Best 21 Inch Commercial Lawn Mower: 5 Picks Compared (2026)
Five 21 inch commercial lawn mowers, three gas and two cordless electric, with engine displacement, battery runtime, cutting height, deck build and warranty terms compared, plus who should skip each.
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Top picks at a glance
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- 1
Best OverallGreenworks 80V 21in9.5/10View on Amazon - 2
Best Gas Self-PropelledAMERISUN 21in 170cc9.5/10View on Amazon - 3
Best Gas PushSENIX 21in 144cc L69.4/10View on Amazon - 4
Best Cordless Self-PropelledEGO POWER+ LM2114SP9.4/10View on Amazon - 5
Best ValueAMERISUN 21in 144cc9.3/10View on Amazon - 6
SENIX 21" 144cc Gas Push Lawn MowerView on Amazon - 7
AMERISUN 21′′Gas Lawn MowerView on Amazon - 8
BLACK+DECKER Electric Lawn MowerView on Amazon - 9
LawnMaster MEB1114K Electric Corded Lawn Mower 15-Inch 11AMPView on Amazon - 10
BLACK+DECKER Electric Lawn Mower with Bike HandleView on Amazon
Finding the best 21 inch commercial lawn mower means balancing engine displacement or battery output, cutting deck materials, maneuverability, and drive systems. The five models below include three gas mowers and two cordless electric units. We compare cutting width, engine or battery specs, height adjustment ranges, wheel dimensions, and warranty terms directly from each listing, marking clearly when a specification is not stated.
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Quick picks
- Best Overall Greenworks 80V 21in: 80V brushless motor, two 2.0Ah batteries, steel deck and a 4-year warranty Check price on Amazon
- Best Gas Self-Propelled AMERISUN 21in 170cc: 170cc OHV engine, self-propelled drive and a 3-in-1 deck with a 1.4-bushel bag Check price on Amazon
- Best Gas Push SENIX 21in 144cc L6: 144cc 4-cycle engine, 11-inch rear wheels, 50 lb weight and a 2-year warranty Check price on Amazon
- Best Cordless Self-Propelled EGO POWER+ LM2114SP: 56V 6.0Ah battery, self-propelled dual toggles, 6.0 ft-lbs torque and LED headlights Check price on Amazon
- Best Value AMERISUN 21in 144cc: 144cc OHV engine, 21-inch steel deck, 63 lb weight and 2-in-1 cutting Check price on Amazon
Our acreage picks
Greenworks 80V 21in Push Lawn Mower (GLM801602)
Cordless 80V lawn mower with a 21-inch steel deck, two 2.0Ah batteries rated up to 60 minutes, a 30-minute rapid charger, and a 4-year warranty.
Who it's for: property owners who want gas-free mowing with a durable steel deck, fast charging, and a stated 4-year warranty.
Who should skip it: anyone needing a self-propelled drive for steep slopes or dense acreage.
Read the full review
The Greenworks GLM801602 is an 80V battery-powered walk-behind push mower with a 21-inch alloy steel deck and a brushless motor. The listing includes two 80V 2.0Ah batteries and a 30-minute rapid charger, stating up to 60 minutes of run time. It features a 3-in-1 design for mulching, rear bagging, and side discharge. The listing contains a contradiction in cutting height: the bullets describe a single-lever 5-position adjustment, while the spec table lists 7 positions from 1.38 inches to 7.62 centimeters. Weight is not stated. A 4-year manufacturer warranty is stated.
Pros
- The listing states a 4 Year manufacturer warranty
- Includes two 80V 2.0Ah batteries and a 30-minute rapid charger
- Alloy steel cutting deck listed in the specifications
- 3-in-1 design supports mulching, rear bagging and side discharge
Cons
- Weight is not stated in the listing
- Bullets state 5-position height adjustment while spec table states 7 positions
- Manual push operation with no self-propelled drive
- No safety certifications or slope ratings are stated
AMERISUN 21" Self-Propelled Gas Lawn Mower 170cc (AV8621S1)
Self-propelled gas mower with a 170cc OHV engine, 21-inch steel deck, 3-in-1 capability, and a 1.4-bushel grass catcher.
Who it's for: homeowners and commercial landscapers seeking a powerful 170cc self-propelled gas mower with bagging.
Who should skip it: buyers who require a stated manufacturer warranty or certified slope rating.
Read the full review
The AMERISUN AV8621S1 pairs a 170cc 4-stroke OHV gas engine with self-propelled drive and a 21-inch cutting deck. The listing highlights a 3-in-1 system supporting mulching, side discharge, and rear bagging with an included 1.4-bushel grass catcher. Cutting height adjusts across 6 positions from 1.5 to 3.9 inches. The listing presents a minor contradiction regarding wheel size: bullets cite 7-inch front and 10-inch rear wheels, whereas the spec table simply lists 10 inches. Material is noted as alloy steel and plastic. Weight and warranty terms are not stated.
Pros
- 170cc 4-stroke OHV gas engine provides consistent cutting power
- Self-propelled drive assists movement across slopes and uneven terrain
- 3-in-1 capability includes mulching, side discharge, and a 1.4-bushel bag
- Large 10-inch rear wheels improve maneuverability
Cons
- No warranty term is stated
- Weight is not stated in the listing
- Wheel size is listed as 10 inches in the spec table but 7-inch front and 10-inch rear in bullets
- No safety certifications or slope ratings are stated
SENIX 21-Inch Gas Push Lawn Mower 144cc (L6)
Gas push lawn mower featuring a 144cc 4-cycle engine, 21-inch path, 11-inch high-rear wheels, and a 2-year warranty.
Who it's for: users wanting a lightweight 50-pound gas push mower with high rear wheels and a 2-year warranty.
Who should skip it: those needing bagging capability or self-propelled drive for thick turf.
Read the full review
The SENIX L6 is a gas push mower powered by a 144cc 4-stroke engine with a 21-inch cutting deck. It weighs 50 pounds and features oversized 8-inch front and 11-inch rear wheels designed to roll smoothly over uneven terrain. Height adjustment uses a dual-lever system offering 6 positions from 1.25 to 3.75 inches. The listing notes a 2-in-1 cutting setup for mulching and side discharge, without bagging capabilities. The spec table notes wheel size simply as 11 inches, contrasting with the bullets detailing 8-inch and 11-inch wheels. A 2-year warranty covers the engine, deck, and wheels.
Pros
- The listing states a 2-year warranty covering engine, deck, and wheels
- Oversized 11-inch rear wheels and 8-inch front wheels ease pushing
- Lightweight at 50 pounds according to the specification table
- Dual-lever 6-position height adjustment from 1.25 to 3.75 inches
Cons
- 2-in-1 system supports only mulching and side discharge without a collection bag
- Manual push drive rather than self-propelled
- Spec table lists wheel size as 11 inches while bullets state 8-inch front and 11-inch rear
- Listing does not state deck material in the specification table
EGO POWER+ 21" Cordless Self-Propelled Mower Kit (LM2114SP)
Cordless 56V self-propelled mower delivering up to 6.0 ft-lbs torque, up to 50 minutes runtime, and LED headlights.
Who it's for: operators seeking a quiet, self-propelled cordless mower with headlights and high cutting torque.
Who should skip it: commercial landscapers who demand a steel deck or a stated commercial warranty.
Read the full review
The EGO POWER+ LM2114SP is a 56V cordless self-propelled mower featuring a 21-inch deck and a high-efficiency brushless motor delivering up to 6.0 ft-lbs of cutting torque. It comes with a 56V 6.0Ah ARC Lithium battery offering up to 50 minutes of runtime per charge. The dual-toggle handleset allows self-propel engagement from either hand, and height can be set across 7 positions from 1.25 to 4 inches. Features include bright LED headlights, adjustable handle height, and 3-in-1 capability. The spec table lists the material type as plastic and weight as 50.9 pounds. No warranty term is stated in the listing.
Pros
- Dual-toggle self-propel system engages from either hand
- High-efficiency brushless motor delivers up to 6.0 ft-lbs of cutting torque
- Up to 50 minutes run time with the included 56V 6.0Ah ARC Lithium battery
- 3-in-1 function provides mulching, bagging, and side discharge
Cons
- No warranty term is stated
- Deck material is specified as plastic rather than steel
- Runtime is limited to up to 50 minutes per battery charge
- No safety certifications or slope ratings are stated
AMERISUN 21" Gas Push Lawn Mower 144cc (AV8621C1)
Gas push mower featuring a 144cc OHV engine, 21-inch alloy steel deck, 2-in-1 cutting, and 6-position height adjustment.
Who it's for: budget-conscious property owners seeking a simple 21-inch steel deck gas push mower.
Who should skip it: anyone wanting a collection bag, self-propel assist, or a documented manufacturer warranty.
Read the full review
The AMERISUN AV8621C1 is a 21-inch gas push mower powered by a 144cc 4-cycle OHV engine. Built with an alloy steel deck, it weighs 63 lbs and incorporates a 2-in-1 cutting setup for mulching and side discharge. The cutting height adjusts via a 6-position lever between 1.5 and 3.9 inches. A contradiction appears regarding wheel dimensions: the listing bullets indicate 7-inch front and 10-inch rear wheels, but the spec table cites only 7 inches. No warranty term is stated.
Pros
- 144cc 4-cycle OHV engine with an easy pull-start system
- Heavy-duty 21-inch alloy steel deck for durability
- 6-position height adjustment lever spans 1.5 to 3.9 inches
- Foldable handle allows compact storage in sheds or garages
Cons
- No warranty term is stated
- Manual push operation with no self-propel drive
- 2-in-1 system offers mulching and side discharge without a grass catcher bag
- Spec table lists wheel size as 7 inches while bullets state 7-inch front and 10-inch rear
Other machines to compare
SENIX 21" 144cc Gas Push Lawn MowerCheck price on Amazon
AMERISUN 21′′Gas Lawn MowerCheck price on Amazon
BLACK+DECKER Electric Lawn MowerCheck price on Amazon
LawnMaster MEB1114K Electric Corded Lawn Mower 15-Inch 11AMPCheck price on Amazon
BLACK+DECKER Electric Lawn Mower with Bike HandleCheck price on Amazon
Side-by-side specs
| Model | Acre Score | Power type | Cutting width | Engine or battery | Drive | Deck material | Warranty |
|---|---|---|---|---|---|---|---|
| Greenworks 80V GLM801602 | 9.5/10 | Battery | 21 in | 80V, 2 x 2.0Ah | Push | Alloy Steel | 4 Year |
| AMERISUN AV8621S1 | 9.5/10 | Gas | 21 in | 170cc OHV | Self-propelled | Alloy Steel, Plastic | Not stated |
| SENIX L6 | 9.4/10 | Gas | 21 in | 144cc 4-cycle | Push | Not stated | 2-year |
| EGO LM2114SP | 9.4/10 | Battery | 21 in | 56V, 6.0Ah | Self-propelled | Plastic | Not stated |
| AMERISUN AV8621C1 | 9.3/10 | Gas | 21 in | 144cc OHV | Push | Alloy Steel | Not stated |
Specifications are manufacturer rated as listed, collected 9 October 2026.
Acreage and terrain fit
Greenworks 80V 21in Push Lawn Mower
AMERISUN 21in 170cc Self-Propelled Mower
SENIX 21-Inch Gas Push Lawn Mower
EGO POWER+ 21in Self-Propelled Cordless Mower
AMERISUN 21in 144cc Gas Push Mower
Buying guide: choosing the best 21 inch commercial lawn mower
Gas vs battery commercial push and walk-behind mowers
Gas mowers such as the 144cc SENIX and 170cc AMERISUN offer continuous operation through quick refueling, making them familiar options for extended yard work. In contrast, cordless mowers like the 80V Greenworks and 56V EGO eliminate exhaust fumes and pull cords, relying instead on lithium batteries rated for up to 50 or 60 minutes. Selecting between them depends on whether your property allows convenient battery recharging or requires uninterrupted fuel refills.
Self-propelled drive vs push operation
Drive mechanics impact physical fatigue during lengthy mowing sessions. The AMERISUN 170cc and EGO LM2114SP incorporate self-propelled systems that assist in navigating inclines and moving dense grass. The Greenworks 80V, SENIX L6, and AMERISUN 144cc are manual push units, requiring operator effort to propel across turf. If your yard includes slopes or rough patches, self-propelled drive reduces strain compared to standard push lawn mowers.
Deck materials and cutting height ranges
Deck construction directly affects service life and impact tolerance. The Greenworks and AMERISUN models feature alloy steel decks suited for demanding turf conditions. The EGO LM2114SP utilizes a plastic deck, which resists rust and helps keep total weight to 50.9 pounds. Cutting height flexibility is also critical: the SENIX provides adjustment down to 1.25 inches, while the EGO adjusts up to 4 inches across 7 distinct positions.
Wheel sizing and yard maneuverability
Wheel dimensions determine how smoothly a walk-behind mower rolls over uneven ground. The SENIX features oversized 11-inch rear wheels and 8-inch front wheels to roll over roots and ruts. Similarly, the AMERISUN models use 10-inch rear wheels. Larger rear wheels provide better leverage and maneuverability around landscape beds, fences, and tight corners.
Commercial walk-behind vs zero-turn mowers
A 21-inch walk-behind mower provides access through standard yard gates and tight passages where large equipment cannot enter. For wide lawns exceeding several acres, operators often transition to commercial zero-turn mowers to shorten working hours. To estimate cutting schedules across various deck sizes, consult our guide on how long it takes to mow an acre.
Slope safety and operating guidelines
None of the five listings publishes a certified slope rating. Always walk across slopes rather than moving up and down to reduce slip hazards. Prior to mowing, wear eye and hearing protection and clear sticks, rocks, and debris from the cutting path. For gas-powered mowers, always shut off the engine and let it cool completely before refueling.
Lawn size, deck width and speed in; minutes per mow out. Or work backward from the time you want to spend.
Walk the area first and clear stones, sticks, wire and toys. Wear eye and hearing protection, long pants and sturdy closed footwear, mow across slopes with a walk-behind (not up and down), and never pull a running mower toward you. Keep kids and pets well away. Refuel only with the engine off and cool. See CPSC lawn mower safety. Read our Safety Disclaimer.
The Acre Score explained
The Acre Score weighs five factors: performance (cutting width, engine displacement or battery platform, torque, and bagging options), build quality (deck construction, wheel sizing, and drive mechanisms), value (features relative to stated specifications), safety (operator controls such as blade brakes or safety certifications), and warranty (length of coverage and components included). A factor the listing does not state scores zero.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Greenworks 80V 21in | 9.5 | 29 | 20 | 20 | 0 | 3 |
| AMERISUN 21in 170cc | 9.5 | 32 | 21 | 21 | 0 | 0 |
| SENIX 21in 144cc L6 | 9.4 | 28 | 19 | 19 | 0 | 2 |
| EGO POWER+ LM2114SP | 9.4 | 32 | 19 | 20 | 0 | 0 |
| AMERISUN 21in 144cc | 9.3 | 26 | 18 | 19 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
FAQ: mowing large lots
How much does a 21 inch lawn mower weigh?
Weight varies significantly based on engine, battery, and deck materials. Among the models compared here, the SENIX L6 weighs 50 pounds, the EGO POWER+ LM2114SP weighs 50.9 pounds, and the AMERISUN AV8621C1 gas push mower weighs 63 lbs. The Greenworks 80V and AMERISUN 170cc listings do not state their product weights.
Is a 21 inch lawn mower good for commercial properties?
A 21 inch mower provides the agility needed for trimming around fences, landscaping beds, tight gates, and obstacles where large riders cannot reach. While commercial operations rely on wider machines for open acreage, a 21 inch push or self-propelled unit handles detailed trimming and confined lawns.
Can you put a 20 inch blade on a 21 inch lawn mower?
Mowers are engineered for specific blade lengths to ensure proper clearance inside the cutting deck and optimal airflow for bagging or mulching. You should always install the exact replacement blade size specified by the manufacturer in the operator’s manual rather than downsizing to a 20 inch blade.
How to change a 21 inch lawn mower blade?
Before servicing any mower blade, ensure the power source is disabled: disconnect the spark plug boot on gas models or remove the battery pack on cordless electric models. Wear heavy work gloves, block the blade with a piece of wood to prevent rotation, loosen the blade retaining bolt with the appropriate wrench, remove the worn blade, and install the replacement according to the manufacturer’s torque specifications.
How much oil does a 21 inch push mower take?
Oil capacity depends on the specific engine make and displacement. Neither the 144cc nor the 170cc gas listings in this review state exact crankcase oil capacities. Always consult the operator’s manual and verify the level on the engine dipstick before initial startup. Cordless electric mowers require no engine oil.
More mowing guides
- Best 21 Inch Lawn Mower: 5 Cordless and Gas Picks (2026)
- Best Walk Behind Push Mower: 5 Picks Compared (2026)
- Best Gas Lawn Mower (2026): 5 Top Picks Compared
- Best Commercial Zero-Turn Mower: 4 Picks for 5 to 10 Acres
- Best Self Propelled Mower Under $500 (2026): 5 Picks Compared
- Best Battery Lawn Mower under $300 (2026): 5 Top Picks
- How Long Does It Take to Mow an Acre? Times by Mower Type
- Best Riding Mower for 1 Acre: 4 Picks by Deck Size
Explore more equipment options in the walk-behind and robotic mowers section to compare tools for your acreage.
