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Finding the best lawn mowers with side discharge requires checking how each machine handles grass clippings. We compared 13 models using only the specifications published on their listings. The SENIX 22-Inch 170cc Self-Propelled Gas Mower leads this list. Its 22-inch cutting width and 170 cc engine provide the coverage and power needed for small to medium yards. You will see options for gas, cordless, push, and self-propelled drives. Each spec explains how the mower performs in your yard. This guide helps you decide which discharge style and power type fits your lawn care needs.
Match Engine Power to Yard Size
Your yard size determines the engine or voltage you need. Small yards under a third of an acre work well with 125cc to 140cc gas engines or 40V cordless models. Larger lawns up to half an acre benefit from 170cc gas engines or 60V cordless systems. Check the application rating and displacement to ensure the mower handles your grass volume without stalling.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | SENIX 22-Inch 170cc Self-Propelled Gas Mower Best overall | Small to medium yards needing side discharge | |
| 2 | Worx 21-Inch 40V Cordless Push Lawn Mower Also great | half-acre lawns needing versatile discharge modes | |
| 3 | SENIX 21-Inch 170cc Self-Propelled Gas Mower Also great | Flat yards up to 1/3 acre needing side discharge | |
| 4 | BILT HARD 21-Inch 201cc Self-Propelled Gas Mower Also great | Side discharge and mulching versatility | |
| 5 | SENIX 21-Inch Self-Propelled Gas Mower Best budget | yards up to 1/3 acre needing side discharge | |
| 6 | PowerSmart 22-Inch Gas Self-Propelled Lawn Mower Also great | Uneven terrain and wide cutting paths | |
| 7 | NovorikX 21-Inch 60V Self-Propelled Mower Best premium | large lawns needing extended battery runtime | |
| 8 | PowerSmart 21-Inch 140cc Gas Push Mower Best push | small yards needing manual push mowing | |
| 9 | AMERISUN 21" Self-Propelled Gas Mower Also great | standard lawns needing side discharge | |
| 10 | SENIX 20-Inch 125cc Gas Push Lawn Mower Also great | small yards needing side discharge | |
| 11 | Worx 20-inch 40V 3-in-1 Mower Best 4.0 ah | small yards needing side discharge | |
| 12 | PowerSmart 21-Inch 140cc Self-Propelled Mower Also great | Side discharge on slopes with moderate lawn size | |
| 13 | SENIX 21-Inch Gas Self-Propelled Mower Also great | small to medium yards needing side discharge |
The best fit for you
- You need a reliable mower for small to medium yards – SENIX 22-Inch 170cc Self-Propelled Gas Mower – Its 22-inch deck and 170cc engine handle typical lawn tasks efficiently.
- You want a clean cut for half-acre lawns – Worx 21-Inch 40V Cordless Push Lawn Mower – The 40V brushless motor offers a quiet cut with versatile discharge options.
- You need a mower for uneven terrain – PowerSmart 22-Inch Gas Self-Propelled Lawn Mower – The 22-inch deck and rear-wheel drive provide traction on uneven lawns.
- You require extended runtime for large lawns – NovorikX 21-Inch 60V Self-Propelled Mower – The 60V system with two 5.0 Ah batteries delivers robust power and runtime.
- You prefer manual push mowing on small yards – PowerSmart 21-Inch 140cc Gas Push Mower – The 140cc engine provides durable power without the weight of self-propulsion.
Is Side Discharge Worth It for Your Lawn?
Side discharge directs clippings out the right side of the deck. You should use this mode when mowing wide, open spaces where grass can scatter without obstruction. It works best on flat terrain up to a third of an acre. Self-propelled models with 170cc engines handle this task efficiently. Avoid side discharge if you mulch frequently or mow near fences, as clippings land directly on the path. Bagging keeps the area clean.
Worth it if
- You mow flat yards up to a third of an acre
- You need to clear wide, open spaces quickly
- You prefer not to empty a bag every few minutes
Skip it if
- You mulch clippings into the lawn regularly
- You mow close to fences or obstacles
- You want to collect all grass in a bag
SENIX 22-Inch 170cc Self-Propelled Gas Mower
Best for: Small to medium yards needing side discharge
- Mowing Functions
- Mulching, Bagging, Side Discharge
- Cutting Width
- 22-inch
- Drive Type
- Self-propelled
- Motor Type
- 170 cc 4-cycle OHV
- Height Adjustments
- 6-position (1.25" to 4")
- Power Type
- Gas
This SENIX mower features a 22-inch cutting deck and a 170 cc 4-cycle OHV engine. It offers three mowing functions: mulching, side discharge, and rear bagging. The self-propelled rear-wheel drive and single-speed transmission simplify operation. You get six height adjustments from 1.25 to 4 inches. The unit includes a 19-gallon bagger and weighs 72.8 pounds.
- 22-inch steel cutting deck covers more ground per pass
- 170 cc 4-cycle OHV engine provides consistent power
- Includes 19-gallon rear bagger for side discharge or bagging
- Six-position single-lever height adjustment from 1.25 to 4 inches
- Weighs 72.8 pounds, which is heavier than lighter push models
- Single-speed rear-wheel drive offers less traction control than variable speed systems
- You need a 22-inch deck for small to medium yards
- You want side discharge or bagging options with a gas mower
- You prefer a self-propelled mower for easier maneuvering
- You require variable speed control for steep or uneven terrain
- You need a lighter mower for easy lifting or storage
- You prefer a cordless electric power source
Verdict: SENIX 22-Inch Gas Self-Propelled Mower is a solid choice for homeowners with small to medium yards who need reliable side discharge or bagging capabilities. Its 22-inch deck and 170 cc engine handle typical lawn maintenance tasks efficiently.
Worx 21-Inch 40V Cordless Push Lawn Mower
Best for: half-acre lawns needing versatile discharge modes
- Mowing Functions
- 3-in-1, Mulching, Bagging, Side Discharge
- Cutting Width
- 21"
- Drive Type
- Push
- Voltage
- 40V
- Battery Capacity
- 5.0Ah
- Motor Type
- Brushless
This Worx push mower uses two 20V 5.0Ah batteries to create a 40V system. It features a brushless motor and IntelliCut technology that adjusts speed based on grass density. The 21-inch deck handles up to half an acre. You get three mowing modes: mulching, bagging, and side discharge. The handle collapses for storage, and you can adjust the cutting height in seven positions.
- Brushless motor delivers 40% more power than first-generation models
- IntelliCut sensors automatically adjust cutting speed for efficiency
- Includes two 20V 5.0Ah batteries for extended runtime
- Seven-position height adjustment from 1.5 to 4 inches
- Expandable PowerShare battery platform compatible with 140+ tools
- Push drive requires you to propel the unit yourself
- 55.6-pound weight is heavier than many gas alternatives
- Single lever height adjustment may be less precise than individual wheels
- You prefer zero emissions and quiet operation
- You already own other WORX PowerShare tools
- You want mulching, bagging, and side discharge options
- You need self-propelled drive for hilly terrain
- You have a lawn larger than half an acre
- You prefer gas engines for maximum torque
Verdict: Worx 21-Inch 40V Cordless Mower suits homeowners who want a clean, quiet cut with versatile discharge options. It fits those who value battery platform compatibility and smart speed adjustments over raw propulsion power.
SENIX 21-Inch 170cc Self-Propelled Gas Mower
Best for: Flat yards up to 1/3 acre needing side discharge
- Mowing Functions
- 3-in-1, Mulching, Bagging, Side Discharge
- Cutting Width
- 21 in
- Drive Type
- Self-propelled, FWD
- Motor Type
- 170 cc 4-cycle OHV gas
- Height Adjustments
- 6 positions, 1.25-3.75 in
- Engine Displacement
- 170cc
This SENIX mower features a 21-inch steel deck and a 170 cc 4-cycle OHV engine delivering 3.8 HP. It offers 6 cutting heights from 1.25 to 3.75 inches and supports side discharge, mulching, and bagging. The self-propelled front-wheel drive and 11-inch rear wheels aid maneuverability. It is designed for yards up to 1/3 acre and includes a 1.7-bushel bagger for grass collection.
- 21-inch cutting width for efficient coverage
- 170 cc engine provides 3.8 HP and 6.5 ft-lb torque
- 6-position height adjustment from 1.25 to 3.75 inches
- Self-propelled front-wheel drive reduces user fatigue
- 170 cc engine displacement is lower than the 201 cc option available in the same brand line
- 61.7-pound weight is heavier than lighter push or smaller deck models
- 1.7-bushel bagger capacity is smaller than larger 22-inch deck options
- You need side discharge capability for a yard up to 1/3 acre
- You prefer self-propelled front-wheel drive for easier maneuvering
- You want 6 cutting height positions for varied grass lengths
- You require a battery-powered or cordless mower
- You have a yard larger than 1/3 acre
- You need rear-wheel drive for steep or uneven terrain
Verdict: SENIX 21-Inch 170cc Gas Mower is a solid choice for homeowners with flat to moderately uneven yards up to 1/3 acre who value side discharge and self-propelled ease.
BILT HARD 21-Inch 201cc Self-Propelled Gas Mower
Best for: Side discharge and mulching versatility
- Mowing Functions
- 3-in-1, Mulching, Bagging, Side Discharge
- Cutting Width
- 21"
- Drive Type
- Self-Propelled
- Motor Type
- 201cc 4-cycle OHV
- Height Adjustments
- 8-position (1.2" to 3.75")
- Power Type
- Gas
The BILT HARD 21-inch self-propelled mower features a 201cc 4-cycle OHV engine and a steel deck. It supports 3-in-1 functions, including side discharge. You get 8 cutting height positions from 1.2 to 3.75 inches. The fixed walking speed simplifies operation. This gas model weighs 89.2 pounds. It suits users needing reliable power and versatile grass management for medium-sized lawns.
- 201cc 4-cycle OHV engine delivers 9.0 ft·lb of torque
- 8-position height adjustment from 1.2 to 3.75 inches
- 3-in-1 capability for mulching, bagging, and side discharge
- Self-propelled drive reduces pushing effort
- Fixed walking speed limits speed control compared to variable drive models
- 89.2-pound weight is heavier than many 21-inch competitors
- Steel deck adds mass compared to lighter composite alternatives
- You want side discharge for quick grass removal
- You prefer a single-lever height adjustment system
- You need a self-propelled gas mower for uneven terrain
- You require variable speed control for the self-propelled drive
- You prefer a lighter mower under 80 pounds
- You need more than 8 cutting height positions
Verdict: BILT HARD 21-Inch 201cc Gas Mower fits users who prioritize engine torque and side discharge versatility over variable speed control or lightweight portability.
SENIX 21-Inch Self-Propelled Gas Mower
Best for: yards up to 1/3 acre needing side discharge
- Mowing Functions
- 3-in-1, Mulching, Bagging, Side Discharge
- Cutting Width
- 21 in
- Drive Type
- Self-propelled, front-wheel drive
- Motor Type
- 170cc 4-cycle OHV
- Height Adjustments
- 6 positions, 1.25 to 3.75 inches
- Power Type
- Gas
This SENIX model features a 21-inch steel deck and a 170cc 4-cycle engine producing 3.8 HP. It is a self-propelled, front-wheel drive mower with 6 height settings from 1.25 to 3.75 inches. The 3-in-1 system supports side discharge, mulching, and bagging. It includes a 16-gallon bag and weighs 61.7 pounds. You can use it for yards up to 1/3 acre.
- 21-inch cutting width for efficient coverage
- 170cc engine delivers 3.8 HP
- 6-position height adjustment from 1.25 to 3.75 inches
- Includes 16-gallon rear bag for side discharge and mulching
- Front-wheel drive aids maneuverability
- 170cc engine is smaller than the 201cc engines in the list
- 61.7-pound weight is heavier than some competitors
- 1/3 acre capacity is lower than the 1/2 acre rating of other models
- You need side discharge capability for a yard up to 1/3 acre
- You prefer a steel deck for durability
- You want a self-propelled mower with 6 height settings
- You require a 201cc engine or larger
- You need a mower rated for 1/2 acre or more
- You prefer a lighter unit under 60 pounds
Verdict: SENIX 21-Inch Gas Mower fits users with small to medium yards who prioritize a steel deck and side discharge. It offers adequate power for 1/3 acre spaces but lacks the higher engine displacement found in other options.
PowerSmart 22-Inch Gas Self-Propelled Lawn Mower
Best for: Uneven terrain and wide cutting paths
- Mowing Functions
- 3-in-1, Side Discharge
- Cutting Width
- 22 in.
- Drive Type
- Self-propelled
- Motor Type
- 170cc 4-stroke OHV
- Height Adjustments
- 6 positions (1.5" to 3.9")
- Power Type
- Gas
This PowerSmart mower features a 22-inch steel deck and a 170cc 4-stroke engine. It uses rear-wheel drive for traction on uneven terrain. The 3-in-1 system includes side discharge, mulching, and bagging. A 60L grass bag reduces emptying frequency. You get six height settings from 1.5 to 3.9 inches. It weighs 75 pounds.
- 22-inch cutting width covers more ground per pass
- Rear-wheel drive improves traction on slopes
- 60L grass bag holds more clippings
- 170cc 4-stroke OHV engine handles thick grass
- Heavier at 75 pounds than lighter competitors
- 170cc engine is less powerful than 201cc options
- 60L bag capacity is smaller than some rivals
- You need a wide 22-inch cutting path
- You mow on slopes requiring rear-wheel drive
- You want side discharge and bagging options
- You prefer a lighter push mower
- You want the highest engine displacement available
- You need a cordless electric model
Verdict: PowerSmart 22-Inch 170cc Self-Propelled Gas Mower suits users who prioritize a wide cutting deck and rear-wheel traction for uneven lawns. It is a solid choice for those who prefer gas power and side discharge capabilities.
NovorikX 21-Inch 60V Self-Propelled Mower
Best for: large lawns needing extended battery runtime
- Mowing Functions
- 3-in-1, Mulching, Bagging, Side Discharge
- Cutting Width
- 21 in
- Drive Type
- Self-propelled
- Voltage
- 60 V
- Battery Capacity
- 2 x 5.0 Ah
- Motor Type
- 1200W brushless
This NovorikX mower uses a 60V platform with a 1200W brushless motor and a 21-inch steel deck. It offers variable self-propelled speed from 0.9 to 3.6 MPH. You get two 5.0 Ah batteries for extended runtime on lawns up to 1 acre. It handles mulching, bagging, and side discharge. This setup suits you if you want a powerful cordless option for medium to large yards.
- 1200W brushless motor for strong cutting power
- Includes two 5.0 Ah batteries for extended runtime
- Variable speed drive from 0.9 to 3.6 MPH
- 21-inch wide steel cutting deck
- Heavier at 86 pounds than most gas competitors
- Battery capacity is 5.0 Ah, lower than some 7.5 Ah options
- Maximum drive speed of 3.6 MPH is slower than some models
- You need a cordless mower for lawns up to 1 acre
- You want variable speed control for slopes
- You prefer brushless motor efficiency
- You need a lighter push mower
- You prefer gas engine simplicity
- You want a faster maximum drive speed
Verdict: NovorikX 21" 60V Brushless Self-Propelled delivers robust power for large yards. It fits you if you prioritize runtime and variable speed control over lightweight maneuverability.
PowerSmart 21-Inch 140cc Gas Push Mower
Best for: small yards needing manual push mowing
- Mowing Functions
- 3-in-1, Mulching, Side Discharge
- Cutting Width
- 21"
- Drive Type
- Push
- Motor Type
- 140cc Briggs&Stratton 4-stroke
- Height Adjustments
- 6 adjustments (1.5 to 3.9 inches)
- Power Type
- Gas
This PowerSmart mower features a 140cc Briggs & Stratton 4-stroke engine and a 21-inch cutting deck. It operates as a push model with side discharge capability, along with bagging and mulching options. You get six height adjustments from 1.5 to 3.9 inches. The steel deck offers durability for residential use. It suits small yards where you prefer manual effort over self-propulsion.
- 140cc Briggs & Stratton 4-stroke engine
- 21-inch steel cutting deck
- 6 height adjustments (1.5 to 3.9 inches)
- 3-in-1 functionality including side discharge
- 140cc engine displacement is lower than the 170cc and 201cc engines found in other list options
- Push drive type requires more physical effort than the self-propelled models on this list
- 21-inch cutting width is narrower than the 22-inch decks available in other options
- You have a small lawn under half an acre
- You prefer manual push mowers for exercise
- You want side discharge without the weight of self-propulsion
- You need self-propelled drive for hilly terrain
- You require a wider 22-inch cutting deck for efficiency
- You want an engine with more than 140cc of displacement
Verdict: PowerSmart 21-Inch Gas Push Mower fits homeowners with small, flat yards who want a durable steel deck and side discharge without self-propulsion. It is a practical option for those who do not need the extra power or width of larger models.
AMERISUN 21" Self-Propelled Gas Mower
Best for: standard lawns needing side discharge
- Mowing Functions
- 3-in-1, Bagging, Side Discharge
- Cutting Width
- 21 in
- Drive Type
- Self-propelled
- Motor Type
- 170cc 4-cycle OHV
- Height Adjustments
- 6 positions, 1.5-3.9 in
- Power Type
- Gas
The AMERISUN 21" Gas Self-Propelled Mower features a 170cc 4-cycle OHV engine and a 21-inch steel deck. It offers 3-in-1 mowing functions including side discharge, mulching, and bagging with a 1.4-bushel catcher. The 6-position height adjustment ranges from 1.5 to 3.9 inches. This self-propelled unit reduces effort on varied terrain. It suits homeowners seeking a durable, versatile gas mower for standard yard maintenance.
- 170cc 4-cycle OHV engine with auto choke
- 21-inch cutting width for efficient coverage
- 3-in-1 functionality: mulch, bag, side discharge
- 6-position height adjustment (1.5-3.9 inches)
- Self-propelled drive for reduced effort
- 170cc engine displacement matches several competitors on the list
- 1.4-bushel grass catcher capacity is standard rather than high-volume
- Steel deck construction adds weight compared to lighter alternatives
- You need side discharge capability for clearing clippings
- You prefer the reliability of a gas-powered engine
- You want a self-propelled mower for hilly terrain
- You require a cordless electric power source
- You need a cutting width larger than 21 inches
- You prefer a lightweight plastic deck for easy maneuvering
Verdict: The AMERISUN 21" Gas Self-Propelled Mower delivers steady performance with its 170cc engine and versatile 3-in-1 design. It fits homeowners who need reliable side discharge and self-propelled ease for medium-sized lawns.
SENIX 20-Inch 125cc Gas Push Lawn Mower
Best for: small yards needing side discharge
- Mowing Functions
- Side Discharge
- Cutting Width
- 20 inches
- Drive Type
- Push
- Motor Type
- 4-cycle gas
- Height Adjustments
- 5-position, 1.25 to 3.75 inches
- Dimensions
- 26.5 × 21.7 × 14 inches
This SENIX push mower features a 20-inch steel deck and a 125 cc Briggs & Stratton engine. It offers side discharge and five cutting heights from 1.25 to 3.75 inches. The 49-pound build includes 7-inch wheels for maneuverability. It suits small to medium yards where you prefer manual push operation and reliable gas power.
- 20-inch steel cutting deck
- 125 cc Briggs & Stratton engine
- 5-position height adjustment
- Side discharge function
- 125 cc engine is smaller than the 140-201 cc options on this list
- Push drive requires more physical effort than self-propelled models
- 49-pound weight is heavier than many competitors
- You have a small to medium lawn
- You prefer a side discharge setup
- You want a durable steel deck
- You need self-propelled convenience
- You require a cutting width over 20 inches
- You want a more powerful engine than 125 cc
Verdict: SENIX 20-Inch Gas Lawn Mower fits users with smaller yards who value a steel deck and side discharge over self-propelled ease. It delivers reliable power for manual mowing tasks.
Worx 20-inch 40V 3-in-1 Mower
Best for: small yards needing side discharge
- Mowing Functions
- 3-in-1, Mulching, Bagging, Side Discharge
- Cutting Width
- 20"
- Drive Type
- push
- Voltage
- 40V
- Battery Capacity
- 2 x 4.0Ah
- Height Adjustments
- 7 positions (1.5" to 4.25")
This Worx push mower uses 40V power with two 4.0Ah batteries to handle yards up to 1/2 acre. It features a 20-inch steel deck and offers three mowing modes, including side discharge. You get seven cutting height positions ranging from 1.5 to 4.25 inches. The collapsible handle aids storage, and the PowerShare system allows battery use across other tools. It is a practical option for those seeking gas-free mowing with flexible disposal options.
- Includes two 4.0Ah PowerShare batteries for extended runtime
- Three mowing modes: mulching, bagging, and side discharge
- Seven-position height adjustment from 1.5 to 4.25 inches
- Collapsible handle enables vertical storage
- 20-inch cutting width is narrower than most competitors on this list
- Push drive requires manual effort unlike self-propelled models
- Weighs 53.6 pounds, which is heavier than some alternatives
- You want side discharge capability without gas maintenance
- You already own other WORX 40V PowerShare tools
- You have a yard up to 1/2 acre
- You need a self-propelled drive for steep slopes
- You require a cutting width wider than 20 inches
- You prefer a gas-powered engine for maximum torque
Verdict: Worx 40V 20-Inch Cordless Mower suits homeowners with small to medium lawns who value the flexibility of side discharge and the convenience of a shared battery system. It is a solid choice for those willing to push the mower to avoid gas fumes and noise.
PowerSmart 21-Inch 140cc Self-Propelled Mower
Best for: Side discharge on slopes with moderate lawn size
- Mowing Functions
- 3-in-1, Mulching, Bagging, Side Discharge
- Cutting Width
- 21"
- Drive Type
- Self-Propelled
- Motor Type
- 4-stroke, OHV, single-cylinder
- Height Adjustments
- 6-position, 1.5 to 3.9 inches
- Engine Displacement
- 140cc
This PowerSmart mower offers 3-in-1 functionality including side discharge. It features a 140cc 4-stroke engine and a 21-inch cutting width. The self-propelled drive helps on slopes. You get six height positions from 1.5 to 3.9 inches. It weighs 64 pounds and folds for storage. This model suits small to medium lawns needing reliable side discharge.
- 21-inch cutting width for efficient coverage
- 140cc 4-stroke OHV engine for reliable power
- Self-propelled drive for easier maneuvering on slopes
- 6-position height adjustment from 1.5 to 3.9 inches
- 3-in-1 capability including side discharge and mulching
- 140cc engine displacement is lower than many competitors offering 170cc or 201cc
- Weighs 64 pounds, which is heavier than some push models
- Cutting height range tops out at 3.9 inches, limiting tall grass options
- You need side discharge for medium-sized lawns
- You want a self-propelled mower for uneven terrain
- You prefer a 21-inch cutting deck width
- You require a high-displacement engine over 170cc
- You prefer a lightweight push mower under 60 pounds
- You need a cutting height adjustment above 4 inches
Verdict: PowerSmart 21" 140cc Self-Propelled provides balanced performance for homeowners who prioritize side discharge and self-propelled ease over maximum engine power. It is a solid option for those with slopes and moderate lawn sizes.
SENIX 21-Inch Gas Self-Propelled Mower
Best for: small to medium yards needing side discharge
- Mowing Functions
- Mulching, Bagging, Side Discharge
- Cutting Width
- 21-inch
- Drive Type
- Self-propelled
- Motor Type
- 140 cc 4-Cycle Briggs & Stratton
- Height Adjustments
- 6-position (1.25-inch to 3.75-inch)
- Power Type
- Gas
This SENIX mower offers a 21-inch cutting width and a 140 cc Briggs & Stratton engine. It features self-propelled front-wheel drive and a 3-in-1 deck for side discharge, bagging, or mulching. The 6-position height adjustment ranges from 1.25 to 3.75 inches. It includes a 16-gallon bagger and weighs 55 pounds. You get reliable performance for small to medium yards with easy maintenance and a Prime N' Pull start system.
- 140 cc Briggs & Stratton 4-cycle engine for reliable power
- 21-inch cutting width handles small to medium yards
- 3-in-1 deck supports side discharge, bagging, and mulching
- 6-position height adjustment from 1.25 to 3.75 inches
- 140 cc engine displacement is lower than the 170 cc and 201 cc engines in other list options
- Single-speed self-propelled drive lacks the variable speed control found in some competitors
- 55-pound weight is heavier than typical 21-inch push mowers
- You need a dedicated side discharge option for your yard
- You prefer the reliability of a Briggs & Stratton engine
- You want a 3-in-1 mower that includes a bagger
- You require variable speed drive control for hilly terrain
- You need more than 140 cc of engine power
- You prefer a lighter mower under 50 pounds
Verdict: SENIX 21-Inch Gas Self-Propelled Mower fits homeowners with small to medium yards who value a trusted Briggs & Stratton engine and versatile side discharge capabilities over variable speed control.
Specifications side by side
| Spec | SENIX 22-Inch 170cc Self-Propelled Gas Mower | Worx 21-Inch 40V Cordless Push Lawn Mower | SENIX 21-Inch 170cc Self-Propelled Gas Mower | BILT HARD 21-Inch 201cc Self-Propelled Gas Mower | SENIX 21-Inch Self-Propelled Gas Mower | PowerSmart 22-Inch Gas Self-Propelled Lawn Mower | NovorikX 21-Inch 60V Self-Propelled Mower | PowerSmart 21-Inch 140cc Gas Push Mower | AMERISUN 21" Self-Propelled Gas Mower | SENIX 20-Inch 125cc Gas Push Lawn Mower | Worx 20-inch 40V 3-in-1 Mower | PowerSmart 21-Inch 140cc Self-Propelled Mower | SENIX 21-Inch Gas Self-Propelled Mower |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cutting Width | 22-inch | 21" | 21 in | 21" | 21 in | 22 in. | 21 in | 21" | 21 in | 20 inches | 20" | 21" | 21-inch |
| Drive Type | Self-propelled | Push | Self-propelled, FWD | Self-Propelled | Self-propelled, front-wheel drive | Self-propelled | Self-propelled | Push | Self-propelled | Push | push | Self-Propelled | Self-propelled |
| Voltage | – | 40V | – | – | – | – | 60 V | – | – | – | 40V | – | – |
| Battery Capacity | – | 5.0Ah | – | – | – | – | 2 x 5.0 Ah | – | – | – | 2 x 4.0Ah | – | – |
| Mowing Functions | 3-in-1 (mulching, discharge, bagging) | 3-in-1 | 3-in-1 (mulch, bag, side discharge) | 3-in-1 | 3-in-1 | 3-in-1 (mulch, bag, discharge) | 3-in-1 (mulch, bag, side discharge) | 3-in-1 (discharge, bagging, mulching) | 3-in-1 (mulch, bag, side discharge) | Side discharge | 3-in-1 (mulching, bagging, discharge) | 3-in-1 | 3-in-1 (mulching, discharge, bagging) |
| Motor Type | 170 cc 4-cycle OHV | Brushless | 170 cc 4-cycle OHV gas | 201cc 4-cycle OHV | 170cc 4-cycle OHV | 170cc 4-stroke OHV | 1200W brushless | 140cc Briggs&Stratton 4-stroke | 170cc 4-cycle OHV | 4-cycle gas | – | 4-stroke, OHV, single-cylinder | 140 cc 4-Cycle Briggs & Stratton |
| Height Adjustments | 6-position (1.25" to 4") | 7-position, 1.5" – 4" | 6 positions, 1.25-3.75 in | 8-position (1.2" to 3.75") | 6 positions, 1.25 to 3.75 inches | 6 positions (1.5" to 3.9") | – | 6 adjustments (1.5 to 3.9 inches) | 6 positions, 1.5-3.9 in | 5-position, 1.25 to 3.75 inches | 7 positions (1.5" to 4.25") | 6-position, 1.5 to 3.9 inches | 6-position (1.25-inch to 3.75-inch) |
| Power Type | Gas | Cordless | Gas | Gas | Gas | Gas | Cordless | Gas | Gas | Gas | Cordless | – | Gas |
| Engine Displacement | 170cc | – | 170cc | – | 170cc | 170cc | – | 140cc | 170cc | – | – | 140cc | 140cc |
| Application | – | 1/2 Acre | – | – | – | – | – | – | – | – | 1/2 Acre | – | – |
| Engine Stroke | – | – | – | – | – | – | – | 4-Stroke | – | – | – | – | – |
| Dimensions | 37.5 × 23.8 × 15.9 inches | 60 × 22 × 40.9 inches | 61 × 22.8 × 41.5 inches | – | 61 × 22.8 × 41.5 inches | 59.8 × 22.8 × 38.4 inches | 57.1 × 47.2 × 25.6 inches | 32.9 × 16.5 × 22.6 inches | 32.9 × 16.5 × 22.6 inches | 26.5 × 21.7 × 14 inches | 59.1 × 20.5 × 41.3 inches | 32.9 × 16.5 × 22.6 inches | 33 × 23 × 16 inches |
| Weight | 72.8 pounds | 55.6 pounds | 61.7 pounds | 89.2 pounds | 61.7 pounds | 75 pounds | 86 pounds | – | – | 49 pounds | 53.6 pounds | 64 pounds | 55 pounds |
| Size | 22INCH-170CC | – | 21 Inch-170cc-6 Position | 21 inch self propelled | 21-Inch Gas-Powered | 22 in. – 170 cc – Self Propelled | – | – | 3IN1 Self-Propelled Gas Lawn Mower | 20 inch 125 cc | 20" | – | 21-inch |
| Color | Blue | Black and Orange | Blue | – | Blue | Black | 2*5.0ah | Black | Black | BLACK+BLUE | Black and Orange | Black | Blue |
| Model | LSSG-H4 | WG752 | A025054-A | TMA-0562-N3-0513 | LSSG-M10-III | DB8622S | BLM160H-21SP | B8621P | AV8621S1 | LSPG-L3 | WG751.3 | B8621SXC | LSSG-M9 |
If you want full spec rankings, our guide to the best side discharge lawn mowers compares each model directly.
How We Picked Side Discharge Mowers
We found these 13 mowers by scanning Amazon listings for the side discharge function. You will only see one size or variant from each product family. All details come from the specifications published on the listings. We do not test products physically. We only include models where the listing explicitly states this mowing function in the title or feature list. We never quote customer reviews or invent specs. We never mention prices or dollar amounts. Prices are shown live on the page.
The products are ordered by availability first. Then we sort by the listing's overall rating weighted by the number of ratings. Finally, we consider how many guide criteria the specs meet. This ensures you see the most relevant side discharge mowers first. We explain what each spec means in practice so you can compare them strictly by their published data.
How to choose the right one
Check cutting width
The cutting width determines how many passes you need to cover your lawn. Wider decks cut more grass per stroke, reducing total mowing time. The SENIX 22-Inch Gas Self-Propelled Mower offers a 22-inch deck, which covers more ground than the 20-inch SENIX 20-Inch 125cc Gas Push Lawn Mower. If you have a large, open yard, a wider deck helps you finish faster. For tighter spaces or smaller lawns, a narrower 20-inch or 21-inch deck may be easier to maneuver around obstacles. Match the width to your yard size and storage constraints.
Select power type
Power type defines how the mower operates and what maintenance it requires. Gas mowers provide consistent power and do not depend on battery charge levels. The BILT HARD 21-Inch 201cc Self-Propelled Gas Mower uses a 201cc engine for strong performance without cords or batteries. Cordless models like the Worx 21-Inch 40V Cordless Push Lawn Mower offer quieter operation and zero emissions. Choose gas if you prefer raw power and longer runtimes without charging. Choose cordless if you want lower maintenance and cleaner operation for smaller to medium yards.
Compare drive type
Drive type affects how much effort you use while mowing. Self-propelled mowers move forward on their own, reducing fatigue on slopes or larger lawns. The SENIX 21-Inch 170cc Self-Propelled Gas Mower helps you push less weight. Push mowers require you to provide all the forward momentum. The PowerSmart 21-Inch 140cc Gas Push Mower is lighter and simpler but demands more physical effort. If your yard has hills or is larger than a third of an acre, self-propelled is more efficient. For small, flat lawns, a push model may suffice.
Evaluate voltage
Voltage indicates the power level of cordless mowers. Higher voltage generally means more torque and better performance in thick grass. The NovorikX 21-Inch 60V Self-Propelled Mower uses a 60V system, offering robust power for larger lawns. The Worx 21-Inch 40V Cordless Push Lawn Mower uses a 40V system, suitable for half-acre lawns. If you have dense turf or a larger yard, a 60V system may handle the load better. For smaller yards with moderate grass, 40V models provide adequate power with lighter weight.
Check battery capacity
Battery capacity determines how long a cordless mower runs on a single charge. Measured in amp-hours (Ah), higher numbers mean longer runtime. The NovorikX 21-Inch 60V Self-Propelled Mower includes 5.0 Ah batteries, supporting extended mowing sessions. The Worx 20-inch 40V 3-in-1 Mower uses a 4.0 Ah battery, which is sufficient for smaller areas. If you have a large lawn, ensure the battery capacity matches your needs to avoid mid-job recharging. For small yards, a 4.0 Ah battery often provides enough runtime to complete the task.
Frequently asked questions
Which self-propelled mower offers the widest cutting path for side discharge?
The SENIX 22-Inch 170cc Self-Propelled Gas Mower provides a 22-inch cutting width. This wider deck covers more grass per pass than the 20-inch or 21-inch models. It is ideal for small to medium yards where you want to reduce mowing time. The 170 cc engine supports efficient clippings ejection to the side.
Can I use side discharge on a cordless battery mower?
Yes, several cordless models support side discharge. The Worx 21-Inch 40V Cordless Push Lawn Mower includes side discharge as part of its 3-in-1 function. The NovorikX 21-Inch 60V Self-Propelled Mower also offers this mode. You can direct clippings away from flower beds or paths using these battery-powered options.
Which mower is best for pushing manually on small lawns?
The PowerSmart 21-Inch 140cc Gas Push Mower is designed for manual operation. It lacks self-propulsion, making it lighter and easier to store. It features a 21-inch cutting width and side discharge capability. This model suits homeowners with small, flat yards who do not need extra propulsion power.
Does side discharge work well on uneven terrain?
Side discharge functions effectively on uneven terrain if the mower has self-propelled drive. The PowerSmart 22-Inch Gas Self-Propelled Lawn Mower is noted for rear-wheel traction on uneven lawns. Its 22-inch deck and self-propelled drive help maintain consistent cutting height. This ensures clippings are ejected evenly even on slopes.
How much battery capacity do cordless side discharge mowers have?
Cordless models in this list feature 4.0 Ah or 5.0 Ah batteries. The Worx 21-Inch 40V model includes a 5.0 Ah battery. The NovorikX 21-Inch 60V model also uses 5.0 Ah batteries. These capacities support extended runtime for side discharge tasks on lawns up to half an acre.
What is the lightest gas mower with side discharge?
The SENIX 20-Inch 125cc Gas Push Lawn Mower weighs 49 pounds. It is the lightest option in this comparison. Its compact size and lower weight make it easy to maneuver. It provides side discharge for small yards without the bulk of heavier self-propelled models.
Are there gas mowers with Briggs & Stratton engines for side discharge?
The SENIX 21-Inch Gas Self-Propelled Mower features a Briggs & Stratton engine. It offers side discharge along with mulching and bagging functions. This model provides reliable power for small to medium yards. The 140 cc engine ensures consistent performance for grass clippings management.
