As Amazon Associates, we earn from qualifying purchases. This means we may receive a small commission at no extra cost to you if you click through and make a purchase.
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
Finding the best PowerSmart lawn mowers with 4-Stroke requires checking the published specs. We compared 3 models to help you choose based on data, not hype. The PowerSmart 21-Inch 170cc Self-Propelled Gas Mower leads because its 170cc engine and self-propelled drive offer traction on slopes. Each pick highlights a specific spec advantage, from cutting width to drive type. This guide helps you decide which mower fits your yard size and terrain needs.
Match drive type to your yard
Choose self-propelled for slopes or uneven terrain. The top pick uses a 170cc engine with self-propelled drive to handle traction issues. Select a push model for flat, small yards. The budget option offers a 140cc engine and 3-in-1 functions without the weight of a drive system. Compare engine displacement and drive type to fit your lawn shape.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | PowerSmart 21-Inch 170cc Self-Propelled Gas Mower Best overall | Sloped or uneven lawns needing traction | |
| 2 | PowerSmart 21-Inch 140cc Gas Push Mower Best budget | Small yards needing durable 3-in-1 mowing | |
| 3 | PowerSmart 21-Inch 144cc Gas Push Mower Best 144cc | Flat yards needing a sturdy 144cc engine |
The best fit for you
- You mow sloped or uneven lawns – PowerSmart 21-Inch 170cc Self-Propelled Gas Mower – The self-propelled drive helps you maintain traction on difficult terrain.
- You need a durable budget mower – PowerSmart 21-Inch 140cc Gas Push Mower – It features a steel deck and versatile 3-in-1 mowing functions.
- You prefer a sturdy 144cc engine – PowerSmart 21-Inch 144cc Gas Push Mower – The 144cc engine provides power for efficient cutting on flat yards.
PowerSmart 21-Inch 170cc Self-Propelled Gas Mower
Best for: Sloped or uneven lawns needing traction
- Engine Stroke
- 4-Stroke
- Cutting Width
- 21 in
- Drive Type
- Self-propelled (rear-wheel drive)
- Mowing Functions
- 3-in-1 (mulch, side discharge, bag)
- Motor Type
- 4-stroke OHV, 170 cc
- Height Adjustments
- 6 positions (1.5" – 3.9")
This PowerSmart mower features a 170cc 4-stroke OHV engine and rear-wheel drive for reliable performance on uneven terrain. The 21-inch steel deck offers durability, while the 3-in-1 function allows for mulching, side discharge, or bagging. You get six height settings from 1.5 to 3.9 inches. It weighs 59 pounds and folds for storage. This model suits those needing self-propelled power and versatile mowing options.
- 170cc 4-stroke OHV engine for efficient cutting
- Rear-wheel drive self-propelled system for slope traction
- Steel deck construction for durability
- 3-in-1 versatility with mulch, side discharge, and bagging
- 6-position height adjustment from 1.5 to 3.9 inches
- Heavier build at 59 pounds compared to lighter push models
- 21-inch cutting width is standard, not wider for faster coverage
- You need rear-wheel drive for slopes or uneven ground
- You want a durable steel deck for long-term use
- You prefer mulching or bagging options for lawn cleanup
- You prefer a lighter mower under 50 pounds
- You only need a basic push mower without self-propulsion
- You require a wider cutting deck for large open areas
Verdict: PowerSmart 21" 170cc Self-Propelled Mower is a solid choice for homeowners with sloped or uneven lawns who value durability and self-propelled ease.
PowerSmart 21-Inch 140cc Gas Push Mower
Best for: Small yards needing durable 3-in-1 mowing
- Engine Stroke
- 4-Stroke
- Cutting Width
- 21"
- Drive Type
- Push
- Mowing Functions
- 3-in-1 (discharge, bagging, mulching)
- Motor Type
- 140cc Briggs&Stratton 4-stroke
- Height Adjustments
- 6 adjustments (1.5 to 3.9 inches)
This PowerSmart push mower features a 140cc Briggs & Stratton 4-stroke engine and a 21-inch steel deck. It offers three mowing functions: side discharge, rear bagging, and mulching. You can adjust the cutting height to six settings between 1.5 and 3.9 inches. The design is built for durability with a sturdy frame. It suits small to medium yards where manual pushing is acceptable.
- 140cc Briggs & Stratton 4-stroke engine provides reliable torque.
- 21-inch wide cutting deck covers more ground per pass.
- Three-in-one system allows side discharge, bagging, or mulching.
- Six height adjustments from 1.5 to 3.9 inches.
- 140cc engine displacement is smaller than the 170cc engines in other list options.
- Push drive type requires more physical effort than self-propelled models.
- Cutting height range tops out at 3.9 inches, which is lower than some competitors.
- You want a versatile 3-in-1 mowing system for various yard needs.
- You prefer a durable steel deck for long-term use.
- You are comfortable with manual pushing for smaller lawns.
- You need self-propelled power for hilly terrain.
- You require an engine larger than 140cc for heavy-duty work.
- You prefer a maximum cutting height above 3.9 inches.
Verdict: PowerSmart 21-Inch 140cc Push Mower fits homeowners with small, flat yards who value a durable steel deck and versatile mowing options over self-propelled convenience.
PowerSmart 21-Inch 144cc Gas Push Mower
Best for: Flat yards needing a sturdy 144cc engine
- Engine Stroke
- 4-Stroke
- Cutting Width
- 21 inch
- Drive Type
- Push
- Mowing Functions
- 2-in-1 (side-discharge, mulching)
- Motor Type
- 144cc 4-Stroke OHV
- Height Adjustments
- 6 positions, 1.5" to 3.9"
This PowerSmart model features a 144cc 4-stroke engine and a 21-inch cutting deck. It offers a 2-in-1 function for side-discharge or mulching. The height adjusts through 6 positions from 1.5 to 3.9 inches. It weighs 44 pounds and uses a push drive. This mower suits users who want a reliable, mid-range option for standard yards without self-propulsion.
- 144cc 4-stroke OHV engine with forced air cooling
- 21-inch cutting deck for a wider mowing path
- 6 height adjustment positions from 1.5 to 3.9 inches
- 95% pre-assembled for quick setup
- Push drive requires more physical effort than self-propelled models
- 44-pound weight is heavier than lighter push mowers
- 2-in-1 function offers fewer options than 3-in-1 models
- You need a reliable 144cc engine for moderate-sized yards
- You prefer a straightforward push mower without extra weight
- You want mulching and side-discharge capabilities
- You need self-propelled drive for hilly terrain
- You require a 3-in-1 bagging option
- You want a lighter mower under 40 pounds
Verdict: PowerSmart 21-Inch 144cc Push Mower fits users who prioritize a sturdy 144cc engine and a 21-inch deck for efficient cutting. It is a solid choice for flat yards where you do not mind pushing the mower.
Specifications side by side
| Spec | PowerSmart 21-Inch 170cc Self-Propelled Gas Mower | PowerSmart 21-Inch 140cc Gas Push Mower | PowerSmart 21-Inch 144cc Gas Push Mower |
|---|---|---|---|
| Cutting Width | 21 in | 21" | 21 inch |
| Drive Type | Self-propelled (rear-wheel drive) | Push | Push |
| Mowing Functions | 3-in-1 (mulch, side discharge, bag) | 3-in-1 (discharge, bagging, mulching) | 2-in-1 (side-discharge, mulching) |
| Motor Type | 4-stroke OHV, 170 cc | 140cc Briggs&Stratton 4-stroke | 144cc 4-Stroke OHV |
| Height Adjustments | 6 positions (1.5" – 3.9") | 6 adjustments (1.5 to 3.9 inches) | 6 positions, 1.5" to 3.9" |
| Power Type | Gas | Gas | Gas |
| Engine Displacement | 170cc | 140cc | 144cc |
| Engine Stroke | 4-Stroke | 4-Stroke | 4-Stroke |
| Dimensions | 56.5 × 22 × 42.5 inches | 32.9 × 16.5 × 22.6 inches | 33 × 23 × 18 inches |
| Weight | 59 pounds | – | 44 pounds |
| Size | 21 Inch-170cc | – | – |
| Color | Black | Black | gas |
| Model | DB8621S | B8621P | DB2321CR |
Check specs for your yard
Match drive type to terrain
Select self-propelled models for sloped or uneven lawns. The top pick features a 170cc engine with self-propelled drive to maintain traction on difficult ground. Push mowers suit flat, small yards where you prefer manual control. The budget option offers a 140cc engine and 3-in-1 functions without the added weight of a drive system. Choose based on your yard's slope to reduce fatigue during mowing.
Evaluate engine displacement power
Engine displacement indicates power output. Higher cc values generally provide more torque for thick grass. The leading model uses a 170cc engine for robust performance. The budget pick has a 140cc engine, sufficient for light to moderate cutting tasks. The third option offers a 144cc engine, striking a balance between power and weight. Check the cc rating to ensure the mower handles your grass type without stalling.
Consider cutting width efficiency
All listed models feature a 21-inch cutting width. This standard size balances coverage speed with maneuverability in tight spaces. A wider deck covers more ground per pass, reducing overall mowing time. However, it may be harder to navigate around obstacles like trees or garden beds. Since all options share this width, focus on other specs like drive type or engine power to differentiate your choice.
Choose mowing functions needed
Mowing functions determine how you dispose of clippings. The top and budget picks offer 3-in-1 capabilities, including mulching, side discharge, and bagging. This versatility allows you to adapt to different lawn care goals. The third model provides 2-in-1 functions, limiting your options. If you need to mulch clippings back into the lawn or bag them for cleanup, ensure the model supports those specific functions.
Assess weight and dimensions
Weight affects portability and storage. The self-propelled model weighs 59 pounds, offering stability but requiring more effort to lift. The 144cc push mower weighs 44 pounds, making it easier to maneuver and store. Dimensions vary, so check height and length if you have limited garage space. Heavier mowers may feel more durable but can be cumbersome to transport over stairs or into tight storage areas.
Frequently asked questions
Which PowerSmart 4-stroke mower is best for uneven terrain?
The PowerSmart 21-Inch 170cc Self-Propelled Gas Mower is the best choice for sloped or uneven lawns. Its self-propelled drive system provides necessary traction, allowing you to maintain control without excessive effort. The 170cc engine offers robust power for consistent cutting performance on difficult ground.
What is the best budget PowerSmart 4-stroke mower?
The PowerSmart 21-Inch 140cc Gas Push Mower serves as the best budget option. It features a durable steel deck and versatile 3-in-1 mowing functions, including mulching and side discharge. This model is ideal for small, flat yards where you do not require self-propelled convenience.
Does PowerSmart offer a 144cc 4-stroke engine option?
Yes, the PowerSmart 21-Inch 144cc Gas Push Mower is available for users who prefer a sturdy 144cc engine. It provides efficient cutting power for flat yards. This model operates as a push mower with a 2-in-1 function, making it a solid choice for manual operation.
What cutting width do these PowerSmart mowers have?
All three listed PowerSmart 4-stroke mowers feature a 21-inch cutting width. This deck size balances efficient coverage with maneuverability for residential yards. A 21-inch cut allows you to clear grass effectively while keeping the machine manageable for storage and transport around your property.
Are these mowers self-propelled or push models?
The selection includes both self-propelled and push options. The top-rated 170cc model is self-propelled, aiding traction on slopes. The 140cc and 144cc models are push mowers, requiring manual effort. You should choose based on whether your yard is flat or has uneven terrain.
What mowing functions are available on these models?
Mowing functions vary by model. The 170cc and 140cc models offer 3-in-1 capabilities, including mulching and side discharge. The 144cc model provides 2-in-1 functions. These options allow you to dispose of clippings according to your lawn care preferences, whether you prefer recycling or bagging.
How much do these PowerSmart mowers weigh?
Weight varies by configuration. The self-propelled 170cc model weighs 59 pounds. The 144cc push mower weighs 44 pounds. The 140cc model specifications do not list a weight. Heavier self-propelled units offer stability, while lighter push models may be easier to maneuver in tight spaces.
