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Deal.ai › Troy-Bilt › Petrol Powered Mowers

Troy-Bilt

Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120

Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120

4.4(1,277 ratings)

Best price now

$289.99at eBayVerified

Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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Our take on the Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120

The Troy-Bilt TB120 is a 21-inch gas walk-behind push mower with a 140cc Briggs & Stratton 550ex engine and a steel deck. It cuts three ways — mulch, bag or side discharge — and the dual-lever system sets six cutting heights from 1.25 to 3.75 inches. It is a basic, no-frills mower aimed at small, flat yards. At $289.99 at eBay as of November 8, 2026, it sits at the low end of what this model has sold for recently.

Best forSmall, flat lawns under about a quarter acreBuyers who want a simple gas mower without self-propulsionHomeowners who mulch or bag depending on the seasonAnyone replacing an old push mower on a budget

Pros

Briggs & Stratton 550ex engine is a common, serviceable design
3-in-1 deck: mulch, bag or side discharge
Six cutting heights from 1.25 to 3.75 inches
Steel deck holds up better than plastic over time
1.9 bushel bag holds a decent amount of clippings

Cons

Push only, so hills and thick grass take real effort
Recoil start, no electric or battery assist
0.8 qt tank means frequent refueling on larger lots
No drive system or speed control
Side discharge can throw clippings onto paths and beds

Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120 prices at every store

WalmartNew
In stock
$368.00Free shippingVerified
Visit Walmart
eBayNew
Availability unknownSold by summit_supply (99.4% positive, 216 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$289.99Free shippingVerified
Visit eBay

Store links may earn us a commission. Some prices via Klarna.

Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120 price history

Lowest price we've seen: $368.00 on Nov 8 at Walmart. Tracked across 1 store since Nov 8.

What reviewers say

4.4 / 51,277 ratings

Rated 4.4 out of 5 from 1,277 ratings, owners generally find the TB120 a reliable, easy-to-start mower for small yards. Complaints tend to focus on the push-only design and the effort it takes on slopes or tall grass.

What people mention

StartingPraisedOwners say the Briggs & Stratton engine usually fires on the first or second pull.
Push effortCriticisedReviewers note that pushing uphill or through thick grass is tiring without a drive system.
Cut qualityPraisedUsers report an even cut and effective mulching on maintained lawns.
Height adjustmentPraisedThe dual-lever, six-position system is described as quick and easy to change.
Fuel tankMixedThe 0.8 qt tank is fine for small yards but means refueling on bigger jobs.
BuildMixedThe steel deck is seen as durable, but some owners find the mower heavy to maneuver.

About the Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120

The Troy-Bilt TB120 gas powered walk-behind push mower features a versatile 3-in-1, 21-inch deck, allowing you to mulch grass clippings for a healthier lawn, bag them for easy cleanup, or side discharge them for quick cutting of tall grass. This Troy-Bilt mower is an ideal choice for smaller yards, offering efficient performance. The dual-lever, 6-position height adjustment system makes changing cutting heights from 1.25 inches to 3.75 inches simple and convenient, ensuring a precise cut every time.

Specifications

color: RedSource
Engine displacement: 140ccSource
Engine brand: Briggs & Stratton®Source
Engine model: 550exSource
Starter type

Questions and answers

Is the TB120 self-propelled?: No. It is a push mower with no drive system, so you supply all the forward force. That is fine on flat ground but tiring on slopes.
What engine does it use?: A 140cc Briggs & Stratton 550ex with recoil start. It runs on regular gasoline and holds 0.8 qt, with 15 oz of oil.
Can it mulch, bag and side discharge?: Yes. The 21-inch steel deck is 3-in-1, and the grass bag holds 1.9 bushels.
How low and high does it cut?: Six positions span 1.25 to 3.75 inches, set with dual levers at each wheel.
Is $289.99 a good price?: It is the best new price found as of November 8, 2026, at the low end of this model's recent range. Two stores listed it new at that time.
Is it good for a large lawn?: It is best for small yards. The push design and small tank make large or hilly lots slow work.
Where is the Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120 cheapest?: At eBay, for $289.99, as of our latest check.
What do buyers say about the Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120?: Rated 4.4 out of 5 from 1,277 ratings.
Where can I buy the Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120?: 2 stores we checked sell it, including Walmart, eBay.

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Stores we've priced the Troy-Bilt 21 140cc Gas Walk-Behind Push Mower TB120 at

Walmart deals and prices

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RecoilSource

Fuel tank capacity

0.8 qtSource

Engine oil capacity

Drive system

Deck cutting width

Deck material

Cutting height range

1.25" - 3.75"Source

Deck positions

Grass bag capacity

1.9 BushelSource