Comparison: Best Gas Lawn Mower Mulcher (Updated | Oct 14th)
When maintaining a healthy, vibrant lawn, a reliable gas lawn mower mulcher can make all the difference. Designed to finely chop grass clippings and return nutrients to the soil, these machines offer efficiency and eco-friendly benefits. This comparison explores top-performing models, evaluating factors like power, durability, ease of use, and mulching performance. Whether you’re managing a small yard or a larger landscape, our goal is to help you find a mower that balances performance, value, and environmental care—ensuring cleaner, greener results with every cut.
Editor’s Choice
Best for a specific purpose
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Best for premium build:
PowerSmart 21" 3-in-1 Gas Push Lawn Mower with 140cc 4-Stroke Engine – Wide Cutting Deck -
Best for durable deck:
PowerSmart Gas Lawn Mower 21-Inch 144cc OHV Engine 3-in-1 Push Mower with Bagging -
Best for maneuverability:
21" Steel Deck Gas Lawn Mower -
Best for time saver:
PowerSmart Gas Push Lawn Mower 21-inch 144cc 4-Stroke Engine with Easy Adjustable Cutting Height -
Best for best overall:
BILT HARD 21 Inch Lawn Mower Gas Powered -
Best for best budget:
YARDMAX 21 in. 170cc 3-in-1 Gas Walk Behind Push Lawn Mower with High Rear Wheels -
Best for cordless option:
WEN 20V Max 2-in-1 19-Inch Cordless Brushless Lawn Mower and Mulcher with Two 5Ah Batteries and Dual Port Charger (20839) -
Best for self-propelled:
AMERISUN 21-Inch 3-in-1 Gas Lawn Mower -
Best for budget pick:
PowerSmart 21 in. Gas Lawn Mower with 144cc OHV Engine -
Best for compact design:
SENIX 20" Gas Lawn Mower
Product Comparison: Best Gas Lawn Mower Mulcher
Premium build
PowerSmart 21" 3-in-1 Gas Push Lawn Mower with 140cc 4-Stroke Engine – Wide Cutting Deck, 6 Height Adjustments, Mulching Capability
PowerSmart
- High-Performance 140cc Engine – Experience powerful and efficient mowing with our 140cc 4-stroke engine, designed for superior torque and minimal maintenance—no oil and gas mixing required!
- Versatile 3-in-1 Cutting System – Tackle any yard with the 3-in-1 functionality that lets you choose between side discharge, rear bagging, and mulching, ensuring your lawn looks its best in every season.
- Wider 21" Cutting Deck – Maximize your mowing efficiency with a spacious 21" cutting deck, allowing you to cover more ground in less time with precision and ease.
- 6-Height Adjustments for Custom Cuts – Customize your lawn's appearance with 6 adjustable cutting heights, ranging from 1.5 to 3.9 inches, ensuring a professional and consistent cut every time.
- Rugged and Durable Design – Built to withstand the test of time, this mower features a sturdy steel deck and a reliable frame, ensuring peak performance and a long service life for all your landscaping needs.
Durable deck
PowerSmart Gas Lawn Mower 21-Inch 144cc OHV Engine 3-in-1 Push Mower with Bagging
PowerSmart
- Gas Powered Engine: A 144cc 4-cycle OHV engine equipped with recoil starter and auto choke for easy start, delivers strong power.
- 3-in-1 Steel Deck: All-steel deck built to last, combine mulching, bagging, and side-discharging capabilities in 1.
- 21" Cutting Blade: The heavy-duty blade delivers better cutting effect, allowing you to mow more in less time.
- Cutting Height Adjust: Dual-lever height adjustment with 6 cutting positions allows you to choose your cut from 1.5" to 3.9".
- Easy to Assemble: Foldable design saves 70% storage space, making it more convenient to unfold and use.
Maneuverability
21" Steel Deck Gas Lawn Mower, 3-in-1 Push Mower, 144cc 4-Stroke OHV Engine, 6 Height Adjustment, 1.4 Bushel Grass Catcher with Bagging, Mulching & Side Discharge Efficient for Yard Garden
AMERISUN
- POWERFUL 144CC 4-STROKE ENGINE- Powered by a 144cc 4-cycle OHV engine, this gas lawn mower starts effortlessly thanks to its auto choke system, while the forced air-cooling mechanism keeps it running efficiently for long-lasting use—an excellent pick for those seeking a dependable lawn mower gas powered option
- HEAVY-DUTY 21" STEEL CUTTING DECK- A clean, even cut is delivered every time by the 21-inch heavy-duty blade and reinforced steel deck, allowing you to finish faster—exactly what you’d expect from a high-performance lawnmower or gas push mower
- EFFORTLESS MANEUVERING WITH LARGE WHEELS- Designed with 7-inch front wheels and 10-inch high rear wheels, plus 1.5" wide treads and double ball bearings, this push mower makes maneuvering simple and effective, even across uneven ground.
- 6 ADJUSTABLE CUTTING HEIGHT- You can switch between six cutting heights—from 1.5 inches to 3.9 inches high—with a single lever, giving this lawn mower gas model the flexibility to meet different yard needs in every season
- 3-IN-1 VERSATILITY- BAG, MULCH, & SIDE DISCHARGE – Easily switch between rear bagging, mulching, and side discharge. The 1.4-bushel grass catcher allows easy grass collection, keeping your lawn clean and tidy
- NO INSTALL& FOLDABLE STORAGE- With no tools required, this fully assembled gas lawn mower just needs its handle unfolded before it’s ready to go—and it folds right back down for easy storage, ideal for those browsing gas lawn mowers clearance or space-saving solutions
Time saver
PowerSmart Gas Push Lawn Mower 21-inch 144cc 4-Stroke Engine with Easy Adjustable Cutting Height, High Wheels, 2-in-1 with Mulching, Rear Bagger
PowerSmart
- Powerful Engine: Powered by 144cc 4-stroke engine, with auto choke system for easy start, and forced air-cooling system ensures smooth operation and long-lasting performance.
- Cutting Performance: The 21-inch heavy-duty blade provides ultra-fine cuts, and the small clippings help maintain a healthy lawn.
- Time Saver: Great mowing effect in a single pass, even on thick grass, allowing you to cover more ground with fewer passes.
- Bagging Collection: The 1.4-bushel rear bag collects more clippings for easy clean up or composting, is easy to empty, saving you time and effort.
- Adjustable Cutting Height: Durable steel deck with single-lever, 6-position height adjustment makes it easy to change cutting heights from 1.5 in. to 3.9 in.
Best overall
BILT HARD 21 Inch Lawn Mower Gas Powered, 4-Cycle 201cc Engine, 3-in-1 Push Lawnmower with Bagging, Mulching & Side Discharge, Adjustable 8-Positions Cutting Height, Easy Start
BILT HARD
- Powerful Engine – Featuring a robust 201cc 4-stroke OHV engine that delivers 9.0 ft.lb of torque, this gas powered lawn mower ensures efficient and reliable performance every time.
- Efficient & Versatile Mowing – Our 21-inch lawn mower features 3-in-1 steel deck with mulching, side discharge and rear bagging and provides an extensive mowing path for efficiency. No choke, no primer single-pull start design, easy to operate.
- Adjustable Cutting Height – Offering a single lever four-wheel synchronized height adjustment from 1.2" to 3.75", this lawn mower lets you customize the mowing height to perfectly match your lawn requirements.
- Comfortable Mowing Experience – Equipped with 9.5" rear and 8" front double ball-bearing wheels for smooth and effortless movement, as well as a comfortable foam-wrapped angled grip that eliminates hand fatigue, making your lawn maintenance a breeze.
- Warranty – BILT HARD is committed to providing our customers with high-quality products and exceptional customer service. We stand behind our lawn mower. If you have any questions or are not satisfied, please feel free to contact us via Amazon email or our official website.
Best budget
YARDMAX 21 in. 170cc 3-in-1 Gas Walk Behind Push Lawn Mower with High Rear Wheels
YARDMAX
- Single-lever deck adjustment for quickly setting your mow height
- MAXFlow Deck Technology – volute spiral deck design for better airflow and mulching
- Heavy-duty, 16-guage stamped steel deck
- Durable, one-piece seamless steel deck reduces vibration
- Seven cutting heights from 1.25″ to 3.75″
Cordless option
WEN 20V Max 2-in-1 19-Inch Cordless Brushless Lawn Mower and Mulcher with Two 5Ah Batteries and Dual Port Charger (20839)
WEN
- Brushless motor provides better performance, a longer lifespan, and less maintenance than brushed alternatives
- 2-in-1 operation doubles as both a lawn mower and a mulcher with five quick-adjust height settings ranging from 1.5 to 3.2 inches
- 5.0 amp-hour lithium-ion battery with onboard LED charge gauge delivers consistent power at any charge level, and is compatible with the entire WEN 20V Max Cordless Power Tool series
- Cuts lawns up to 10,300 square feet (roughly 1/4-acre) on a single charge with the two included 5Ah batteries (actual runtime of 30 to 68 minutes dependent on grass conditions and cutting height)
- Includes a collapsible handle for easy upright storage, a 13-gallon collection bag, a mulching plug, a 19-inch deck, a 17-inch cutting blade, two 20V Max li-ion 5Ah batteries, a 20V Max dual port charger, and a two-year warranty
Self-propelled
AMERISUN 21-Inch 3-in-1 Gas Lawn Mower, Self Propelled with 170cc 4-Stroke Engine, 6-Position Adjustable Cutting Height, Side Discharge, Mulching & Rear Bag, High-Wheel Push Mower for Yard & Garden
AMERISUN
- POWERFUL 170CC 4-STROKE OHV GAS ENGINE – This self propelled gas lawn mower is built for strength and efficiency, providing reliable starting and consistent power to cut through tall, thick grass in medium and large yards.
- 21-INCH CUTTING DECK WITH 3-IN-1 FUNCTION – Versatile lawn mower design supports side discharge, mulching, and rear bag collection, making it the perfect push mower for yard, garden, and landscaping maintenance.
- SELF PROPELLED DRIVE WITH HIGH-WHEEL DESIGN – Large 10-inch rear wheels and 7-inch front wheels make this gas powered lawn mower self propelled easy to maneuver across uneven terrain, hills, and slopes.
- 6-POSITION ADJUSTABLE CUTTING HEIGHT (1.5”-3.9”) – Customize your cut with this 21-inch gas lawn mower by quickly switching between 6 height settings, ensuring a clean and professional finish for every season.
- DURABLE, FOLDABLE & EASY ASSEMBLY – Built with a heavy-duty steel deck for long-lasting performance; includes a 1.4-bushel grass catcher to reduce emptying trips; the foldable handle design allows compact storage, while the quick and simple assembly makes this self propelled push mower with bag ready to use in minutes.
Budget pick
PowerSmart 21 in. Gas Lawn Mower with 144cc OHV Engine, 2-in-1 Push Mower with Mulching & Side-Discharge
PowerSmart
- High Efficiency: Equipped with a high-performance 144cc 4-stroke OHV engine and a auto choke for easy starter, delivers reliable power and efficiency.
- 2-IN-1 Steel Deck: All-steel deck built to last, combine mulch and side-discharge capabilities.
- 21" Blade: The 21" heavy-duty cutting blade delivers better cutting effect, allowing you to mow more in less time.
- Adjustable Cutting Height: 6-positions dual-lever height adjustment allows you to choose your cut from 1.5" to 3.9".
- Easy to Store: Compact design saves 70% storage space, making it more convenient to unfold and use.
- High Rear Wheels: Durable 10-inch rear wheels and 7-inch front wheels are designed for easy, smooth mowing with less efforts.
Compact design
SENIX 20" Gas Lawn Mower, 144 cc Gas Powered Lawnmower, 4-Cycle Engine Walk-Behind Push Lawn Mowers, 3 Position Height Adjustment for Yard and Garden, cortadora de pasto (LSPG-L4)
SENIX
- 【4QL Powerful Engine】144CC 4QL gas engine with more explosive power, lawn and slope operation in one go, efficiently complete large mowing tasks and enhance the mowing experience.
- 【7"/7" Wheel Design】Front 7-inch and rear 7-inch wheel design greatly improves the passability of rugged terrain, from short lawn to rugged slopes can be easily dealt with, adapting to a variety of terrains.
- 【20 inch Cutting Width】The 20-inch mower effectively increasing the area covered in a single operation and dramatically improving operational efficiency compared to 16-inch
- 【3 Position Cutting Height Adjustable 】3 levels of mowing height adjustment, from 1.35 inches to 2.3 inches to 3.15 inches, to adapt to various grass heights. You can adjust the height as needed to make your mowing easier.
- 【Quick Installation & Warranty】According to the instruction manual, you can easily install. Gas lawn mowers are covered by a warranty within 2-year that gives you peace of mind after the sale.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Buying Guide
FAQs
Which gas lawn mower mulcher has the most powerful engine?
BILT HARD 21 Inch Lawn Mower Gas Powered has a 201cc engine, the most powerful among the listed models.
Are any of these gas lawn mowers self-propelled?
AMERISUN 21-Inch 3-in-1 Gas Lawn Mower is self-propelled.
Which models offer a 3-in-1 mulching, bagging, and side-discharge feature?
All gas models except WEN 20V Max (cordless) and PowerSmart 21 in. Gas Lawn Mower (2-in-1) are 3-in-1.
What is the largest cutting width available?
All gas models except WEN 20V Max have a 21-inch cutting width; WEN is 19 inches.
Which gas mulching mower has the highest rear wheel drive?
YARDMAX 21 in. 170cc model features a high rear wheel design for better performance.
Do any models include adjustable cutting height?
PowerSmart Gas Push Lawn Mower 21-inch 144cc includes easy-adjust cutting height settings.
Which gas mulcher is best for small yards?
SENIX 20"Gas Lawn Mower is ideal for smaller yards due to its compact 20-inch deck.
