Is the Yard Force YF21-SD-TW self-propelled?

No. It is a push mower, so you supply the forward force. That makes it best for flat, modest-size lawns.

What engine does it use?

A 125cc Briggs & Stratton e450 with 4.5 ft-lbs gross torque. It starts with a Prime 'N Pull recoil system, not a battery or electric start.

Can it mulch and bag, or only side discharge?

All three. It ships with a side discharge chute and supports rear bagging and mulching.

How wide is the cut and how tall can it cut?

The deck is 21 inches and the cutting width is 20 inches. Cutting height adjusts across three positions from 1.25 to 3.75 inches.

What comes in the box?

The mower, a side discharge chute, engine oil and an operator's manual. Some assembly is required.

Is $229 a good price?

It is the best new price among the three stores listing it new, at $229.00 at Walmart as of November 5, 2026. That is a fair price for a 125cc Briggs & Stratton push mower.

Where is the Yard Force YF21-SD-TW 21" Gas Lawn Mower cheapest?

At Lowe's, for $329.00, as of our latest check.

What do buyers say about the Yard Force YF21-SD-TW 21" Gas Lawn Mower?

Rated 3.8 out of 5 from 59 ratings.

Where can I buy the Yard Force YF21-SD-TW 21" Gas Lawn Mower?

4 stores we checked sell it, including Lowe's, Yard Force USA, Walmart, MartDiscover.com.

Yard Force YF21-SD-TW 21" Gas Lawn Mower

3.8

Best price now

$329.00at Lowe'sObserved at 1:33 AM

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Lowe's

Yard Force YF21-SD-TW 21" Gas Lawn Mower

3.8

Best price now

$329.00at Lowe'sObserved at 1:33 AM

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Lowe's

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Our take on the Yard Force YF21-SD-TW 21" Gas Lawn Mower

The Yard Force YF21-SD-TW is a 20-inch walk-behind gas mower with a 125cc Briggs & Stratton e450 engine rated at 4.5 ft-lbs gross torque. It is a basic push mower with a steel deck and three cutting modes: rear bag, mulch and side discharge. It has three cutting heights from 1.25 to 3.75 inches and 7-inch wheels. The best new price is $229.00 at Walmart as of November 5, 2026, with three stores listing it new.

Best forSmall to mid-size flat lawnsBuyers who want a simple gas push mowerHomeowners who bag, mulch or side dischargeBudget shoppers who want a Briggs & Stratton engine

Pros

Briggs & Stratton e450 125cc engine with Prime 'N Pull start
Three cutting modes: bag, mulch and side discharge
Steel deck and hardened steel blade
Three cutting heights from 1.25 to 3.75 inches
Assembled in the US (Statesboro, GA)

Cons

Push only, no self-propulsion
Only three cutting height positions
20-inch cut is narrower than many 21-inch mowers
7-inch rear wheels are small for rough ground
No electric start

Yard Force YF21-SD-TW 21" Gas Lawn Mower prices at every store

Lowe'sNew
Availability unknown
$329.00Observed at 1:33 AM
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Yard Force USANew
Availability unknown
$399.00Observed at 1:33 AM
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Also available at

WalmartCheck price at Walmart
WalmartCheck price at Walmart
MartDiscover.comCheck price at MartDiscover.com

Yard Force YF21-SD-TW 21" Gas Lawn Mower price history

Lowest price we've seen: $229.00 on Nov 5 at Walmart. Tracked across 4 stores since Nov 5.

What reviewers say

Ratings average 3.8 out of 5 from 59 ratings. Buyers tend to like the easy start and the low price for a Briggs & Stratton engine. Some report assembly and cut-quality issues.

Pros

Easy Prime 'N Pull starting
Good value for the engine
Light and easy to push

Cons

Assembly and setup problems
Uneven cut on some lawns
Small wheels struggle on rough ground

About the Yard Force YF21-SD-TW 21" Gas Lawn Mower

The Yard Force YF21-SD-TW Gas walk-behind side-discharge lawn mower is powered for performance by Briggs & Stratton® e450 125cc engine that produces 4.5 ft-lbs. gross torque with easy-start Prime ‘N Pull ™ technology - innovative features for durability and high performance. The 7 in. front and rear wheels roll easily over all terrain for effortless lawn mowing. The hardened steel 20” dual-action blade stays sharp longer for a quality cut throughout the season. Assembled in Statesboro, GA using US and Global components. Yard Force products bring innovation and quality to maintaining your yard…Yard work made easy™

Specifications

Mower Type: Walk Behind
Drive Type: Push
Self Propelled: No
Power Source: Gas
Start Type: Prime N Pull Start, Recoil
Cutting Width: 20 in
Bagging: Yes (Rear Bag)
Cutting Height Options

Questions and answers

Is the Yard Force YF21-SD-TW self-propelled?: No. It is a push mower, so you supply the forward force. That makes it best for flat, modest-size lawns.
What engine does it use?: A 125cc Briggs & Stratton e450 with 4.5 ft-lbs gross torque. It starts with a Prime 'N Pull recoil system, not a battery or electric start.
Can it mulch and bag, or only side discharge?: All three. It ships with a side discharge chute and supports rear bagging and mulching.
How wide is the cut and how tall can it cut?: The deck is 21 inches and the cutting width is 20 inches. Cutting height adjusts across three positions from 1.25 to 3.75 inches.
What comes in the box?: The mower, a side discharge chute, engine oil and an operator's manual. Some assembly is required.
Is $229 a good price?: It is the best new price among the three stores listing it new, at $229.00 at Walmart as of November 5, 2026. That is a fair price for a 125cc Briggs & Stratton push mower.
Where is the Yard Force YF21-SD-TW 21" Gas Lawn Mower cheapest?: At Lowe's, for $329.00, as of our latest check.
What do buyers say about the Yard Force YF21-SD-TW 21" Gas Lawn Mower?: Rated 3.8 out of 5 from 59 ratings.
Where can I buy the Yard Force YF21-SD-TW 21" Gas Lawn Mower?: 4 stores we checked sell it, including Lowe's, Yard Force USA, Walmart, MartDiscover.com.