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Internet # 327711060

Model # 12A-O1T9739

Store SKU # 1010599162

21 in. 150cc Briggs and Stratton 625ex Engine Rear Wheel Drive 2-in-1 Gas Self Propelled Walk Behind Lawn Mower

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  • 21" Rear Wheel Drive Self Propelled Lawn Mower Ideal for 1/2 Acre
  • 150cc Briggs & Stratton Engine with ReadyStart Easy Start System
  • Includes Gas Lawn Mower, Engine Oil, Bagger and Mulch Kit
  • View More Details

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Product Details

About This Product

Manage your lawn with the DEWALT 21 in. rear wheel drive, gas mower. Delivering strength and power to your yard with a 150cc Briggs & Stratton engine. This durable steel deck mower provides 2-in-1 mulching and bagging capability utilizing a 2.3 bushel bagger. Easily adjust the grass height settings to your preference with just two levers and cut heights ranging from of 1.25 in. -3.75 in. Take on uneven areas of grass with 8 in. wheels and single lever, rear wheel drive.

Highlights

  • Shop Compatible Replacement Parts Here
  • 150cc briggs and stratton ready start engine with simple no prime, no choke starting
  • Rear wheel drive with variable speed transmission provides more control and traction on hills or when bagging
  • Large 2.3 bushel rear bag collects more clippings for easy clean up or composting
  • Included mulch kit helps maintain a healthy lawn
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 327711060

Model # 12A-O1T9739

Store SKU # 1010599162

Specifications

Dimensions

Cutting Width (in.)

21 inches

Mower Deck Width (in.)

21 in

Details

Cutting Height Options

6-position

Cutting Options

Bag, Mulch

Deck Material

15 Gauge Steel

Drive Type

Rear-wheel Drive

Engine Displacement (cc)

150

Engine Make

Briggs and Stratton Engine

Features

Adjustable Cutting Height, Assembly Required, Bagger, Mulching Lawn Mower, Residential, Variable Speed

Fuel Tank Capacity (gal.)

.25 gal

Included

Bagger, Engine oil

Lawn Mower Type

Self-Propelled Lawn Mower

Maximum Cutting Height (in.)

3.75 in

Minimum Cutting Height (in.)

1.25 in

Mower Size Type

Standard

Number of Blades

1

Power Type

Gas

Recommended Terrain

Flat, Sloped

Returnable

30-Day

Size of Yard

1/4 - 1/2 Acre

Start Type

Pull Cord

Walk Behind Mower Type

Self Propelled

Warranty / Certifications

Manufacturer Warranty

3-Year Limited Warranty

Questions & Answers

What spark plug does this use?
ByAug 11, 2026
0 Answer | 
Answer This Question

What oil do I use
ByAug 10, 2026
0 Answer | 
Answer This Question

I buy 1.5 year before lawnmower and it’s stop working what I need to do
ByAug 6, 2026
1 Answer | 
Answer This Question

Hello Rajsingh! It would need to be looked at by one of our authorized service centers! You can give us a call at 1-855-971-2271 to find the closest location. Thank you for your question.

By|Aug 7, 2026


    Is it normal for the left rear wheel to not spin freely? I have to lift up the left side to maneuver it when the engine is off for pulling it backwards.
    ByAug 6, 2026
    1 Answer | 
    Answer This Question

    Hi Firebird1988. We want to help, but we will need additional information first. Contact us directly at 1 (877) 428-2349. Mention your case number 11018215 so we can help. It will be best to have your 11-digit model and serial numbers available. This information can be found on the white tag, either on the rear door or rear left of the deck. Thank you for your question.

    By|Aug 6, 2026


      leaves an ineven stripip
      ByJul 18, 2026
      1 Answer | 
      Answer This Question

      Hello dave. One of the reasons that you could be getting an uneven strip is that the deck height on the mower is uneven. Make sure that all the deck height levers are locked into the exact same notch. Another reason is that your blade is either damaged, dull or might even be upside down. Make sure the "wings" or curved tips must point up toward the deck and not down toward the grass. Also check to make sure that there are no built-up grass clippings underneath the deck that could be disrupting the aerodynamic lift needed for a clean cut. Lastly, slow down your walking pace and make sure you are overlapping your previous pass by at least 2 to 3 inches. Thank you for your question.

      By|Jul 20, 2026


        Does this self propelled mower free wheel in reverse when propelled lever is disingauged?
        ByJul 14, 2026
        1 Answer | 
        Answer This Question

        We’re sorry to hear you haven’t been satisfied with your DeWalt equipment. We do take our customers’ opinions very seriously, and the feedback we receive helps us build better products. Please contact us at 1-855-971-1123. Thank you.

        By|Jul 18, 2026


          How is the bag held on?
          ByJul 10, 2026
          1 Answer | 
          Answer This Question

          Hello Katherine. The rear bag hooks onto the long hinge pin that goes through the top of the rear door. You need to lift the door first and it's then that you can hook the bag onto the hinge pin. If you have any other questions, please feel free to call us at 1-855-971-2271 to speak to an agent. You can also visit us on the genuinefactoryparts.com website. Thank you for your question.

          By|Jul 14, 2026


            Is there a side grass shoot for DW2in1walk mower
            ByJul 5, 2026
            1 Answer | 
            Answer This Question

            Hello. This 21 in. 150cc Briggs and Stratton 625ex Engine Rear Wheel Drive 2-in-1 Gas Self Propelled Walk Behind Lawn Mower was designed for mulching and bagging. There is no side discharge chute, for that very reason. Thank you for your question.

            By|Jul 9, 2026


              Viewing 1-8 of 215

              Customer Reviews

              3.8 out of 5

              • 3.8 out of 1,518 reviews
              • 31% recommend this product
              Filter by:
              Showing 1-10 of 1,518 reviews
              Beautiful but came not starting
              Bought brand new July 9th not starting off island therefore it will cost me to have it repaired disappointed
              by
              Response from DewaltProductExpertAug 5, 2026
              We’re sorry to hear you haven’t been satisfied with your DeWalt equipment. We do take our customers’ opinions very seriously, and the feedback we receive helps us build better products. Please contact us at 1-855-971-1123. Thank you.
                Keep turning off
                I brought it today I put the right gas in it & the bottle of oil the gave me I started it up & it ran but it couldn’t go to it full power at all & it keep shutting off so I’m return it tomorrow
                by
                Response from DewaltProductExpertJul 28, 2026
                We’re sorry to hear you haven’t been satisfied with your DeWalt equipment. We do take our customers’ opinions very seriously, and the feedback we receive helps us build better products. Please contact us at 1-855-971-1123. Thank you.
                  2 found this review helpful
                  Cuts like butter gliding across a hot griddle. ?
                  by
                  1 found this review helpful
                  This would have gotten a better rating had not after three uses the paint on The Underneath where the blade is has started peeling off. I wash off the mower top and Underside after mowing and now a good third of the paint from underneath is gone.
                  by
                  Response from DewaltProductExpertJul 8, 2026
                  We’re sorry to hear you haven’t been satisfied with your DeWalt equipment. We do take our customers’ opinions very seriously, and the feedback we receive helps us build better products. Please contact us at 1-855-971-1123. Thank you.
                  3 found this review helpful
                  Starter cable broke within 10 minutes
                  Terrible. The BRAND NEW starter drive cable (that one squeezes to start the mower or to operate it) snapped within 10 minutes of using it for the first time. I mowed roughly 30 feet and heard a snap, then the engine stopped. I returned it. $400 hunk of junk.
                  by
                  Response from DewaltProductExpertJul 10, 2026
                  We’re sorry to hear you haven’t been satisfied with your DeWalt equipment. We do take our customers’ opinions very seriously, and the feedback we receive helps us build better products. Please contact us at 1-855-971-1123. Thank you.
                    2 found this review helpful
                    Never again don’t be fooled
                    Blew up after 9 cuts and three months of use will take 6-9 weeks for the manufacturer to take a look at and fix or replace NEVER AGAIN buy a Honda
                    by
                    Response from DewaltProductExpertJul 6, 2026
                    We’re sorry to hear you haven’t been satisfied with your DeWalt equipment. We do take our customers’ opinions very seriously, and the feedback we receive helps us build better products. Please contact us at 1-855-971-1123. Thank you.
                      3 found this review helpful
                      The delivery man carried the box by holding it tightly at his chest. Hobbling to my garage door, he drops it from a hight approximately 3-3.5 feet. The mower had to be repaired before I could use it. I don't know if this is normal but there's a clicking/raddeling sound coming from the motor.
                      by
                      • Verified Purchase
                      2 found this review helpful
                      Disappointed, wish I had read the reviews more in-depth first
                      Just bought and regret it. The very first mow, not even 10 minutes in, the plastic ground flap behind the rear axle came loose and was just flopping. When the bag got too full - I guess, it really wasn't that full - it slipped off and caused me to trip, nearly on top of the deck. The speed of the self propel is too fast at full deflection and seemingly won't adjust. The bag is so big that it barely fits into the lawn recycle bags, spilling multiple times. There are some pluses. The cut is pretty even and the Briggs & Stratton engine starts up easily, but overall not happy at all with this purchase and unfortunately it's not returnable.
                      by
                      Response from DewaltProductExpertJun 24, 2026
                      We're sorry to hear about the issues you are experiencing with your Mower. We recommend contacting one of our Authorized Service Centers here: https://www.mtdparts.com/en_US/servicelocator. They handle all of our warranty claims and adjustments and can work directly with our customer support to fix the problem. If you have any questions, contact us directly at 1-855-971-1123 so we can help. Thank you for rating our product.
                        3 found this review helpful
                        CRAP
                        It’s great for a couple of months until one morning you go out and it won’t start, even with all recommended troubleshooting. No prime makes it MUCH MUCH WORSE.
                        by
                        Response from DewaltProductExpertJun 17, 2026
                        Hello, NOYB. Thank you for taking the time to provide your feedback. I am sorry that you had a negative experience with 21 in. 150cc Briggs and Stratton 625ex Engine Rear Wheel Drive 2-in-1 Gas Self-Propelled Walk Behind Lawn Mower 12A-O1T9739. I would like to assist you with getting in contact with our Customer Service Team that manages this product. Please send an email to WECARE@sbdinc.com and reference ticket 15594686 so we may have all the information available from your review. We may require additional information before we are able to forward your case to the appropriate customer service team for this product. Thanks, Andy DeWalt.
                          4 found this review helpful
                          Good features for the price
                          I bought this a few days ago so take my review with a grain of salt. It was easy to assemble, started on the first pull and I proceeded to mow a 1/2 acre lawn. Only issue was when changing bags and trying to restart the mower flooded requiring sitting for an hour. Then once again started on first pull. It seems to cut well and the rear drive system worked really well. The no choke or prime system seems odd and may be why it needs to cool off after running for a while. Anyway after mowing 1/2 acre lawn one time it seems to be worth the price I paid. I used the bag and mulching setup and both seemed to work as designed. Height adjustment was easy and the machine cut fairly dense grass well. We will see how it holds up over time but so far so good.
                          by
                            • Recommended
                            2 found this review helpful
                            Showing 1-10 of 1,518 reviews

                            Compare Key Features

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                            Product Snapshot

                            Ideal for customers who want powerful mulching and bagging, ensuring a healthy, clean lawn.
                            Ideal for homeowners wanting variable speed, mulching, and RWD for efficient lawn care.
                            Ideal for homeowners wanting variable speed and mulching, ensuring efficient lawn care.
                            Ideal for homeowners wanting a powerful 21 in. mower with mulching and self-propelled RWD.

                            Cutting Width

                            21 in.
                            21 in.
                            21 in.
                            21 in.

                            Engine Power

                            150 cc
                            190 cc
                            190 cc
                            190 cc

                            Variable Speed Control

                            Mulching Capability

                            Rear-Wheel Drive