
          • 4.5 out of 762 reviews
          • 88% recommend this product
          Filter by:
          Showing 1-10 of 762 reviews
          Great power.
          [This review was collected as part of a promotion.] This mower has power and can mow my .33 acre yard and one full battery charge.
          by
            Better than my old gas mower
            [This review was collected as part of a promotion.] Bought the AWD 21" a couple of months ago like it better than I thought I would. It is replacing a 21" Snapper Hi Vac and does everything better except sucking pine needles up like the Snapper. Maybe Ryobi will come out with a blade with more uplift. Things I like: powerful with automatic or manual power increase, mulches better, clean cut, much quieter, folds up in seconds for storage, two batteries, push button start, made in USA, no mulch plug, one handle adjusts all wheels, AWD for going up my hill, the variable and adjustable speed control. I recently bought the blower tool only and am going to get the 12" trimmer later. When Ryobi comes out with the 12AH battery I am going to get that and use one of the 6AH for the blower and trimmer. One 6AH will almost cut my 1/3-acre yard so with the 12AH battery I will not have to switch key. Time will tell how it lasts but it looks like to me it is well made. I wish they had more repair choices in St. Louis area. Closest one is about 50 miles away! I am a retired mechanic so maybe if something goes wrong they could send me the part, looks easy to work on. I won't miss all the oil, gas, belts, filters, bearings and cable replacement!
            by
              • Recommended
              love my lawn mower!
              [This review was collected as part of a promotion.] The lawn mower was easy to put together ❤️. It worked beautifully, I love my new lawn mower.
              by
                • Recommended
                Better than gas mower
                I am impressed with this mower! Replaced a Snapper 21". Things that are better: powerful, mulches better, quiet, push start, folds up in seconds, battery charge in less than an hour, side shout installs in seconds, variable speed paddle on handle, AWD for hills, one handle for adjusting all wheels all at once, no mulch plug. Most of all no gas and maintenance! The only thing not as good is sucking leaves up compared to the Snapper Hi Vac. I will upgrade to the 10AH and use 6AH for blower.
                by
                  • Recommended
                  Ran good until......
                  Lasted a bit over a month. Good Mower, battery not good.1st mow, no problem, 1 batt did the job. 2nd mow, the 2nd battery had to kick in thankfully comes with 2 batteries. After 2 more mows, one battery showed an error message, a day later off the charger, the battery catches on fire! Luckily I was home, took action and avoided my house burning down. Tried calling Ryobi - over 2 hours on hold, can't reach anyone. The faster text 1-800-525-2579 - a joke..just as bad! Email, HA! Returning junk!
                  by
                  Response from RYOBIOct 11, 2023
                  Hello, HomeDepotCustomer - Please email us at Reviews@RYOBItools.com. We'd like to discuss your feedback further. RYOBIOutdoorTools
                    4 found this review helpful
                    More than I expected.
                    [This review was collected as part of a promotion.] I have never really imagined that I’d buy an electric mower due to the suspicion that in so doing I’d sacrifice power. To that effect I can’t say that I have, although my lawn is small and the grass is short. This mower features the ability to self adjust power based on demand. And the drive function works smoothly. I enjoy being able to easily tuck it away. All in all, a great buy.
                    by
                      • Recommended
                      A Keeper!
                      [This review was collected as part of a promotion.] In late May 2023, I decided to try electric with regards to lawn care equipment over gas and gas /oil mix fuel. The mower has been in service for three months now, so I feel that's adequate time to fairly review this item. I find this mower as very acceptable for its primary task, mowing my lawn. It's quiet enough to have a conversation with the neighbor as I mow. The cut is even and the clippings are fairly small. It has no issues with some uneven terrain. The mow time for my lawn (5K sq. ft.) using the rear drive is at least equal to my gas mower. The drive takes some getting use to as it's on or off, whereas the belt drive on the gas mower can slip for you. The forward lighting feature is adequate for late evening mowing. I have not needed the AWD feature as yet. I have not encountered any blade / deck conflicts. One 6ahh battery completes the mowing task for me with one charge indicator led left for the blower and clean up. Nice to be able to fold the handle and store the mower on end saving floor space in small shed. Drawbacks IMO.... For the Mulch / Bag gate, the guide tracks (top and bottom) tend to load up making it difficult to close off the rear discharge. I use a length of aluminum guy wire to clean them out. PICTURES The plastic caps for the handle rails have about a half inch 90° that can get caught on my fence and bring things to an unexpected abrupt halt. PICTURE A little concerned with its ability to pick up leaves without needing to scalp the lawn. Fall is coming for that test. Overall, I'm happy with it. So, it's a keeper!
                      by
                        • Recommended
                        Great features (4WD)
                        [This review was collected as part of a promotion.] After a month I couldn't be happier. Light weight and battery lasts 3/4 acre with some charge still left.
                        by
                          • Recommended
                          Not exactly what you want
                          Ok so I bought this as a replacement for a gas mower. In my case, not a good idea. This mower does ok if you have a ‘manicured’ lawn. Not so good if you don’t. Not only that but the batteries a total of 3, are only lasting about 45 minutes all together. If you have crabgrass and chicken foot grass you’ll have to mow over it 2-3 times to cut it. if your grass is more than a couple of inches tall, you will have to clean the exit shoot every couple of feet. pictures are with the cut set at 3
                          by
                            • Recommended
                            1 found this review helpful
                            Could Have Killed Someone
                            We bought this two summers ago. The first few months it worked fine. This year, it began to work poorly, batteries didn’t last as long as they once did, and it became more difficult to cut even moderately thick grass. Then it caught fire and started smoking while in use. We have a normal lawn, store everything appropriately, and use it as anyone else does. Thank god a battery didn’t explode or anything. As you can see in the pic, a large hole melted in the mower. No service center in our town.
                            by
                            Response from RYOBIAug 10, 2023
                            Hello, HomeDepotCustomer - Please email us at Reviews@RYOBItools.com. We'd like to discuss your feedback further. RYOBIOutdoorTools
                              8 found this review helpful
                              Showing 1-10 of 762 reviews

                              40V HP Brushless Whisper Series 21. in Walk Behind Self-Propelled All Wheel Drive Mower - (2) 6.0 Ah Batteries & Charger

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                              Cutting Width (in.)

                              21 inches

                              21 inches

                              21 inches

                              21 inches

                              Size of Yard

                              1/2 - 1 Acre

                              1/2 - 1 Acre

                              1/2 - 1 Acre

                              1/2 - 1 Acre

                              Features

                              Adjustable Cutting Height, Adjustable Handlebar, Adjustable Speed, Assembly Required, Bagger, Battery level indicator, Brushless Motor, Foldable handle, Headlights, Mulch Switch, Mulching Lawn Mower, No Oil Change Required, Residential, Rust Resistant, Single-lever height adjustment

                              Adjustable Cutting Height, Adjustable Speed, Brushless Motor

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                              Battery Voltage (V)

                              40V

                              18V

                              18V

                              18V

                              Charger Included

                              Charger Included

                              Charger Included

                              Charger Included

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