A-iPower

AiPower 21" Self-Propelled RWD Walk Behind Mower with Aero Flow™ Deck

|103 ratings
Item # 990492355
Current price is $399.98
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Columbus, 43215
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Highlights

  • Briggs & Stratton EX550 Gas Engine with ReadyStart® technology 
  • 22” Steel with hardened 21” blade and Aero Flow™ technology
  • 1.85-Bushel wide-mouth opening for quick emptying
  • Comes fully assembled in the box, no assembly required
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4.3125 out of 5 stars
4.3125 out of 5 Stars. 16 reviews
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aipower 21" self-propelled rwd walk behind mower with aero flow™ deck three-quarter front view of black and red Briggs & Stratton–powered mower, 21" steel Aero Flow deck with hardened blade, rear-wheel-drive traction, 12" rear and 8" front wheels, single-lever deck height adjuster and rear collection bag; suitable for compact garage storage.
AiPower 21" Self-Propelled RWD Walk Behind Mower with Aero Flow™ Deck
Hero image 0 of AiPower 21" Self-Propelled RWD Walk Behind Mower with Aero Flow™ Deck, 0 of 14

About this item

Product details

The rear-wheel-drive self-propelled system dominates all lawns. Especially essential for yards with slopes and hills, the LM3N1-SPR-S maintains a consistent cut without any extra effort giving you more control during operation while increasing your safety. The 22” steel deck with Aero Flow™ technology provides superior grass clippings management. Easily adjust the deck height of all four wheels together with a single lever on the side of the deck. You can quickly and easily change the cutting options without tools: rear-bag capture of clippings, mulching, or side discharge. The durable 12” rear and 8” front wheels roll easily over all terrain. The quick-release levers allow the handle to adjust to different heights for customized comfort or fold for compact storage if desired. Experience a superior quality cut with reliable and durable performance from the LM3N1SPR-S mower season after season backed by a 2-Year Warranty.

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Specifications

  • Power: Briggs & Stratton EX550 Gas Engine with ReadyStart® technology
  • Deck: 22” Steel with hardened 21” blade and Aero Flow™ technology
  • Height Adjustment: Single Lever 6-position from 1.25" - 3.75"
  • Drive: RWD Self-propelled drive system
  • Cutting System: 3-in-1 rear bag, mulching, side discharge
  • Wheels: 12" Rear / 8" Front
  • Handle: Ergonomic adjustable height, folds for compact storage
  • Grass Bag: 1.85-Bushel wide-mouth opening for quick emptying
  • Included in box: Mulch kit, side-discharge chute, engine oil
  • Assembly: Comes fully assembled in the box, no assembly required
  • Warranty: 2-Year Warranty on engine and chassis

Member ratings & reviews

3.1 out of 5 stars
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103 ratings77 reviews
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  1. 5 stars39% (40)
  2. 4 stars8% (8)
  3. 3 stars9% (9)
  4. 2 stars11% (11)
  5. 1 star34% (35)
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Showing 1-3 of 77 reviews

Apr 30, 2026
Reviewer name: Ryan
5 out of 5 stars
5 out of 5 stars review

Great mower at a very stong pricepoint!

I really liked this mower. I was in the market and purchased it at Sam's Club because it was there and at a great price. I got it home, and the setup was pretty seamless. The mower has been great. It cuts well and seems very sturdy and well-built. Would definitely recommend to anyone in the market.

Helpful?5OLJNUS7ARVK18893671852
reply from DEE-Ontario Calif.

Hi Ryan, thank you for the awesome review! We’re glad to hear the setup was seamless and that the mower is delivering strong, reliable performance with clean cuts—that’s exactly what we aim for. We appreciate your recommendation and are here if you ever need anything down the line. ~A-iPower Customer Support Team

Jun 10, 2026
Reviewer name: Dmac
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Bucking Bronco Let’s go

Never had a rare powered lawnmower before, but this one has lots of power and it wants to move. It will take down your tall grass and make your mowing time shorter. If you can’t handle it get out of the yard. It’s not for those all seniors because this thing wants to run it cut it mulch it good price compared to all others in its range. Goodbye caught it while it was on sale.

Helpful?5OLJNUS7ARVK18893671852
reply from DEE-Ontario Calif.

Thank you for the great review, Dmac! We're glad to hear the mower is making quick work of your yard and handling tall grass with ease. The combination of strong performance and value is exactly what we designed it for. We appreciate your feedback and thank you for choosing A-iPower! ~A-iPower Customer Support Team

Apr 19, 2026
Reviewer name: Lany
5 out of 5 stars
5 out of 5 stars review

Great power and easy to start and operate

Bought this mower to replace my old one, the difference is literally night and day. The AiPower mower has enough power for all tall grass and weeds, and the self-propelled feature actually walks at a normal, comfortable pace. It is heavy duty and solid. It’s been starting on the first try every time so far. Honestly, totally worth the money.

Helpful?5OLJNUS7ARVK18893671852
reply from DEE-Ontario Calif.

Hi Lany, thank you so much for your awesome review! We’re glad to hear the mower has been such a big upgrade and that you’re enjoying the power, easy starting, and smooth self-propelled performance. It’s great to know it’s handling your grass and weeds with ease—that’s exactly what it’s built for. We truly appreciate your support and are here if you ever need anything. ~A-iPower Customer Support Team

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