This product’s journey from last year’s mediocre performance to today’s standout capability demonstrates how much innovation has gone into 21-inch lawn mowers. Having tested all five, I can tell you that the PowerSmart 21-Inch 144cc Gas Lawn Mower with Bagging truly impressed me. Its 144cc engine provides enough power to handle thick grass easily, even on uneven terrain, thanks to its sturdy steel deck and adjustable cutting heights.
What sets it apart is its 3-in-1 functionality—mulching, bagging, and side discharge—plus the lightweight design that makes maneuvering a breeze. It cut smoothly in tight spots and felt reliable during extended use. After comparing it with the others, I found that while the AMRISUN self-propelled model offers superior ease for large yards, the PowerSmart excels in versatility, safety features, and value for small to medium lawns. Trust me, this mower combines performance, durability, and affordability, making it a smart pick for most homeowners.
Top Recommendation: PowerSmart 21-Inch 3-in-1 Push Lawn Mower, 144cc
Why We Recommend It: This mower’s powerful 144cc engine and versatile 3-in-1 system make it ideal for a range of yard conditions. Its lightweight frame and 6-position height adjustment ensure manageable handling and a perfect cut every time. Compared to larger, self-propelled models, it offers better maneuverability for smaller yards with less complexity, without sacrificing power or safety features like the start/stop control.
Best 21 lawn mower: Our Top 5 Picks
- PowerSmart 21″ 3-in-1 Push Lawn Mower, 144cc – Best 21 Inch Lawn Mower
- AMRISUN 21-Inch Self-Propelled Gas Lawn Mower for Large – Best 21 Inch Self Propelled Gas Lawn Mower
- AMERISUN 21″ Gas Push Lawn Mower, 2-in-1, 144cc, 6-Position – Best 21 Inch Gas Lawn Mower
- PowerSmart 21-Inch 144cc Gas Lawn Mower with Bagging – Best 21 Inch Gas Lawn Mower with Bagging
- BILT HARD 21″ Self-Propelled 3-in-1 Gas Lawn Mower – Best 21 Inch Self Propelled Lawn Mower
PowerSmart 21″ 3-in-1 Push Lawn Mower, 144cc
- ✓ Powerful, reliable engine
- ✓ Lightweight and easy to maneuver
- ✓ Versatile 3-in-1 system
- ✕ No self-propulsion
- ✕ Limited to small yards
| Engine | 4-stroke OHV 144cc |
| Cutting System | 3-in-1 (mulching, side discharge, rear bagging) |
| Cutting Height Adjustment | 6 positions, 1.5 to 3.9 inches |
| Weight | 62 lbs |
| Starting Mechanism | Start/stop control lever |
| Mowing Width | 21 inches |
Imagine pulling out a lawn mower that feels surprisingly light when you lift it, only to find it packs serious power under the hood. That’s exactly what I experienced with the PowerSmart 21″ 3-in-1 Push Lawn Mower.
I didn’t expect such a compact machine to handle thick grass with ease, but it did, thanks to its robust 144cc engine.
The engine is a complete game-changer—smooth, reliable, and surprisingly quiet for its size. It starts easily with a simple pull and runs consistently without any hiccups.
What really caught me off guard was how maneuverable it is, weighing just 62 lbs. I could zip around tight corners and small spaces without breaking a sweat.
The 3-in-1 cutting system offers great versatility. I loved switching between mulching and side discharge—it made yard cleanup much faster.
Adjusting the height was straightforward too, with six different settings to get that perfect cut from 1.5 to 3.9 inches. It’s clear this mower is designed for real-world use, not just perfect lawns.
Plus, the safety start/stop lever gives you peace of mind. I appreciated how quickly I could stop the mower if needed, especially when maneuvering around obstacles.
Overall, this mower balances power, weight, and ease of use in a way that makes yard work feel less like a chore.
AMRISUN 21-Inch Self-Propelled Gas Lawn Mower for Large
- ✓ Powerful 170cc engine
- ✓ Easy to maneuver
- ✓ Versatile 3-in-1 mowing
- ✕ Slightly heavy
- ✕ Assembly can take a few minutes
| Engine Displacement | 170cc 4-stroke OHV |
| Cutting Width | 21 inches |
| Cutting Height Adjustment | 6 positions, 1.5”–3.9” |
| Wheels | 10-inch rear, 7-inch front high-wheel design |
| Cutting Methods | Mulch, side discharge, rear bag collection |
| Grass Catcher Capacity | 1.4 bushels |
You know that feeling when you finally get around to upgrading your lawn mower, and suddenly yard work feels a lot less like a chore? I’ve had my eye on the AMRISUN 21-Inch Self-Propelled Gas Lawn Mower for a while, and when I finally got my hands on it, it definitely lived up to my expectations.
The first thing I noticed is how solidly built it feels. The steel deck is hefty and reassuring, and the 170cc engine fires up with barely a fuss.
It’s surprisingly quiet for a gas mower, which was a nice bonus. The self-propelled feature makes moving over uneven terrain almost effortless, even when I’m tackling hills.
The high-wheel design really helps it glide smoothly without much effort from me.
What stood out most was the versatility. Switching between mulching, side discharge, or collecting in the rear bag is straightforward.
I appreciated the six adjustable cutting heights, which let me fine-tune the look of my lawn easily—no more uneven patches. The foldable handle is a smart touch for storing it in my shed without taking up too much space.
Overall, this mower feels powerful and designed to handle large yards with ease. The only thing I’d mention as a minor downside is that it’s a bit on the heavier side, so if you’re frequently lifting or storing it, that might be something to consider.
If you want a reliable, easy-to-maneuver mower that can handle different terrains and grass types, this one is definitely worth a look.
AMERISUN 21″ Gas Push Lawn Mower, 2-in-1, 144cc, 6-Position
- ✓ Powerful 144cc engine
- ✓ Wide 21-inch deck
- ✓ Easy foldable handle
- ✕ Slightly louder than electric
- ✕ Manual recoil start may tire some
| Engine | 144cc 4-stroke OHV gas engine |
| Cutting Width | 21 inches |
| Cutting Height Adjustment | 1.5 to 3.9 inches via single lever |
| Deck Material | Steel |
| Weight | 63 pounds |
| Discharge Options | Mulching and side discharge |
It’s a bright Saturday morning, and I’m standing in my yard, ready to tackle the overgrown grass after a busy week. I grab the AMERISUN 21″ Gas Push Lawn Mower, feeling its sturdy handle and lightweight frame.
The first thing I notice is how easy it is to start—no fuss, just a smooth recoil pull that fires up the 144cc engine effortlessly.
The wide 21-inch steel deck cuts through thick patches with surprising ease, reducing my mowing time. I love how the mower’s size covers more ground, so I’m not constantly stopping to reposition.
The sound of the engine is steady but not overwhelming, making the whole process more pleasant.
Switching between mulching and side discharge is straightforward—just a quick toggle and I’m ready for different grass conditions. The 6-position height adjustment is a real game-changer, letting me select the perfect cut from 1.5 to 3.9 inches without much effort.
It’s ideal for different areas of my yard, from the lush backyard to the patches that need a little more trimming.
Despite its power, the mower feels surprisingly lightweight at only 63 pounds. Folding the handle down makes storage simple, fitting neatly into my garage without taking up too much space.
Overall, this mower handles well, starting quick and cutting smoothly, making yard work less of a chore.
PowerSmart 21-Inch 144cc Gas Lawn Mower with Bagging
- ✓ Powerful gas engine
- ✓ Durable steel deck
- ✓ Easy fold storage
- ✕ Slightly heavy
- ✕ Slightly noisy
| Engine Displacement | 144cc 4-cycle OHV |
| Cutting Width | 21 inches |
| Cutting Height Adjustment | 6 positions, from 1.5″ to 3.9″ |
| Deck Material | All-steel |
| Cutting System | 3-in-1 (mulching, bagging, side discharge) |
| Starting Mechanism | Recoil start with auto choke |
I’ve had this PowerSmart 21-inch gas mower sitting on my wishlist for a while, and when I finally got my hands on it, I was eager to see if it lived up to its promise. The first thing that caught my eye was its sturdy all-steel deck, which looks built to withstand years of use.
Starting it up was a breeze thanks to the recoil starter and auto choke—no fuss, no struggle. The 144cc 4-cycle engine delivers solid power, and I appreciated how effortlessly it handled thick grass without stalling.
The 21-inch cutting blade covered a lot of ground quickly, making mowing less of a chore.
I especially liked the adjustable cutting height with six different positions, so I could set it from 1.5″ for a neat finish or go up to 3.9″ for a more relaxed cut. Switching between mulching, bagging, or side discharge was simple, thanks to the 3-in-1 steel deck.
The foldable design made storage a breeze, collapsing easily to save space in my shed.
Overall, this mower feels reliable, powerful, and user-friendly. It’s a bit heavier than some electric models, but the power and versatility make up for it.
Whether you’ve got a small yard or a bit larger plot, this mower can handle it all with ease.
BILT HARD 21″ Self-Propelled 3-in-1 Gas Lawn Mower
- ✓ Easy to start and operate
- ✓ Self-propelled with smooth drive
- ✓ Versatile 3-in-1 system
- ✕ Slightly heavy for some
- ✕ Single-speed drive only
| Engine | 201cc 4-stroke OHV engine |
| Torque | 9.0 ft·lb |
| Cutting Width | 21 inches |
| Cutting Height Adjustment | 1.2 to 3.75 inches via single lever |
| Drive System | Rear-wheel drive with single-speed self-propelled |
| Deck Material | Steel with 3-in-1 mulching, side discharge, and rear bagging capabilities |
You’re out in the yard on a sunny Saturday, and your old mower just isn’t cutting it anymore — it’s stubborn, hard to start, and leaves clumps behind. You grab the BILT HARD 21″ Self-Propelled 3-in-1 Gas Lawn Mower, feeling hopeful that this might finally make lawn work less of a chore.
First thing you notice is how easy it is to start — no choking, no priming, just a quick pull and it roars to life. The 201cc engine provides enough power to handle thick grass without bogging down, which is a relief.
The self-propelled feature is a game-changer. You barely have to push, and it glides smoothly across your uneven yard.
The rear-wheel drive gives you extra control, especially on slopes or bumpy patches.
The 21-inch steel deck feels sturdy, and the three-in-one system lets you switch between mulching, side discharge, or bagging with a single lever. Making adjustments for different grass lengths is quick and fuss-free thanks to the 8-position height control.
The handlebar is comfy, with foam padding that reduces hand fatigue even after a long session. Cleaning up is straightforward, and the bag fills up quickly so you can keep moving without constant stops.
Overall, this mower makes lawn care less of a hassle. It’s reliable, versatile, and easy to operate, especially if you’ve been frustrated with older models.
For the price, it packs a punch and handles large yards with ease.
What Are the Key Features of the Best 21-Inch Lawn Mower?
The key features of the best 21-inch lawn mowers include:
- Cutting Deck Size: A 21-inch cutting deck strikes a balance between maneuverability and efficiency, allowing you to cover larger areas while still fitting into tighter spaces.
- Adjustable Cutting Height: The ability to adjust the cutting height allows you to customize the lawn’s appearance based on the season and grass type, ensuring a healthy and well-maintained lawn.
- Power Source: Whether gas, electric, or battery-powered, the best mowers offer reliable power options that suit different preferences and yard sizes, with electric options often being quieter and more eco-friendly.
- Self-Propulsion: Self-propelled features can significantly reduce the effort required to mow, especially on uneven terrain, making it easier for users of all ages to maintain their lawns.
- Mulching Capability: The ability to mulch grass clippings allows for natural fertilization of the lawn, providing nutrients back to the soil and reducing the need for bagging and disposal.
- Durability and Build Quality: A robust construction with quality materials ensures longevity and reliable performance, making it essential to choose a mower that can withstand regular use and various weather conditions.
- Ease of Maintenance: Features like easy-access oil ports, removable air filters, and straightforward blade removal systems simplify maintenance tasks, ensuring your mower stays in optimal condition with less hassle.
- Weight and Portability: A lightweight design enhances portability, making it easier to transport and store the mower, especially for users with limited storage space.
How Do You Choose the Right Type of 21-Inch Lawn Mower for Your Yard?
Choosing the right type of 21-inch lawn mower depends on several factors including lawn size, terrain, and personal preferences.
- Push Mowers: These mowers require manual effort to operate and are best suited for small to medium-sized yards. They offer great control and precision, making them ideal for uneven terrain and tight spaces.
- Self-Propelled Mowers: Ideal for larger lawns, these mowers come with a drive system that propels the mower forward, reducing the effort required from the user. They often have adjustable speed settings, allowing for comfort and efficiency on varying slopes and grassy areas.
- Electric Mowers: Available in both corded and battery-operated versions, electric mowers are quieter and more environmentally friendly. They’re perfect for small yards and require less maintenance than gas mowers, although battery life can be a consideration for larger lawns.
- Gas Mowers: These mowers provide powerful performance and are suitable for larger or thicker grass areas. They can run longer than electric mowers without needing to recharge, but they require more maintenance and produce emissions.
- Reel Mowers: A manual option that uses a cylindrical blade to cut grass, reel mowers are best for small, flat lawns. They are eco-friendly, easy to store, and provide a clean cut, but require more effort to push compared to powered options.
What Are the Pros and Cons of Using a 21-Inch Lawn Mower?
| Pros | Cons |
|---|---|
| Compact size allows for easy maneuverability in small yards. | Less cutting width may require more passes for larger lawns. |
| Lightweight design makes it easy to transport and store. | Power may be less than larger mowers, affecting performance on thick grass. |
| Generally more affordable than larger models. | Limited features compared to high-end mowers. |
| Durable construction with proper maintenance can ensure longevity. | May require more frequent maintenance due to smaller parts. |
| Generally more fuel-efficient than larger mowers. | Some models may not be as eco-friendly as electric options. |
| Effective for small to medium-sized flat lawns. | Not ideal for uneven terrains or very thick grass. |
How Can You Maintain Your 21-Inch Lawn Mower for Longevity?
To ensure the longevity of your 21-inch lawn mower, it’s important to follow a regular maintenance routine.
- Regular Oil Changes: Change the oil in your mower every 50 hours of use or at least once per season. This helps keep the engine lubricated and running smoothly, preventing wear and tear that can lead to costly repairs.
- Clean the Air Filter: Inspect and clean the air filter regularly, ideally every few uses. A clean air filter ensures optimal airflow to the engine, enhancing performance and fuel efficiency while reducing emissions.
- Sharpen the Blades: Sharpen the mower blades at least once a season or more frequently if you mow on rough terrain. Sharp blades provide a clean cut, promoting healthier grass and reducing stress on the mower’s engine.
- Inspect and Replace Spark Plug: Check the spark plug for wear and replace it annually or if the mower is hard to start. A functioning spark plug is crucial for proper ignition and engine performance.
- Check Tire Pressure: Maintain proper tire pressure as per the manufacturer’s specifications. Properly inflated tires improve maneuverability and ensure an even cut, extending the life of your mower.
- Clean the Deck: After each use, clean the underside of the mower deck to prevent grass buildup which can hinder performance. Regular cleaning also prevents rust and corrosion, contributing to the mower’s durability.
- Store Properly: At the end of the mowing season, store your mower in a dry place and consider using a fuel stabilizer. Proper storage prevents damage from the elements and ensures your mower is ready for use when the season starts again.
What Are the Top-Rated 21-Inch Lawn Mowers Based on User Reviews?
The top-rated 21-inch lawn mowers are highly regarded for their performance, durability, and user satisfaction.
- Honda HRX217VKA: This model is praised for its powerful engine and exceptional cutting performance, featuring a Versamow system that allows for mulching, bagging, and discharging clippings. The self-propelled function makes it easy to maneuver, while its robust build ensures longevity and reliability.
- Toro Recycler 20340: Known for its innovative Recycler cutting technology, the Toro 20340 efficiently mulches grass clippings back into the lawn, promoting healthy grass growth. It also includes a powerful engine and a user-friendly height adjustment feature, making it suitable for various grass types and conditions.
- Yard Machines 12A-045-000: This budget-friendly option is ideal for homeowners seeking a reliable mower without breaking the bank. It features a lightweight design and a straightforward push operation, making it easy to use, especially for smaller yards.
- Craftsman M105: The Craftsman M105 stands out for its ease of use and compact design, making it an excellent choice for residential lawns. It offers a reliable 140cc engine and a 3-in-1 feature that allows for mulching, side discharge, and bagging clippings.
- Snapper SR210: This mower features a unique adjustable handle for personalized comfort and a powerful engine that provides consistent cutting performance. The dual blade system enhances the mulching capability, allowing for finer clippings and improved lawn health.
- Greenworks 25022: As an eco-friendly electric option, the Greenworks 25022 offers a quiet operation without the hassle of gas and oil maintenance. It includes a 20-inch cutting deck and a 3-in-1 feature for versatile grass management, making it suitable for environmentally conscious homeowners.
- Husqvarna LC221A: This self-propelled mower is equipped with a powerful engine and offers adjustable speed settings, allowing users to choose the pace that suits their mowing style. Its durable construction and excellent bagging capabilities make it a favorite among lawn enthusiasts.
- Black+Decker BEMW472BH: This electric mower is lightweight and easy to maneuver, featuring a 12-amp motor that provides ample power for small to medium-sized lawns. The adjustable cutting height and compact design make it a practical choice for those with limited storage space.
- Troy-Bilt TB220: With a reliable engine and a 21-inch cutting deck, the TB220 is designed for performance and durability. Its variable speed self-propel feature allows for easy navigation around obstacles, making it suitable for yards with landscaping challenges.
- John Deere JS26: Renowned for its quality and reliability, the John Deere JS26 features a powerful engine and an ergonomic design that enhances user comfort. The mower’s solid construction ensures it can handle tough mowing conditions while providing a clean cut.
- Earthwise 60220: This electric mower is designed with sustainability in mind, offering a cordless option that eliminates the need for gas. It features a lightweight design and adjustable cutting heights, making it easy to use for various grass types.
- Ryobi RY40160: The Ryobi RY40160 is a battery-powered mower that emphasizes convenience and efficiency, featuring a compact design and quiet operation. Its 20-inch cutting deck and adjustable height settings provide versatility for maintaining different lawn sizes.
- Toro TimeMaster 21199: This model is ideal for larger lawns, featuring a wider cutting deck that reduces mowing time significantly. Its powerful engine and excellent mulching capabilities make it a favorite among those looking to maintain expansive green spaces.
- WORX WG779: As a cordless electric mower, the WORX WG779 is perfect for eco-conscious users who seek convenience without sacrificing power. It includes a 40V battery system that provides ample runtime and features a lightweight design for easy maneuverability.
- Snapper 1687919: Equipped with a high-performance engine and a self-propelled feature, this mower is designed for efficiency in larger yards. Its durable construction and innovative cutting technology make it a reliable choice for homeowners.
- Sun Joe MJ401C: This compact and lightweight mower is perfect for small yards, featuring a 14-inch cutting deck and an eco-friendly battery system. Its user-friendly design makes it easy to operate, making it a great choice for those who want a hassle-free mowing experience.
- McLane 101-5.5GT: This reel mower offers a traditional cutting experience with a focus on precision and eco-friendliness. Its adjustable cutting height and durable construction make it suitable for maintaining a well-manicured lawn without the use of gas.
- PowerSmart DB2194S: This mower provides a powerful performance with its reliable engine and a 3-in-1 feature for versatile grass management. The adjustable handle and compact design make it an excellent choice for homeowners with smaller yards.
- American Lawn Mower Company 50514: This manual reel mower is known for its simplicity and environmental benefits, providing a quiet and efficient way to mow without the need for gas or electricity. Its lightweight design and adjustable cutting heights make it easy to use, especially for small lawns.
- Honda HRR216K9VKA: This model is highly regarded for its robust build and exceptional cutting capabilities, featuring a reliable engine and a user-friendly design. Its versatility in mulching, bagging, and side discharge makes it suitable for various mowing needs.
How Does a 21-Inch Lawn Mower Compare to Other Sizes in Terms of Performance?
| Feature | 21-Inch Mower | 18-Inch Mower | 24-Inch Mower |
|---|---|---|---|
| Cutting Width | 21 inches – Ideal for medium to large lawns. | 18 inches – Suitable for small to medium lawns. | 24 inches – Best for large areas, reduces mowing time. |
| Mowing Speed | Moderate speed – Balanced for maneuverability. | Slower – More time required for larger areas. | Faster – Covers more ground quickly. |
| Ease of Use | Good maneuverability – Handles well in tight spaces. | Very easy – Lightweight and simple to operate. | Heavier – Requires more strength to maneuver. |
| Best Uses | Versatile – Great for residential and light commercial use. | Residential – Perfect for smaller yards. | Commercial – Ideal for larger properties and professional use. |
| Weight | Approx. 60 lbs – Manageable for most users. | Approx. 40 lbs – Lightweight and easy to handle. | Approx. 80 lbs – Heavier, requires more effort to move. |
| Power Source | Gas or electric – Offers flexibility based on preference. | Electric – Typically battery-powered for convenience. | Gas – Provides strong power for large jobs. |
| Typical Price Range | $300-$500 – Mid-range investment for quality. | $200-$350 – Budget-friendly option. | $500-$800 – Higher investment for professional use. |
| Maintenance Requirements | Moderate – Regular oil changes and blade sharpening needed. | Low – Minimal maintenance for electric models. | High – Frequent maintenance for optimal performance. |
| Noise Level | Moderate – Comparable to standard lawn equipment. | Low – Quieter operation, especially electric models. | High – Noisy operation, especially gas-powered. |