8 Best PowerSmart Side Discharge Lawn Mowers, Compared
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Finding the best PowerSmart side discharge lawn mowers requires looking closely at how each model handles your specific lawn size and terrain. We compared 8 options based strictly on the specifications published on the listings. Our top pick is the PowerSmart 18-Inch 144cc Gas Push Mower because its compact 18-inch deck offers superior maneuverability in tight spaces. This guide helps you decide which machine matches your yard's dimensions and your preferred power source, ensuring you choose the right tool for efficient side discharge mowing.
Quick picks
The best fit for you
- You need the most compact model for tight spaces PowerSmart 18-Inch 144cc Gas Push Mower Its 18-inch deck and 58.4-pound weight make it the smallest and lightest option.
- You want a lightweight cordless mower for small lawns PowerSmart 17-Inch 40V Steel Deck Push Mower It weighs only 39.7 pounds and uses a 40V brushless motor for easy handling.
- You require a durable steel deck for standard lawns PowerSmart 21-Inch 144cc Gas Push Mower This 21-inch model features sturdy steel construction and a reliable 144cc engine.
- You need traction for mowing sloped lawns PowerSmart 21-Inch 140cc Self-Propelled Mower Its self-propelled drive system provides the necessary traction for uneven or sloped terrain.
Our 8 picks
PowerSmart 18-Inch 144cc Gas Push Mower
Best for: small yards and tight maneuverability
- Mowing Function
- Side Discharge (what this guide is about)
- Power Source
- gas, 144cc 4-cycle
- Cutting Width
- 18 in
- Drive Type
- push
- Deck Material
- steel
- Cutting Height
- 1.5-3.9 in, 5 positions
View on Amazon: PowerSmart 18-Inch 144cc Gas Push Mower Affiliate link
This PowerSmart EasyCut model features an 18-inch steel deck and a 144cc 4-cycle OHV engine. It uses a side discharge function to handle thick grass efficiently. You get five cutting height positions ranging from 1.5 to 3.9 inches. The unit weighs 58.4 pounds and includes 8-inch rear wheels for maneuverability. It is a push mower designed for small yards and lawns.
Pros
- 144cc 4-cycle OHV engine with auto choke
- 18-inch durable steel deck
- 5-position height adjustment from 1.5 to 3.9 inches
- Side discharge design for thick grass
Cons
- 18-inch cutting width is narrower than the 21-inch models on this list
- Push drive requires manual effort unlike self-propelled options
- No mulching or bagging capability included in this configuration
Good fit if
- You have a small yard or tight spaces to navigate
- You prefer a lighter, more maneuverable mower
- You need a simple side discharge function for tall grass
Skip if
- You want a self-propelled mower for hilly terrain
- You need a wider 21-inch cutting path
- You require mulching or bagging capabilities
Verdict: PowerSmart 18-Inch Gas Side Discharge is a compact option for small lawns. It suits you if you prioritize maneuverability and simple side discharge over width or self-propulsion.
PowerSmart 21-Inch 144cc Gas Push Mower
Best for: Standard lawns needing mulch and side-discharge
- Mowing Function
- Side Discharge (what this guide is about)
- Power Source
- Gas, 144cc 4-cycle OHV
- Cutting Width
- 21 in
- Drive Type
- Push
- Deck Material
- Steel
- Cutting Height
- 1.5-3.9 in, 6 positions
View on Amazon: PowerSmart 21-Inch 144cc Gas Push Mower Affiliate link
This PowerSmart model features a 144cc 4-cycle OHV engine and a 21-inch steel deck. It offers mulching and side-discharge functions with a 6-position height adjustment from 1.5 to 3.9 inches. The push design weighs 59.4 pounds and includes 10-inch rear wheels. Its foldable frame saves storage space. It suits users needing reliable gas power for standard lawns without self-propulsion.
Pros
- 144cc 4-cycle OHV engine with auto-choke
- Durable all-steel 21-inch cutting deck
- 6-position single-lever height adjustment
- Foldable design saves 70% storage space
Cons
- Push drive requires manual effort
- Heavier at 59.4 pounds than lighter alternatives
- No self-propulsion mechanism included
Good fit if
- You prefer the consistent power of a gas engine
- You need mulching and side-discharge options
- You have a flat lawn and do not mind pushing
Skip if
- You require self-propelled ease on slopes
- You want a lightweight electric or battery unit
- You need a cutting width wider than 21 inches
Verdict: PowerSmart 21-Inch Gas Mower provides sturdy steel construction and reliable engine power for users who do not mind pushing. It is ideal for standard lawns where manual effort is acceptable.
PowerSmart 17-Inch 40V Steel Deck Push Mower
Best for: Small flat lawns under 1/8 acre
- Mowing Function
- Side Discharge (what this guide is about)
- Power Source
- 40V battery
- Cutting Width
- 17 in
- Voltage
- 40V
- Battery Capacity
- 4.0Ah
- Deck Material
- steel
View on Amazon: PowerSmart 17-Inch 40V Steel Deck Push Mower Affiliate link
This PowerSmart model offers a 17-inch steel cutting deck and a brushless motor for efficient mowing. It runs on a 40V 4.0Ah battery, allowing you to cover up to 1/8 acre per charge. The unit supports side discharge, mulching, and bagging. Its push design and foldable handle make it suitable for small, flat lawns where maneuverability and lightweight storage are priorities for you.
Pros
- Steel deck and blade for durability
- Brushless motor for high efficiency
- Covers up to 1/8 acre per charge
- 3-in-1 mulch, bag, and side discharge
- Foldable handle for compact storage
Cons
- Narrow 17-inch cutting width
- Push-only drive type
- Smaller 4.0Ah battery capacity
Good fit if
- You have a small lawn under 1/8 acre
- You need a lightweight mower for easy storage
- You prefer side discharge or mulching options
Skip if
- You require self-propelled power for hills
- You need to mow large areas beyond 1/8 acre
- You prefer a wider 21-inch cutting deck
Verdict: PowerSmart 40V 17" Cordless Mower suits small yards where its narrow deck and push design keep storage simple. It is a practical option for flat lawns under 1/8 acre.
PowerSmart 18-Inch Steel Deck Gas Push Mower
Best for: Small yards needing side discharge
- Mowing Function
- Side Discharge (what this guide is about)
- Power Source
- gas, 144cc 4-stroke OHV
- Cutting Width
- 18 in
- Drive Type
- push
- Deck Material
- steel
- Cutting Height
- 1.5-3.9 in, 5 positions
View on Amazon: PowerSmart 18-Inch Steel Deck Gas Push Mower Affiliate link
This PowerSmart model features an 18-inch steel deck and a 144cc 4-stroke OHV engine. It uses side discharge to clear clippings efficiently. The dual-lever system offers five height settings from 1.5 to 3.9 inches. It weighs 59 pounds and measures 58 inches long. This push mower suits small yards where maneuverability matters. The steel deck provides durability for routine lawn care tasks.
Pros
- 18-inch steel deck for durable cutting
- 144cc 4-stroke OHV engine with auto choke
- 5-position dual-lever height adjustment
- Side discharge for efficient grass dispersal
Cons
- Push drive requires manual effort
- 18-inch width cuts a narrower path
- No mulching or bagging capability listed
Good fit if
- You need a mower for small, open lawns
- You prefer side discharge over bagging
- You want a durable steel deck
Skip if
- You require self-propelled ease
- You need a wider 21-inch cut
- You want mulching or bagging options
Verdict: PowerSmart 18-Inch Gas Mower fits users with small yards who prioritize a durable steel deck and simple side discharge. It lacks the width or self-propulsion of larger models but offers reliable performance for basic mowing tasks.
PowerSmart 21-Inch 140cc Gas Push Mower
Best for: Standard lawns needing side discharge
- Mowing Function
- Side Discharge (what this guide is about)
- Power Source
- Gas, 140cc 4-stroke
- Cutting Width
- 21 in
- Drive Type
- Push
- Deck Material
- Steel
- Cutting Height
- 1.5-3.9 in, 6 positions
View on Amazon: PowerSmart 21-Inch 140cc Gas Push Mower Affiliate link
This PowerSmart model features a 140cc Briggs & Stratton 4-stroke engine and a 21-inch steel cutting deck. It operates as a push mower with a 3-in-1 cutting system that supports side discharge, rear bagging, and mulching. The deck height adjusts through six positions from 1.5 to 3.9 inches. It suits users who need a durable, steel-deck push mower for standard residential lawns.
Pros
- 21-inch steel cutting deck for durability
- 140cc Briggs & Stratton 4-stroke engine
- 3-in-1 cutting system with side discharge option
- 6 cutting height positions from 1.5 to 3.9 inches
Cons
- Push drive requires manual effort
- No self-propulsion system included
- No remote or app control listed
Good fit if
- You prefer a push mower for smaller yards
- You want a steel deck for durability
- You need side discharge capability
Skip if
- You require self-propelled movement
- You want a battery-powered cordless mower
- You prefer a lighter aluminum deck
Verdict: PowerSmart 21" Gas Push Mower fits users who want a sturdy, steel-deck push mower with side discharge. It is a practical choice for those who do not need self-propulsion.
PowerSmart 21-Inch 125cc Push Lawn Mower
Best for: small, flat lawns needing lightweight handling
- Mowing Function
- Side Discharge (what this guide is about)
- Power Source
- B&S 125cc 4-stroke OHV engine
- Cutting Width
- 21 in
- Drive Type
- push
- Cutting Height
- 1.5-3.9 in, 6 positions
- Application
- Yard, Garden, Lawn
View on Amazon: PowerSmart 21-Inch 125cc Push Lawn Mower Affiliate link
This PowerSmart mower features a Briggs & Stratton 125cc 4-stroke OHV engine and a 21-inch cutting deck. It offers 2-in-1 mulching and side discharge capabilities with a 6-position height adjustment ranging from 1.5 to 3.9 inches. The unit weighs 62 lbs for manageable maneuvering. It suits users needing a lightweight, push-style mower for small to medium yards who prefer simple assembly and reliable engine performance.
Pros
- Briggs & Stratton 125cc 4-stroke OHV engine
- Lightweight 62 lb design for easy pushing
- 6-position cutting height adjustment (1.5-3.9 in)
- 2-in-1 mulching and side discharge functions
Cons
- Push drive requires physical effort
- 125cc engine is smaller than competitors
- No self-propelled mechanism for hills
Good fit if
- You have a small to medium flat lawn
- You prefer a lightweight, easy-to-store mower
- You want simple mulching or side discharge
Skip if
- You need self-propelled power for slopes
- You require a larger 140cc+ engine
- You need a 3-in-1 bagging system
Verdict: PowerSmart 21-Inch 125cc Push Mower fits users with small, flat lawns who value lightweight handling over self-propelled convenience. It is a practical option for basic mowing tasks without the need for advanced propulsion or larger engines.
PowerSmart 21-Inch 125cc Gas Push Mower
Best for: Small, flat lawns needing durable steel deck
- Mowing Function
- Side Discharge (what this guide is about)
- Power Source
- Gas
- Cutting Width
- 21 in
- Drive Type
- Push
- Deck Material
- Steel
- Cutting Height
- 1.5-3.9 in, 6 positions
View on Amazon: PowerSmart 21-Inch 125cc Gas Push Mower Affiliate link
This PowerSmart model features a 21-inch steel deck and a 125cc Briggs and Stratton E300 engine. It offers a 2-in-1 mulching and side-discharge function with a push drive type. The unit includes a 6-position height adjustment ranging from 1.5 to 3.9 inches. It weighs 56.4 pounds and folds for storage. This mower suits users who need reliable power for small to medium lawns without self-propulsion.
Pros
- 125cc Briggs and Stratton E300 engine with Prime 'N Pull starting
- 21-inch cutting path with heavy-duty steel deck
- 6-position cutting height adjustment from 1.5 to 3.9 inches
- Folds to save 70% of storage space
Cons
- Push drive type requires manual effort
- 125cc engine is less powerful than the 144cc options on this list
- 56.4-pound weight is heavier than some competitors
Good fit if
- You prefer a push mower for flat, small lawns
- You want a steel deck for durability
- You need easy assembly with no tools required
Skip if
- You have a large or sloped lawn requiring self-propulsion
- You prefer a brushless motor for longer runtime
- You want a lighter mower for easy maneuvering
Verdict: PowerSmart 21-Inch Push Gas Mower is a solid choice for small, flat lawns where you do not need self-propulsion. Its steel deck and easy-start engine make it a reliable, no-fuss option for basic mowing tasks.
PowerSmart 21-Inch 140cc Self-Propelled Mower
Best for: sloped lawns and rear bagging needs
- Mowing Function
- Side Discharge (what this guide is about)
- Power Source
- gas, 140cc 4-stroke OHV
- Cutting Width
- 21 in
- Drive Type
- self-propelled
- Cutting Height
- 1.5-3.9 in, 6 positions
- Application
- Lawn
View on Amazon: PowerSmart 21-Inch 140cc Self-Propelled Mower Affiliate link
This PowerSmart model features a 140cc 4-stroke OHV engine and a 21-inch cutting width. It offers self-propelled drive for easier handling on slopes and uneven ground. You get 6-position height adjustment from 1.5 to 3.9 inches. The 3-in-1 design supports mulching, side discharge, and rear bagging. A foldable handle aids storage. This unit suits users needing traction without heavy pushing.
Pros
- Self-propelled drive system for better traction on inclines
- 140cc 4-stroke OHV engine with forced air-cooling
- 6-position cutting height adjustment (1.5 to 3.9 inches)
- Foldable handle for compact storage
Cons
- Heavier at 64 pounds compared to push models
- Gas engine requires more maintenance than cordless options
- No electric start system listed in specifications
Good fit if
- You mow lawns with slopes or uneven terrain
- You need rear bagging capability alongside side discharge
- You prefer self-propelled ease over manual pushing
Skip if
- You want a lightweight push mower under 50 pounds
- You prefer battery-powered operation without gas
- You need electric start for immediate ignition
Verdict: PowerSmart 21" Self-Propelled Gas Mower fits users who need traction on slopes and versatile bagging options. It offers reliable engine power and adjustable cutting heights for varied lawn conditions.
Specifications side by side
| Spec | PowerSmart 18-Inch 144cc Gas Push Mower | PowerSmart 21-Inch 144cc Gas Push Mower | PowerSmart 17-Inch 40V Steel Deck Push Mower | PowerSmart 18-Inch Steel Deck Gas Push Mower | PowerSmart 21-Inch 140cc Gas Push Mower | PowerSmart 21-Inch 125cc Push Lawn Mower | PowerSmart 21-Inch 125cc Gas Push Mower | PowerSmart 21-Inch 140cc Self-Propelled Mower |
|---|---|---|---|---|---|---|---|---|
| Power Source | gas, 144cc 4-cycle | Gas, 144cc 4-cycle OHV | 40V battery | gas, 144cc 4-stroke OHV | Gas, 140cc 4-stroke | B&S 125cc 4-stroke OHV engine | Gas | gas, 140cc 4-stroke OHV |
| Cutting Width | 18 in | 21 in | 17 in | 18 in | 21 in | 21 in | 21 in | 21 in |
| Voltage | not stated | not stated | 40V | not stated | not stated | not stated | not stated | not stated |
| Drive Type | push | Push | not stated | push | Push | push | Push | self-propelled |
| Battery Capacity | not stated | not stated | 4.0Ah | not stated | not stated | not stated | not stated | not stated |
| Deck Material | steel | Steel | steel | steel | Steel | not stated | Steel | not stated |
| Cutting Height | 1.5-3.9 in, 5 positions | 1.5-3.9 in, 6 positions | 1.5-3.9 in | 1.5-3.9 in, 5 positions | 1.5-3.9 in, 6 positions | 1.5-3.9 in, 6 positions | 1.5-3.9 in, 6 positions | 1.5-3.9 in, 6 positions |
| Mowing Function | side discharge | 2-in-1: mulch, side discharge | 3-in-1: mulch, bag, side discharge | side discharge | 3-in-1: side discharge, bag, mulch | 2-in-1 mulch, side discharge | 2-in-1 | 3-in-1 |
| Motor Type | not stated | not stated | brushless | not stated | not stated | not stated | not stated | not stated |
| Application | Yard, Small Yards, Lawn | Lawn | Lawn | Yard, Small Yards, Lawn | Lawn | Yard, Garden, Lawn | Lawn | Lawn |
| Size | 18 Inch-144cc-5 Heights | 21 Inch | 17" Mower (4.0Ah) | 18 Inch | not stated | 21in/2-IN-1 125cc Push (Discharging/Mulching) | 21"-125cc-6 Points | not stated |
| Engine Brand | not stated | not stated | not stated | not stated | Briggs | not stated | Briggs | not stated |
| Dimensions | 27.2 × 14.3 × 20.1 inches | 56 × 22 × 42 inches | 56 × 36.6 × 18.9 inches | 58 × 20 × 48 inches | 32.9 × 16.5 × 22.6 inches | 32.9 × 16.5 × 22.6 inches | 56.5 × 22 × 40.5 inches | 32.9 × 16.5 × 22.6 inches |
| Weight | 58.4 pounds | 59.4 pounds | 39.7 pounds | 59 pounds | not stated | 28.1 pounds | 56.4 pounds | 64 pounds |
| Color | red | Red | Black & Red | red | Black | Night Black | Black | Black |
| Model | DB8618C | DV8621C | MB2417A | DB8618C | B8621P | B8721C | B8721C | B8621SXC |
To protect your mower footprint between cuts, you can compare dimensions across the best storage sheds for lawn mowers.
How to Choose the Right One
-
Check the drive type
Most models in this guide use a push drive, meaning you must provide the forward momentum. If you have a flat lawn and do not mind the physical effort, a push mower like the PowerSmart 18-Inch 144cc Gas model works well. It weighs 58.4 pounds, which is manageable on level ground. However, if your terrain has slopes or you prefer less exertion, look for self-propelled options. The PowerSmart 21-Inch 125cc Self-Propelled model offers traction assistance. This feature helps maintain consistent speed without extra pushing. Choose push for flat, small areas. Select self-propelled for hills or larger lawns where walking speed matters.
-
Compare cutting deck widths
The cutting width determines how many passes you need to finish your lawn. You will find 17-inch, 18-inch, and 21-inch decks in this selection. A 17-inch deck, like on the PowerSmart 40V Steel Deck model, is ideal for tight spaces and small yards under 1/8 acre. It allows for easier maneuvering around obstacles. An 18-inch deck offers a balance of width and control. The 21-inch decks cover more ground per pass, making them efficient for standard lawns. Wider decks reduce mowing time but require more turning room. Match the width to your yard's dimensions and available storage space.
-
Select your power source
You must decide between gas and cordless power based on your maintenance preferences and usage frequency. Gas models, such as the PowerSmart 18-Inch 144cc, provide unlimited runtime and high torque. They require fuel mixing, oil changes, and engine upkeep. Cordless options, like the 40V PowerSmart 17-Inch model, offer quiet operation and zero emissions. You only need to charge the battery. Choose gas for large jobs or areas without easy charging access. Pick cordless for small, flat lawns where simplicity and low noise are priorities. Consider the convenience of refueling versus battery charging cycles.
-
Evaluate battery capacity
For cordless mowers, battery capacity dictates how long you can mow before recharging. The PowerSmart 17-Inch 40V model includes a 4.0 Ah battery. This capacity is sufficient for small lawns under 1/8 acre. If your lawn is larger, a single charge may not be enough. Check the amp-hour rating to estimate runtime. Higher amp-hours generally mean longer operation. However, battery performance also depends on grass thickness and cutting height. Ensure the battery voltage matches your mower's requirements. For gas mowers, this spec is irrelevant. Focus on fuel tank size instead for gas models.
-
Assess deck material
The deck material affects durability and weight. Steel decks, found on the PowerSmart 17-Inch 40V and 18-Inch Gas models, offer robust protection against impacts. They are heavier but resist dents better than plastic. A steel deck ensures longevity for rough terrain with rocks or roots. The PowerSmart 17-Inch 40V uses a steel deck for durability. Heavier decks can make the mower harder to push or maneuver. Consider the trade-off between strength and weight. If you mow on uneven ground, a steel deck provides better resistance. For flat, well-maintained lawns, other materials may suffice. Check the specifications for deck composition.
Frequently asked questions
Which PowerSmart side discharge mower is best for small yards?
The PowerSmart 18-Inch 144cc Gas Push Mower is the best overall choice for small yards. Its 18-inch cutting width and 58.4-pound weight make it easy to maneuver in tight spaces. This model prioritizes compact handling over the wider coverage of larger decks, making it ideal for lawns under 1/8 acre.
Does PowerSmart make a cordless side discharge mower?
Yes, the PowerSmart 17-Inch 40V Steel Deck Push Mower is a cordless option. It features a 40V brushless motor and a 4.0 Ah battery. Weighing only 39.7 pounds, it is the lightest model in this group. This makes it practical for flat lawns where you want to avoid gas maintenance.
Are there self-propelled PowerSmart mowers with side discharge?
Yes, the PowerSmart 21-Inch 125cc Push Lawn Mower and the PowerSmart 21-Inch 140cc Self-Propelled Mower offer self-propelled drive. The self-propelled models help with traction on slopes or uneven terrain. However, most models in this list are push mowers, requiring you to provide the forward momentum.
What is the difference between the 18-inch and 21-inch models?
The main difference is the cutting width. The 18-inch models, like the Best Overall pick, are narrower and better for maneuverability in tight spaces. The 21-inch models, such as the Best Premium option, cover more ground per pass. You should choose based on whether you prioritize ease of turning or faster coverage.
Do these mowers have steel decks?
Many models feature durable steel decks. The PowerSmart 17-Inch 40V model and the PowerSmart 18-Inch Steel Deck Gas Mower both include steel decks. Steel construction offers durability for basic mowing tasks. This material helps the mower withstand impacts and maintain structural integrity over time compared to lighter plastic alternatives.
Which model is the lightest to handle?
The PowerSmart 17-Inch 40V Steel Deck Push Mower is the lightest at 39.7 pounds. The PowerSmart 21-Inch 125cc Push Lawn Mower is also relatively light at 28.1 pounds. Lighter weight reduces physical effort when pushing or maneuvering the mower around obstacles in your yard.
What engine sizes are available in these gas models?
Gas models come with 125cc, 140cc, and 144cc engines. The 144cc engines are found in the 18-inch and 21-inch Best Overall and Best Premium picks. The 125cc engine is in the lightweight 21-inch model. Higher cc generally indicates more power for thick grass, though push models require your effort to move.