Gas push mowers
PowerSmart 21 in. 3-in-1 B&S 140cc Specs: 21 in Deck, Mowing Time by Acre
Quick answer
The PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc has a 21 inch cutting deck and a 140 cc engine. At a typical 2.5 mph cutting speed it mows 1 acre in about 2 hr 46 min of open lawn, which suits up to about a third of an acre by standard deck sizing. It listed at $369.99 when this page was compiled.
On this page
- What are the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc specs?
- What is the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc sized for?
- What features does PowerSmart list?
- Who is the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc a good fit for?
- What are the alternatives to the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc?
- How do they compare on specs?
What are the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc specs?
| Spec | Value |
|---|---|
| Deck width | 21 in |
| Engine | 140 cc |
| Min cut height | 1.5 in |
| Max cut height | 3.9 in |
| Drive | push |
| Bagging | Yes |
| Mulching | Yes |
From PowerSmart's published specifications and the product listing.
What is the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc sized for?
| Lawn size | Open lawn | Hills | Trees and beds |
|---|---|---|---|
| 0.25 acres | 42 min | 51 min | 55 min |
| 0.5 acres | 1 hr 23 min | 1 hr 42 min | 1 hr 51 min |
| 1 acre | 2 hr 46 min | 3 hr 25 min | 3 hr 42 min |
| 2 acres | 5 hr 33 min | 6 hr 50 min | 7 hr 24 min |
| 3 acres | 8 hr 19 min | 10 hr 14 min | 11 hr 6 min |
Assumes 2.5 mph, a 15 percent pass overlap and 80, 65 and 60 percent efficiency for open, hilly and obstacle-filled lawns. That is about 0.36 acres per hour on open ground.
What features does PowerSmart list?
PowerSmart lists these features for the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc:
- High-Performance 140cc Engine - Experience powerful and efficient mowing with our 140cc Briggs&Stratton 4-stroke engine, designed for superior torque and minimal maintenance - no oil and gas mixing required!
- Versatile 3-in-1 Cutting System - Tackle any yard with the 3-in-1 functionality that lets you choose between side discharge, rear bagging, and mulching, ensuring your lawn looks its best in every season.
- Wider 21" Cutting Deck - Maximize your mowing efficiency with a spacious 21" cutting deck, allowing you to cover more ground in less time with precision and ease.
- 6-Height Adjustments for Custom Cuts - Customize your lawn's appearance with 6 adjustable cutting heights, ranging from 1.5 to 3.9 inches, ensuring a professional and consistent cut every time.
- Rugged and Durable Design - Built to withstand the test of time, this mower features a sturdy steel deck and a reliable frame, ensuring peak performance and a long service life for all your landscaping needs.
Who is the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc a good fit for?
Best for Flat small lawns where you want to bag or mulch. Pairs a 140cc Briggs & Stratton engine with a 21-inch steel deck and rear bag, mulch or side-discharge modes, the most complete feature set among these push models. It sits in the Expert tier of our gas push mowers coverage. See how it ranks against the rest in the best gas push mowers.
What are the alternatives to the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc?
BILT HARD 21 in. 3-in-1 Gas Push Mower, 144cc
$269.99A 144cc engine rated at 3.4 HP drives a 21-inch steel deck, and the box includes the grass bag, side chute and mulch plug, so all three clipping modes work from day one.
Best for: Small to medium flat yards that need bagging
Check price on Amazon
SENIX 21 in. 2-in-1 Gas Push Mower, 144cc
$249.99An 11-inch rear wheel makes it easier to push over bumpy ground, and SENIX rates the 144cc engine for yards up to half an acre, backed by a 2-year warranty.
Best for: Uneven lawns up to about half an acre
Check price on Amazon
PowerSmart 21 in. 2-in-1 Gas Push Mower, 144cc
$249.99A 21-inch mulching and side-discharge steel deck with single-lever height adjustment and a fold-flat handle keeps both cost and storage space low.
Best for: Budget buyers with a small flat lawn and a tight garage
Check price on AmazonHow do they compare on specs?
| Model | Price | Deck width | Engine | Min cut height | Max cut height | Drive | Bagging |
|---|---|---|---|---|---|---|---|
 PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc | $369.99 | 21 in | 140 cc | 1.5 in | 3.9 in | push | Yes |
| BILT HARD 21 in. 3-in-1 Gas Push Mower, 144cc | $269.99 | 21 in | 144 cc | 1 in | 3 in | push | Yes |
| SENIX 21 in. 2-in-1 Gas Push Mower, 144cc | $249.99 | 21 in | 144 cc | 1.25 in | 3.75 in | push | No |
| PowerSmart 21 in. 2-in-1 Gas Push Mower, 144cc | $249.99 | 21 in | 144 cc | 1.5 in | 3.9 in | push | No |
Frequently asked questions
How many acres can the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc mow?
With a 21 inch deck the PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc is sized for up to about a third of an acre of lawn. It covers roughly 0.36 acres per hour on open ground at 2.5 mph.
Where do these PowerSmart 21 in. 3-in-1 Gas Push Mower, Briggs & Stratton 140cc specs come from?
The figures on this page come from PowerSmart's published specifications and the product listing's own feature list. Sizing tables are our estimates from standard formulas, not measurements of a unit, and real results vary with conditions. Confirm details against the operator manual before you buy or use it.
Researched, not professional advice. This page is compiled from published specifications, manuals, labels and owner-review consensus, not hands-on testing. Follow the manufacturer's instructions and product label, and consult a qualified professional where safety, chemicals, fuel or structures are involved. As an Amazon Associate we earn from qualifying purchases.