Choosing the best 21 inch self propelled lawn mower is essential for achieving a perfectly manicured lawn with minimal effort. There are various types, including gas-powered and electric models, and the 21 inch self propelled lawn mower deliver convenience and power for any yard size.
A properly fitted 21 inch self propelled lawn mower in 2026 enhances your mowing experience by reducing physical strain and increasing efficiency. Designed to match various lawn conditions, top-rated covers offer superior performance and durability.
This guide highlights the best 21 inch self propelled lawn mower to help you choose the right option for your specific lawn care needs and preferences.
10 best 21 inch self propelled lawn mower
“Before you buy, carefully consider your lawn's terrain and size. If you need to tackle thick grass and larger areas, a powerful gas-powered model is your best bet. If noise reduction and eco-friendliness are your top concerns, invest in a battery-powered mower with a long-lasting battery. Always double-check the product listing for your specific engine size and cutting width, and confirm compatibility with features like mulching or bagging to avoid frustration.”
best 21 inch self propelled lawn mower Comparison Table
| Product | Best For | Key Strength | Who It’s For | |
|---|---|---|---|---|
| AMERISUN 21 inch self propelled lawn mower | Best For: Excellent Value | Key Strength: Robust 170cc Engine | Who It's For: Budget-Conscious Buyers | Check Price |
| PowerSmart 21 inch self propelled lawn mower | Best For: Reduced User Fatigue | Key Strength: Briggs & Stratton Engine | Who It's For: Value Seekers | Check Price |
| BILT HARD 21 inch self propelled lawn mower | Best For: Various Grass Conditions | Key Strength: Powerful 201cc Engine | Who It's For: Homeowners | Check Price |
| BILT HARD 21 inch self propelled lawn mower | Best For: Mowing On Slopes | Key Strength: Ample Cutting Force | Who It's For: Most Lawns | Check Price |
| PowerSmart 21 inch self propelled lawn mower | Best For: Thick Grass | Key Strength: Foldable Handle Storage | Who It For: Homeowners | Check Price |
| PowerSmart 21 inch self propelled lawn mower | Best For: Less Strenuous Mowing | Key Strength: Reliable Briggs & Stratton Engine | Who It's For: Homeowners | Check Price |
| Greenworks 21 inch self propelled lawn mower | Best For: Quiet Operation | Key Strength: No Emissions | Who It's For: Eco-Conscious Users | Check Price |
| AMERISUN 21 inch self propelled lawn mower | Best For: Thick Grass & Inclines | Key Strength: Rear-Wheel Drive System | Who It's For: Medium-Large Lawns | Check Price |
| Greenworks 21 inch self propelled lawn mower | Best For: Gas-Mower Performance | Key Strength: 80V Brushless Motor | Who It's For: Tool Ecosystem Users | Check Price |
| Mutaomay 21 inch self propelled lawn mower | Best For: Customized Lawn Care | Key Strength: Large Capacity Bag | Who It's For: Homeowners | Check Price |
1. AMERISUN 21 inch self propelled lawn mower – Affordable Pick
Tackling a large yard can feel like a chore, but the AMRISUN 21-Inch Self-Propelled Gas Lawn Mower is designed to make it significantly easier. This mower is perfect for homeowners with medium to large lawns who are looking for a reliable and powerful machine without breaking the bank. Its self-propelled feature takes the strain out of pushing, allowing you to cover more ground with less effort, while the robust 170cc engine ensures it can handle various grass types and conditions.
What truly sets the AMRISUN apart in its price range is the combination of user-friendly features and solid performance. It offers the versatility of 3-in-1 cutting options (mulching, side discharge, and bagging), a convenient 6-position height adjustment, and the dependable power of a 4-stroke engine. If you're seeking a no-nonsense, effective solution for lawn maintenance that offers great value, this AMRISUN model is definitely worth a closer look.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 170cc 4-Stroke Gas Engine |
| Cutting Width | 21 Inches |
| Drive Type | Self-Propelled |
| Cutting Height Adjustment | 6 Positions (1.26 to 3.74 inches) |
| Cutting Options | Mulch, Side Discharge, Bagging |
| Wheel Size | 8-inch Front, 11-inch Rear |
| Fuel Tank Capacity | 0.2 Gallons |
| Oil Capacity | 0.5 Quarts |
Reasons to Buy
- Excellent value for the price, offering robust features for budget-conscious buyers.
- Powerful 170cc engine handles various grass types and yard sizes effectively.
- Versatile 3-in-1 cutting system (mulch, bag, side discharge) adapts to different lawn care needs.
- Self-propelled drive significantly reduces physical effort, making mowing less strenuous.
- Easy 6-position height adjustment for precise lawn maintenance.
Reasons to Avoid
- Noise level may be higher than some premium models.
- While durable for its class, it may not offer the same long-term heavy-duty performance as more expensive brands.
2. PowerSmart 21 inch self propelled lawn mower – Best Value
If you're looking for a reliable and capable self-propelled lawn mower that won't break the bank, the PowerSmart 21-inch model with its Briggs & Stratton engine is a fantastic option for homeowners. This mower is designed to make yard work less of a chore, offering a blend of power, convenience, and durability that punches above its weight class. It’s ideal for those with medium to large yards who need a mower that can handle varied terrain and grass types with ease.
What truly sets this PowerSmart mower apart is the combination of a reputable Briggs & Stratton engine and a robust steel deck, all wrapped up in a self-propelled package at an accessible price point. It simplifies the mowing process significantly, allowing you to focus on getting the job done efficiently rather than struggling with pushing a heavy machine. For anyone seeking a no-nonsense, effective tool for lawn maintenance, this mower delivers excellent performance and value.
Key Specifications
| Feature | Details |
|---|---|
| Engine | Briggs & Stratton 140cc |
| Cutting Width | 21 inches |
| Drive System | Self-propelled |
| Deck Material | Steel |
| Height Adjustments | 6 positions (1.2" to 3.5") |
| Cutting Options | Mulch, Bag, Side Discharge |
| Wheel Size | 8-inch front, 11-inch rear |
Reasons to Buy
- Excellent value for a self-propelled mower with a Briggs & Stratton engine.
- The self-propelled system significantly reduces user fatigue.
- Durable steel deck offers longevity and better protection.
- Versatile 3-in-1 cutting system adapts to different lawn care needs.
- Easy-to-use height adjustment provides precise control over grass length.
Reasons to Avoid
- While the steel deck is durable, it can be heavier than composite alternatives.
- The self-propelled speed may not be adjustable for all user preferences.
3. BILT HARD 21 inch self propelled lawn mower – Premium Choice
For homeowners looking to tackle their lawns with efficiency and power, the BILT HARD 21 Inch Self-Propelled Gas Lawn Mower presents a compelling option. This machine is designed to make lawn care less of a chore, offering robust performance thanks to its substantial 201cc 4-cycle OHV engine. Whether you're dealing with a small suburban yard or a larger property, its self-propelled nature significantly reduces physical strain, allowing you to maneuver with ease and cover more ground in less time.
What truly sets this mower apart is its blend of power, versatility, and user-friendly features. The 3-in-1 cutting system provides flexibility for managing grass clippings, while the easily adjustable cutting height ensures a tailored finish for any lawn. Combined with an emphasis on straightforward starting and reliable operation, the BILT HARD mower aims to deliver a premium lawn care experience without unnecessary complexity, making it a standout choice for those who value both performance and convenience.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 201cc 4-Cycle OHV |
| Cutting Width | 21 Inches |
| Drive System | Self-Propelled |
| Functions | Bagging, Mulching, Side Discharge |
| Cutting Height Adjustment | 8 Positions |
| Starting System | Easy Start |
| Wheel Size | 8-inch Front / 11-inch Rear |
Reasons to Buy
- Powerful 201cc engine easily handles various grass conditions.
- Self-propelled drive significantly reduces physical effort.
- Versatile 3-in-1 cutting system (bag, mulch, side discharge) offers flexibility.
- 8-position height adjustment allows for precise lawn care.
- Easy Start system simplifies engine ignition.
Reasons to Avoid
- May be heavier than some electric or smaller gas models, potentially impacting maneuverability in very tight spaces.
- The "Easy Start" system's effectiveness can vary slightly between individual units and user technique.
4. BILT HARD 21 inch self propelled lawn mower – Budget Friendly
Tackling lawn care doesn't have to break the bank, and the BILT HARD 21 Inch Self-Propelled Gas Lawnmower is a prime example of that. Designed for homeowners who need a reliable and capable machine without the premium price tag, this mower offers a robust 201cc 4-cycle engine that provides ample power for most residential yards. Its self-propelled feature makes mowing less of a chore, especially on inclines or larger properties, while the 3-in-1 functionality ensures versatility in how you manage your grass clippings.
What truly sets this BILT HARD model apart in its price bracket is the combination of a powerful engine, user-friendly operation, and adaptable cutting options. It’s built for those who value efficiency and effectiveness, offering a straightforward approach to lawn maintenance that gets the job done without unnecessary complexities. If you're looking for a no-nonsense, hardworking mower that can handle bagging, mulching, or side discharge with ease, this model deserves a closer look.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 201cc 4-Cycle Gas Engine |
| Cutting Width | 21 Inches |
| Drive System | Self-Propelled |
| Cutting Functions | Bagging, Mulching, Side Discharge |
| Height Adjustment | 8-Position Manual Adjustment |
| Starting System | Easy Start |
| Wheel Size | 8-inch front, 11-inch rear |
| Deck Material | Steel |
Reasons to Buy
- Powerful 201cc engine provides ample cutting force for most lawns.
- Self-propelled drive makes mowing easier, especially on slopes.
- 3-in-1 cutting system offers flexibility for bagging, mulching, or side discharge.
- 8-position height adjustment allows for precise control over grass length.
- Budget-friendly price point offers excellent value for the features provided.
Reasons to Avoid
- Manual height adjustment can be more time-consuming than tool-less systems.
- Fixed speed self-propel may not suit users who prefer variable speed control.
- Basic build materials may not offer the same long-term durability as premium models.
5. PowerSmart 21 inch self propelled lawn mower – Top Performer
If you're in the market for a reliable and powerful gas-powered mower that takes the strain out of yard work, the Amerisun 21" Self-Propelled Gas Lawn Mower is a fantastic option to consider. Designed for homeowners who want a clean cut and effortless operation, this mower boasts a robust 170cc OHV engine that makes tackling even thicker grass a breeze. Its self-propelled functionality means you can navigate your lawn with minimal pushing, making it ideal for those with medium to large yards or who simply want to reduce physical exertion.
What truly sets the Amerisun apart is its blend of power, versatility, and user-friendly design. The 3-in-1 cutting system offers mulching, bagging, and side-discharging capabilities, allowing you to customize your lawn care approach. Combined with its durable steel deck and convenient features like a 6-position height adjustment and foldable handle for easy storage, this mower delivers excellent value and performance for its class.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 170cc OHV with Forced Air-Cooling |
| Cutting Width | 21 inches |
| Drive System | Self-Propelled |
| Cutting Options | 3-in-1 (Mulch, Bag, Side Discharge) |
| Deck Material | Steel |
| Height Adjustment | 6-Position |
| Handle | Foldable |
| Starting System | Recoil Start |
Reasons to Buy
- Powerful 170cc engine handles thick grass with ease.
- Versatile 3-in-1 cutting system for mulching, bagging, or side-discharging.
- Effortless self-propelled operation reduces physical strain.
- Foldable handle allows for compact and convenient storage.
- Durable steel deck built for longevity.
Reasons to Avoid
- Electric or battery-powered start is not available.
- May be heavier than some electric or smaller push mowers.
6. PowerSmart 21 inch self propelled lawn mower – Recommended
For homeowners looking for a reliable and straightforward way to maintain their lawns, the PowerSmart 21-Inch Self-Propelled Lawn Mower presents a compelling option. This mower is designed to tackle medium-sized yards with its efficient 144cc engine and versatile 3-in-1 cutting system, making lawn care less of a chore. It’s particularly well-suited for those who appreciate a self-propelled feature to reduce pushing effort and a simple, no-fuss operation.
What truly sets this PowerSmart model apart is its blend of user-friendly design and robust functionality. The self-propelled drive system takes the strain out of mowing, allowing you to navigate your yard with ease, while the choice between mulching, bagging, or side-discharging clippings offers flexibility depending on your lawn's needs and your personal preference. It's a practical choice for anyone seeking a dependable mower that gets the job done without unnecessary complexity.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 144cc Briggs & Stratton |
| Cutting Width | 21 inches |
| Drive System | Self-propelled |
| Cutting Options | Mulch, Bag, Side Discharge |
| Height Adjustment | 6-position |
| Wheel Size | 8-inch front, 11-inch rear |
| Weight | 75 lbs |
| Assembly Required | Yes |
Reasons to Buy
- The self-propelled feature significantly reduces user effort, making mowing less strenuous.
- 3-in-1 cutting system (mulch, bag, discharge) offers excellent versatility for different lawn conditions.
- Reliable 144cc Briggs & Stratton engine provides consistent power and is a trusted brand.
- Larger rear wheels improve maneuverability over varied terrain.
- 6-position height adjustment allows for precise control over grass length.
Reasons to Avoid
- Assembly is required upon delivery, which may be a hurdle for some users.
- The self-propel speed is not adjustable, which might be too fast or too slow for some individuals.
7. Greenworks 21 inch self propelled lawn mower – Recommended
For homeowners looking to ditch the gas and cords without sacrificing power, the Greenworks 40V 21" Self-Propelled Cordless Lawn Mower is a compelling option. This mower is designed to tackle medium-sized yards with ease, offering the convenience of battery power combined with the muscle of self-propulsion. It's an ideal choice for those seeking a quieter, cleaner, and more user-friendly lawn care experience.
What truly sets this Greenworks mower apart is its robust 40V system and the intelligent brushless motor, which work in tandem to deliver consistent cutting performance. Coupled with a substantial 5.0Ah battery and a user-friendly self-propelled system, it offers a fantastic balance of runtime, power, and ease of use, making lawn maintenance less of a chore and more of a breeze.
Key Specifications
| Feature | Details |
|---|---|
| Motor Type | Brushless |
| Cutting Width | 21 inches |
| Battery Voltage | 40V |
| Battery Capacity | 5.0Ah |
| Drive System | Self-Propelled |
| Deck Material | Steel |
| Weight | 65 lbs (approximate with battery) |
| Charge Time | 1.5 hours (approximate) |
Reasons to Buy
- Significantly quieter operation than gas mowers.
- No emissions, making it an environmentally friendly choice.
- Self-propelled feature greatly reduces user fatigue.
- Vertical storage capability saves valuable space.
- Part of a versatile 40V tool ecosystem.
Reasons to Avoid
- May require a second battery for larger yards or heavier cutting conditions.
- Steel deck can be heavier than composite alternatives.
8. AMERISUN 21 inch self propelled lawn mower – Recommended
For homeowners looking to tackle medium to large lawns with ease, the AMERISUN AV8621S1 self-propelled gas mower presents a compelling option. This machine is designed to take the strain out of mowing, offering a robust engine and user-friendly features that make yard work less of a chore. Whether you're dealing with thick grass or uneven terrain, this mower aims to provide a powerful and efficient cutting experience.
What truly sets the AMERISUN AV8621S1 apart is its blend of raw power and thoughtful design. The 170cc engine provides ample torque for challenging conditions, while the rear-wheel drive self-propel system makes maneuvering effortless. Combined with its versatile 3-in-1 cutting capability, this mower offers a comprehensive solution for maintaining a beautiful lawn without breaking a sweat.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 170cc 4-Cycle OHV |
| Cutting Width | 21 inches |
| Drive System | Rear-Wheel Drive (RWD) Self-Propelled |
| Cutting Options | Mulch, Bag, Side Discharge |
| Starting System | Recoil Start |
| Wheel Size (Front/Rear) | 8 inches / 11 inches |
| Deck Material | Steel |
Reasons to Buy
- Powerful 170cc engine handles thick grass and inclines with ease.
- Rear-wheel drive self-propel system significantly reduces user effort.
- 21-inch cutting width allows for efficient mowing of medium to large lawns.
- Versatile 3-in-1 cutting system (mulch, bag, side discharge) adapts to various lawn needs.
- Durable steel deck and reliable 4-cycle engine for long-term use.
Reasons to Avoid
- Recoil start may be challenging for some users compared to electric start.
- Steel deck, while durable, can be heavier than aluminum or composite decks.
9. Greenworks 21 inch self propelled lawn mower – Recommended
For homeowners looking to ditch the gas and embrace a cleaner, quieter way to maintain their lawns, the Greenworks 80V 21" Self-Propelled Cordless Lawn Mower presents a compelling solution. This mower is designed for those who value convenience, power, and environmental consciousness, offering a robust cutting experience without the hassle of fuel, oil, or pull cords. It’s an excellent choice for medium to large yards where a reliable and powerful electric mower is desired.
What truly sets this Greenworks model apart is its potent 80V battery system, delivering performance that rivals many gas-powered mowers, combined with the intelligent self-propelled feature that significantly reduces user fatigue. The inclusion of a rapid charger and a substantial 4.0Ah battery means you can tackle your mowing tasks efficiently and with minimal downtime, making lawn care less of a chore and more of a breeze.
Key Specifications
| Feature | Details |
|---|---|
| Motor Type | Brushless |
| Cutting Width | 21 inches |
| Battery System | 80V |
| Battery Capacity | 4.0Ah |
| Self | Propelled: Yes |
| Charging Time | Approximately 30 minutes (Rapid Charger) |
| Deck Material | Steel |
| Weight | 65 lbs (with battery) |
Reasons to Buy
- Powerful performance comparable to gas mowers thanks to the 80V brushless motor.
- Effortless mowing with the variable-speed self-propelled drive system.
- Rapid charging significantly minimizes downtime between mowing sessions.
- Part of a versatile 80V battery system compatible with numerous other Greenworks tools.
- Low maintenance and easy push-button start offer superior convenience over gas mowers.
Reasons to Avoid
- The initial investment for the mower, battery, and rapid charger can be higher than comparable gas mowers.
- Runtime may be insufficient for extremely large lawns (over 1/2 acre) without purchasing additional batteries.
10. Mutaomay 21 inch self propelled lawn mower – Recommended
For homeowners looking to tackle their lawn care with a reliable and efficient machine, the MTAOMAY 170CC Self-Propelled Gas Lawn Mower presents a compelling option. This mower is designed to make the often-arduous task of mowing more manageable, especially for those with medium to large yards. Its self-propelled nature takes the strain out of pushing, while the 21-inch cutting deck ensures you can cover ground quickly.
What truly sets this MTAOMAY mower apart is its blend of power, versatility, and user-friendly design. It offers multiple cutting options, a robust engine, and thoughtful features that contribute to a cleaner cut and a more pleasant mowing experience. If you're seeking a gas-powered mower that balances performance with ease of use, this model is definitely worth a closer look.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 170CC |
| Cutting Width | 21 inches |
| Drive System | Self-Propelled |
| Cutting Options | Mulching, Side Discharge, Bagging (Bag sold separately) |
| Height Adjustment | 7 Positions (1.2-3.5 inches) |
| Wheel Size | 8-inch Front, 11-inch Rear |
| Fuel Tank Capacity | 1.5 Liters |
| Weight | 75 lbs |
Reasons to Buy
- Powerful 170CC engine handles thick grass with ease.
- Self-propelled drive system significantly reduces user effort.
- Versatile 3-in-1 cutting system (mulch, side discharge, bag).
- Easy-to-use 7-position height adjustment for customized lawn care.
- Larger rear wheels improve maneuverability and traction.
Reasons to Avoid
- Grass collection bag is sold separately.
- Weight may be a consideration for some users on very steep inclines without the self-propel engaged.
Our Top Picks for the best 21 inch self propelled lawn mower
Here are our top 3 picks based on performance, versatility, and user satisfaction.
Wrap Up the best 21 inch self propelled lawn mower
Choosing the right lawn mower depends on your priorities—engine power, cutting versatility, or ease of use. For homeowners tackling larger or more challenging yards, a powerful gas engine is often preferred. For those seeking a quieter, more environmentally friendly option, cordless electric models are excellent. The best 21 inch self propelled lawn mower we reviewed offer solid value and features. Investing wisely ensures a rewarding experience for years.
Consider your yard's specific needs: the type of grass, terrain, and your personal preferences for maintenance. Whether you opt for gas or electric, a self-propelled feature will significantly reduce the physical effort involved in keeping your lawn looking its best.
FAQs Regarding 21 inch self propelled lawn mower
What is the difference between front-wheel and rear-wheel drive on a self-propelled mower?
Rear-wheel drive offers better traction on inclines and uneven terrain, while front-wheel drive provides greater maneuverability, especially in tight spaces.
How much power (cc) do I need for my lawn mower?
For average lawns, 140cc to 170cc is usually sufficient. For thicker grass or larger properties, consider engines in the 200cc range.
Are 21 inch self propelled lawn mower good for hilly terrain?
Yes, many 21 inch self propelled lawn mower are designed for hilly terrain, especially those with rear-wheel drive and variable speed control.
What is the benefit of a 3-in-1 cutting system?
A 3-in-1 system allows you to bag clippings, mulch them back into the lawn, or discharge them to the side, offering flexibility for different lawn conditions and preferences.
How often should I perform maintenance on a gas 21 inch self propelled lawn mower?
Regular maintenance typically includes checking oil levels, cleaning or replacing the air filter, and ensuring the spark plug is in good condition. Consult your owner's manual for specific schedules.
Can I use a cordless electric mower for a large yard?
Cordless electric mowers are becoming more powerful, but for very large yards, you might need multiple batteries or consider a gas model for uninterrupted mowing.
What is the advantage of a steel deck over a composite deck?
Steel decks are generally more durable and resistant to impact damage, though they can be heavier. Composite decks are lighter and rust-resistant.
Is a 21 inch self propelled lawn mower easy to store?
Many models feature foldable handles, making them more compact for storage in garages or sheds.
