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PowerSmart 21 in. 125cc Briggs & Stratton Push Gas Lawn Mower b8721c

PowerSmart 21 in. 125cc Briggs & Stratton Push Gas Lawn Mower b8721c

3.6· 112 ratings

Best price now

$329.99at Best BuyObserved at 1:33 AM

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Our take on the PowerSmart 21 in. 125cc Briggs & Stratton Push Gas Lawn Mower b8721c

The PowerSmart 21 in. is a gas push mower with a 125cc Briggs & Stratton 4-stroke engine and a 20.5-inch cut. It bags, mulches and side-discharges, and the six-position height lever spans 1.5 to 3.9 inches. It is aimed at small yards, around a quarter acre. At $329.99 at Best Buy as of November 5, 2026, it sits at the top of its recent range, so it is not a bargain right now.

Best forSmall yards up to about a quarter acreBuyers who want a simple gas mower without self-propelHomeowners who switch between bagging and mulching
Pros
  • Briggs & Stratton engine is widely serviced and parts are easy to find
  • Three cutting modes: bag, mulch and side discharge
  • Six height settings from 1.5 to 3.9 inches
  • Light at 58.2 lb for a gas mower
  • 21-inch deck covers ground quickly
Cons
  • Push only, so slopes and thick grass take more effort
  • Manual recoil start, no electric start
  • Plastic/aluminum deck is less durable than steel
  • No self-propel at a price where some rivals offer it
  • Small 125cc engine bogs down in tall, wet grass

PowerSmart 21 in. 125cc Briggs & Stratton Push Gas Lawn Mower b8721c prices at every store

  • Best BuyNew

    In stock

    $329.99Observed at 1:33 AM
    Visit store
  • WalmartNew

    Out of stock

    $290.32Observed at 1:33 AM
    Visit store

Also available at

  • DK HardwareCheck price at DK Hardware

PowerSmart 21 in. 125cc Briggs & Stratton Push Gas Lawn Mower b8721c price history

Lowest price we've seen: $290.32 on Nov 5 at Walmart. Tracked across 3 stores since Nov 5.

What reviewers say

Owner feedback is mixed, averaging 3.6 out of 5 from 112 ratings. Buyers like the light weight and the cut for small yards, but several report starting trouble and flimsy deck parts.

Pros
  • Easy to push and maneuver
  • Cuts well on flat, maintained lawns
  • Good value for a Briggs & Stratton engine
Cons
  • Hard starting after storage
  • Deck and wheel hardware feel cheap
  • Struggles in thick or wet grass

Specifications

Mower Type
Lawn Mower
Drive Type
Push
Self Propelled
No
Power Source
Gas
Start Type
Manual
Cutting Width
20.5 inch
Bagging
Yes
Cutting Height Options
6 Position
Maximum Cutting Height
3.9 inch
Minimum Cutting Height
1.5 inch
Mulching
Yes
Cutting Method
Rotary
Side Discharge
Yes
Safety Features
Start/stop control lever
Transmission Type
Manual
Deck Material
plastic/aluminum
Deck Size
21"
Weight
58.2 lb
Engine Horsepower
6 HP
Engine Displacement
125cc
Engine Type
4 Stroke OHV
Cooling System
Forced air-cooling system
Cylinders
Single cylinder
Coverage Area
1/4 acre

Questions and answers

Is the PowerSmart 21 in. worth it at $329.99?
At $329.99 at Best Buy as of November 5, 2026, it is at the high end of its recent range. It makes sense for a small flat yard, but at that price a self-propelled or steel-deck mower is within reach.
Does it have electric start?
No. It uses a manual recoil pull start with a start/stop lever on the handle.
How large a lawn can it handle?
PowerSmart rates it for about a quarter acre. The 125cc engine and 20.5-inch cut suit small, regularly mowed lawns.
Can it mulch and bag?
Yes. It bags, mulches and side-discharges, so you can switch based on grass length and clippings.
How heavy is it?
58.2 lb. That is light for a gas mower, which helps on turns and when loading it into a truck.
When is it cheapest?
Gas mowers usually drop in late fall and around spring sales. Track its price history and buy below the current $329.99.
Where is the PowerSmart 21 in. 125cc Briggs & Stratton Push Gas Lawn Mower b8721c cheapest?
At Best Buy, for $329.99, as of our latest check.
What do buyers say about the PowerSmart 21 in. 125cc Briggs & Stratton Push Gas Lawn Mower b8721c?
Rated 3.6 out of 5 from 112 ratings.
Where can I buy the PowerSmart 21 in. 125cc Briggs & Stratton Push Gas Lawn Mower b8721c?
3 stores we checked sell it, including Walmart, Best Buy, DK Hardware.

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