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The PowerSmart 21-inch mower offers a 170cc OHV engine and rear-wheel drive, making it reliable for slopes. If you are searching for powersmart 21 self propelled gas lawn mower alternatives, you may want different specs. Some buyers prefer front-wheel drive for flat yards. Others might need a larger engine for thicker grass or a lighter unit for storage. You might also want a different cutting height range or a side-discharge option instead of rear discharge.
We selected these alternatives because their specifications overlap with the original model. Each list item shares the 21-inch cutting width and self-propelled drive, ensuring similar coverage per pass. We compared engine displacement, drive type, and mowing functions to find viable substitutes. This list includes gas models with comparable power and electric options for different power needs. You can choose based on whether you prioritize traction, mulching efficiency, or overall deck durability. The data highlights which features match your specific lawn conditions and maintenance preferences.
How these alternatives differ
SENIX 21-Inch 170cc Self-Propelled Gas Mower
The SENIX 21-Inch 170cc model shifts from rear-wheel drive to front-wheel drive. This change improves maneuverability on flat to moderately uneven terrain, whereas the PowerSmart excels on slopes. Both mowers share the same 170cc engine and 21-inch cutting width. The SENIX includes a 6-position height adjustment, matching the PowerSmart’s range. You get side discharge in addition to bagging and mulching. The SENIX weighs 61.7 pounds, which is slightly heavier than the PowerSmart. Choose this if you prioritize traction on flat ground over slope climbing ability.
PowerSmart 21-Inch 170cc Self-Propelled Gas Mower
This PowerSmart model uses a 4-stroke engine, similar to the original. It also features rear-wheel drive for slope traction and a 21-inch steel deck. The main difference is the model number and specific configuration. It offers the same 3-in-1 functions: bagging, mulching, and rear discharge. The weight is 59 pounds, making it slightly lighter than the SENIX alternatives. If you want the familiar rear-drive feel but prefer a different model variant, this fits. It maintains the durable steel deck construction and self-propelled ease for standard lawn care tasks without significant spec changes.
SENIX 21-Inch Self-Propelled Gas Mower
The SENIX 21-Inch Self-Propelled Gas Mower shares the 170cc engine and 21-inch cutting width with the PowerSmart. It also offers 3-in-1 functions including mulching and bagging. However, this model emphasizes precise height adjustments over raw traction power. It weighs 61.7 pounds. The drive type is self-propelled, but the focus is on fine-tuning the cut for flat to moderately sloped lawns. If you need exact height control and mulching efficiency rather than slope-specific rear-wheel traction, this alternative provides similar power with a different handling profile. It lacks the specific slope-focused design of the original.
AMERISUN 21" Self-Propelled Gas Mower
The AMERISUN 21-Inch mower matches the PowerSmart in engine displacement at 170cc and cutting width at 21 inches. It also uses rear-wheel drive for self-propelled movement. The key difference is the emphasis on durable steel deck construction for standard lawns. It offers 3-in-1 functions with bagging and side discharge. The weight is not listed, but the dimensions are similar. This model is practical for those who do not need maximum engine power or large bag capacity. It serves as a direct alternative for users who value sturdy deck material and reliable rear traction for everyday mowing tasks.
BILT HARD 21-Inch 201cc Self-Propelled Gas Mower
The BILT HARD 21-Inch mower upgrades the engine to 201cc, providing more torque than the PowerSmart’s 170cc unit. It retains the 21-inch cutting width and 3-in-1 functions. The weight is 89.2 pounds, significantly heavier than the PowerSmart. This model prioritizes engine power and precise height settings over lightweight portability. It lacks variable speed control mentioned in other models. If you need high torque for tough grass and do not mind the extra weight, this is a strong alternative. It offers more power but sacrifices the lighter, easier handling of the original 170cc PowerSmart mower.
Greenworks 48V 21in 3-in-1 Combo Kit
The Greenworks 48V model differs fundamentally as it is electric, not gas. It uses a brushless motor and 48V battery power. The cutting width remains 21 inches, and it offers 3-in-1 functions. It includes a leaf blower in the kit, which the PowerSmart does not. The weight is 78.3 pounds. This option suits users who want vertical storage and yard care versatility. It is ideal for those already owning Greenworks 24V tools. You trade gas engine power for battery convenience and additional equipment. It is best for users seeking a complete kit rather than a standalone gas mower with slope-specific traction.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | PowerSmart 21-Inch Rear-Wheel Drive Gas Mower Best overall | Sloped medium to large lawns | |
| 2 | SENIX 21-Inch 170cc Self-Propelled Gas Mower Best premium | 1/3-acre flat yards needing mulch or bagging | |
| 3 | PowerSmart 21-Inch 170cc Self-Propelled Gas Mower Best budget | Slopes and durable steel deck needs | |
| 4 | SENIX 21-Inch Self-Propelled Gas Mower Also great | lawns needing precise height adjustments and mulching | |
| 5 | AMERISUN 21" Self-Propelled Gas Mower Also great | Standard lawns needing durable steel deck construction | |
| 6 | BILT HARD 21-Inch 201cc Self-Propelled Gas Mower Also great | Users needing high torque and precise height settings | |
| 7 | Greenworks 48V 21in 3-in-1 Combo Kit Best 48v | Complete yard care kits with vertical storage |
PowerSmart 21-Inch Rear-Wheel Drive Gas Mower
Best for: Sloped medium to large lawns
- Cutting Width
- 21 in
- Drive Type
- Rear-wheel drive, self-propelled
- Mowing Functions
- 3-in-1 (bag, mulch, rear discharge)
- Motor Type
- 170cc OHV
- Height Adjustments
- 6 positions, 1.5" to 3.9"
- Power Type
- Gas
This PowerSmart mower features a 170cc OHV engine and a 21-inch steel cutting deck. It uses rear-wheel drive to handle slopes effectively. You can adjust the cutting height in six positions from 1.5 to 3.9 inches. The 3-in-1 design allows for bagging, mulching, or rear discharge. A 1.4-bushel collection bag is included. This self-propelled model suits medium to large yards with uneven terrain.
- 170cc OHV engine provides reliable power
- Rear-wheel drive aids traction on slopes
- 6-position height adjustment from 1.5 to 3.9 inches
- 3-in-1 mulching, bagging, and discharge options
- 170cc engine is less powerful than the 201cc option on this list
- Only 6 height settings compared to the 6-position adjustment found on competing SENIX models
- You need a mower for medium to large yards
- You are mowing on slopes or uneven terrain
- You want rear-wheel drive for better traction
- You prefer a battery-powered electric mower
- You need a cutting width larger than 21 inches
- You require a higher horsepower engine than 170cc
Verdict: PowerSmart 21" Self-Propelled Gas Mower is a practical choice for homeowners with sloped, medium-to-large lawns who need reliable rear-wheel traction. It fits users who prioritize consistent engine performance and versatile discharge options over maximum cutting power.
SENIX 21-Inch 170cc Self-Propelled Gas Mower
Best for: 1/3-acre flat yards needing mulch or bagging
- Cutting Width
- 21 in
- Drive Type
- Self-propelled, FWD
- Mowing Functions
- 3-in-1 (mulch, bag, side discharge)
- Motor Type
- 170 cc 4-cycle OHV gas
- Height Adjustments
- 6 positions, 1.25-3.75 in
- Engine Displacement
- 170cc
The SENIX 21" gas mower features a 170cc 4-cycle OHV engine delivering 3.8 HP. It offers a 21-inch cutting width and six height positions from 1.25 to 3.75 inches. The self-propelled front-wheel drive and 3-in-1 deck support mulching, bagging, and side discharge. This model suits users seeking reliable performance for yards up to 1/3 acre.
- 170cc 4-cycle OHV gas engine provides reliable power
- 6-position height adjustment allows precise cutting control
- 3-in-1 deck supports mulching, bagging, and side discharge
- Self-propelled front-wheel drive reduces user fatigue
- Large 11-inch rear wheels aid maneuverability on uneven terrain
- 170cc engine displacement is lower than the 201cc BILT HARD option
- 1.7-bushel grass bag capacity is smaller than typical larger models
- 61.7-pound weight is heavier than some 21-inch competitors
- You need a self-propelled mower for yards up to 1/3 acre
- You prefer front-wheel drive for easier turning around obstacles
- You want a 3-in-1 system for mulching or bagging
- You require more than 170cc of engine power
- You prefer rear-wheel drive for better traction on slopes
- You need a battery-powered or electric alternative
Verdict: SENIX 21" 170cc Self-Propelled Gas Mower fits users who want a durable steel-deck mower with front-wheel drive for flat to moderately uneven yards up to 1/3 acre.
PowerSmart 21-Inch 170cc Self-Propelled Gas Mower
Best for: Slopes and durable steel deck needs
- 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")
- Power Type
- Gas
This PowerSmart mower features a 170cc 4-stroke OHV engine and rear-wheel drive for traction on slopes. The 21-inch steel deck supports 3-in-1 mowing with 6 height positions from 1.5 to 3.9 inches. Weighing 59 pounds, it offers a foldable handle for storage. This model suits users seeking reliable gas power and rear-drive control for standard yard maintenance.
- 170cc 4-stroke OHV engine with auto choke
- Rear-wheel drive for slope traction
- 6-position height adjustment from 1.5 to 3.9 inches
- Durable steel deck construction
- 170cc engine displacement is lower than the 201cc option on this list
- 59-pound weight is heavier than the 48V battery kit alternative
- 6 height settings are fewer than the 7-position SENIX model
- You need rear-wheel drive for slopes
- You prefer a steel deck for durability
- You want a foldable handle for storage
- You require a higher horsepower engine
- You want a lighter battery-powered option
- You need more than 6 height settings
Verdict: PowerSmart 21" 170cc Rear-Drive Mower fits homeowners who prioritize rear-wheel traction and a durable steel deck for standard lawn care tasks.
SENIX 21-Inch Self-Propelled Gas Mower
Best for: lawns needing precise height adjustments and mulching
- Cutting Width
- 21 in
- Drive Type
- Self-propelled, front-wheel drive
- Mowing Functions
- 3-in-1
- Motor Type
- 170cc 4-cycle OHV
- Height Adjustments
- 6 positions, 1.25 to 3.75 inches
- Power Type
- Gas
The SENIX 21-inch gas mower features a 170cc engine delivering 3.8 HP. It offers six cutting height positions from 1.25 to 3.75 inches. The 3-in-1 deck supports mulching, side discharge, and bagging. Front-wheel drive aids maneuverability. This model suits users needing versatile height adjustments and reliable mulching performance for small to medium yards.
- Six cutting height positions for precise grass management
- 3-in-1 mowing functions including mulching and bagging
- Front-wheel drive for easier handling on slopes
- 170cc engine provides steady power for 1/3 acre
- Lower engine displacement than the 201cc BILT HARD alternative
- Front-wheel drive offers less traction on steep hills than rear-wheel drive models
- You need multiple cutting height options for varied lawn conditions
- You want a mulching mower for nutrient recycling
- You have a small yard under 1/3 acre
- You require a rear-wheel drive system for steep inclines
- You prefer a higher horsepower engine for thick grass
- You want a battery-powered electric mower
Verdict: SENIX 21-Inch Self-Propelled Gas Mower fits homeowners who prioritize adjustable cutting heights and mulching capabilities over maximum traction power. It is a solid choice for flat to moderately sloped lawns where fine-tuning the cut is important.
AMERISUN 21" Self-Propelled Gas Mower
Best for: Standard lawns needing durable steel deck construction
- Cutting Width
- 21 in
- Drive Type
- Self-propelled
- Mowing Functions
- 3-in-1 (mulch, bag, side discharge)
- Motor Type
- 170cc 4-cycle OHV
- Height Adjustments
- 6 positions, 1.5-3.9 in
- Power Type
- Gas
The AMERISUN 21-Inch Self-Propelled Gas Mower features a 170cc OHV engine and a 21-inch cutting width. It offers six height adjustments from 1.5 to 3.9 inches and includes a 1.4-bushel rear grass catcher. This self-propelled model handles varied terrain with ease. It suits users seeking a durable steel deck and versatile 3-in-1 mulching or bagging options for standard residential lawns.
- 170cc 4-cycle OHV engine with auto choke for reliable starting
- Six-position cutting height adjustment ranging from 1.5 to 3.9 inches
- 1.4-bushel rear grass catcher for efficient debris collection
- Heavy-duty steel deck provides durable construction
- 170cc engine displacement is lower than the 201cc engine found on the BILT HARD alternative
- 1.4-bushel grass catcher capacity is smaller than the 3-bushel capacity of the SENIX alternative
- You need a self-propelled mower for uneven terrain
- You want a 3-in-1 system for mulching or bagging
- You prefer a heavy-duty steel deck for durability
- You require a higher horsepower engine for large properties
- You need a larger grass catcher to reduce emptying frequency
- You prefer a battery-powered electric mower over gas
Verdict: AMERISUN 21-Inch Self-Propelled Gas Mower fits homeowners with standard lawns who value a sturdy steel deck and easy terrain navigation. It is a practical option for those who do not need maximum engine power or bag capacity.
BILT HARD 21-Inch 201cc Self-Propelled Gas Mower
Best for: Users needing high torque and precise height settings
- Cutting Width
- 21"
- Drive Type
- Self-Propelled
- Mowing Functions
- 3-in-1
- Motor Type
- 201cc 4-cycle OHV
- Height Adjustments
- 8-position (1.2" to 3.75")
- Power Type
- Gas
The BILT HARD 21" self-propelled gas mower features a 201cc 4-cycle OHV engine and an 8-position height adjustment. It offers 3-in-1 mowing versatility with mulching, bagging, and side discharge options. Weighing 89.2 pounds, it provides a wide 21-inch cutting path. This model suits users who want higher torque and more height settings than standard 170cc competitors.
- 201cc 4-cycle OHV engine delivers 9.0 ft·lb of torque
- 8-position cutting height adjustment from 1.2" to 3.75"
- 3-in-1 mowing functions for mulching, bagging, and side discharge
- Single lever synchronizes height adjustments across all four wheels
- Fixed walking speed limits speed control compared to variable drive models
- Heavier build at 89.2 pounds affects portability
- You need higher engine torque for thick grass
- You want precise cutting height control with 8 positions
- You prefer a self-propelled gas mower with mulching capability
- You require variable speed control for steep slopes
- You prefer a lighter mower for easy storage
- You want a battery-powered electric mower
Verdict: BILT HARD 21" 201cc Gas Mower fits users who prioritize engine power and fine height adjustments over lightweight portability and variable speed control.
Greenworks 48V 21in 3-in-1 Combo Kit
Best for: Complete yard care kits with vertical storage
- Cutting Width
- 21 in
- Drive Type
- Self-Propelled
- Voltage
- 48V (24V x 2)
- Battery Capacity
- 2 x 5 Ah
- Mowing Functions
- 3-in-1 (mulch, rear bag, side discharge)
- Motor Type
- Brushless
This Greenworks kit pairs a 21-inch self-propelled mower with a blower and trimmer. It uses 48V power from two 5Ah batteries and features a brushless motor. The mower offers 7 height positions and 3-in-1 mulching or bagging. You get a versatile tool set that saves space with vertical storage. It works with over 200 other Greenworks 24V tools for expansion.
- Brushless motor for improved efficiency
- 7-position height adjustment
- 3-in-1 mulch, bag, and side discharge
- Includes leaf blower and trimmer
- Vertical storage design
- Heavier at 78.3 pounds
- Fewer height settings than the 6-position gas models
- Shorter blower runtime of 20 minutes
- You want a complete yard care kit
- You need vertical storage for tools
- You already own Greenworks 24V tools
- You prefer gas power for longer runtime
- You need a lighter mower under 70 pounds
- You only need a mower without extras
Verdict: Greenworks 21in 48V Brushless Self-Propelled Mower fits users who want a complete yard care kit with a brushless motor and vertical storage. It suits those who already own Greenworks 24V tools for expansion.
Specifications side by side
| Spec | PowerSmart 21-Inch Rear-Wheel Drive Gas Mower | SENIX 21-Inch 170cc Self-Propelled Gas Mower | PowerSmart 21-Inch 170cc Self-Propelled Gas Mower | SENIX 21-Inch Self-Propelled Gas Mower | AMERISUN 21" Self-Propelled Gas Mower | BILT HARD 21-Inch 201cc Self-Propelled Gas Mower | Greenworks 48V 21in 3-in-1 Combo Kit |
|---|---|---|---|---|---|---|---|
| Cutting Width | 21 in | 21 in | 21 in | 21 in | 21 in | 21" | 21 in |
| Drive Type | Rear-wheel drive, self-propelled | Self-propelled, FWD | Self-propelled (rear-wheel drive) | Self-propelled, front-wheel drive | Self-propelled | Self-Propelled | Self-Propelled |
| Voltage | – | – | – | – | – | – | 48V (24V x 2) |
| Battery Capacity | – | – | – | – | – | – | 2 x 5 Ah |
| Mowing Functions | 3-in-1 (bag, mulch, rear discharge) | 3-in-1 (mulch, bag, side discharge) | 3-in-1 (mulch, side discharge, bag) | 3-in-1 | 3-in-1 (mulch, bag, side discharge) | 3-in-1 | 3-in-1 (mulch, rear bag, side discharge) |
| Motor Type | 170cc OHV | 170 cc 4-cycle OHV gas | 4-stroke OHV, 170 cc | 170cc 4-cycle OHV | 170cc 4-cycle OHV | 201cc 4-cycle OHV | Brushless |
| Height Adjustments | 6 positions, 1.5" to 3.9" | 6 positions, 1.25-3.75 in | 6 positions (1.5" – 3.9") | 6 positions, 1.25 to 3.75 inches | 6 positions, 1.5-3.9 in | 8-position (1.2" to 3.75") | 7 positions |
| Power Type | Gas | Gas | Gas | Gas | Gas | Gas | – |
| Engine Displacement | 170cc | 170cc | 170cc | 170cc | 170cc | – | – |
| Application | Slopes | – | – | – | – | – | Slopes |
| Included Equipment | – | – | – | – | – | – | Leaf Blower |
| Engine Stroke | – | – | 4-Stroke | – | – | – | – |
| Dimensions | 32.9 × 16.5 × 22.6 inches | 61 × 22.8 × 41.5 inches | 56.5 × 22 × 42.5 inches | 61 × 22.8 × 41.5 inches | 32.9 × 16.5 × 22.6 inches | – | 43.1 × 17.1 × 22.8 inches |
| Weight | – | 61.7 pounds | 59 pounds | 61.7 pounds | – | 89.2 pounds | 78.3 pounds |
| Color | Ink | Blue | Black | Blue | Black | – | Green&Black |
| Model | V8721S1 | A025054-A | DB8621S | LSSG-M10-III | AV8621S1 | TMA-0562-N3-0513 | CK24L5242 |
| Size | – | 21 Inch-170cc-6 Position | 21 Inch-170cc | 21-Inch Gas-Powered | 3IN1 Self-Propelled Gas Lawn Mower | 21 inch self propelled | 21" 3 Piece Combo (2×5.0Ah) |
You can compare powersmart self propelled gas lawn mower alternatives if you prefer a different engine displacement.
Frequently asked questions
Which alternative has a more powerful engine than the PowerSmart 170cc?
The BILT HARD 21-Inch model features a 201cc engine, which provides higher torque than the PowerSmart’s 170cc unit. This extra power helps maintain blade speed in thick grass. It is a solid choice if you prioritize cutting force over lightweight handling.
Is there a self-propelled option with front-wheel drive instead of rear-wheel drive?
Yes, the SENIX 21-Inch 170cc model uses front-wheel drive. This configuration offers better maneuverability on flat to moderately uneven yards. The PowerSmart relies on rear-wheel drive, which is generally preferred for maintaining traction on slopes.
Can I find a gas mower with a steel deck as an alternative?
The SENIX and AMERISUN models both feature durable steel decks. These decks offer robust construction for standard lawn care tasks. The PowerSmart also includes a steel deck, so you have multiple durable options if that is a priority for your maintenance routine.
What is the best alternative if I want a complete yard care kit?
The Greenworks 48V Combo Kit includes the mower along with a leaf blower. This bundle provides a complete solution for yard maintenance. It is ideal if you already own Greenworks 24V tools and want to expand your compatible battery ecosystem.
Which mower offers the most precise cutting height adjustments?
The SENIX 21-Inch Self-Propelled Gas Mower is noted for precise height adjustments. It allows you to fine-tune the cut for specific lawn conditions. This feature is particularly useful for flat to moderately sloped lawns where a uniform appearance is important.
Is there a brushless motor option in these alternatives?
The Greenworks 48V 21in model uses a brushless motor. This type of motor typically offers longer life and consistent power delivery compared to brushed alternatives. It is part of a 48V system that supports vertical storage for compact spaces.
