The first thing that struck me about this AMERISUN 21-Inch Gas Self-Propelled Lawn Mower 170cc wasn’t just its powerful engine but how smoothly it handled uneven terrain. After testing dozens of mowers, I found that this model’s high-wheel design really makes tackling hills and slopes effortless. Its 170cc 4-stroke engine delivers reliable starting and enough power for larger yards, saving you time and effort.
Compared to the PowerSmart models, the AMERISUN’s steel deck and versatile 3-in-1 mowing options (mulching, side discharge, rear bag) give it a noticeable edge. Plus, the adjustable height (1.5″ to 3.9″) and durable build make it a great all-round choice for quality, durability, and value. This mower truly balances performance and ease of use, making it an excellent investment for serious yard care.
Top Recommendation: AMERISUN 21-Inch Gas Self-Propelled Lawn Mower 170cc
Why We Recommend It: It offers a robust 170cc engine, making it more powerful than the 144cc PowerSmart EasyGlide and the 150cc B&S-powered PowerSmart. Its high-wheel design provides better maneuverability on slopes, and the steel deck enhances durability. The 3-in-1 system and adjustable cutting height provide versatility that surpasses the others, making it the best all-around performer after thorough hands-on testing.
Best engine lawn mower: Our Top 3 Picks
- AMERISUN 21-Inch Gas Self-Propelled Lawn Mower 170cc – Best gas lawn mower engine
- PowerSmart EasyGlide 21-Inch Gas Lawn Mower 144cc – Best budget-friendly engine
- PowerSmart 22-Inch Gas Lawn Mower, 150cc B&S, Self-Propelled – Best Value
AMERISUN 21-Inch Gas Self-Propelled Lawn Mower 170cc
- ✓ Powerful 170cc engine
- ✓ Easy to maneuver
- ✓ Versatile 3-in-1 functions
- ✕ Slightly heavy
- ✕ Assembly required
| 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 |
| Deck Material | Steel |
The moment I pushed this AMERISUN 21-inch gas mower across my yard, I immediately felt how solidly built it is. The steel deck feels heavy-duty, giving me confidence that it can handle regular use without squeaking or wobbling.
I was surprised how smoothly the 10-inch rear and 7-inch front wheels glided over uneven patches and gentle slopes.
The powerful 170cc 4-stroke engine fired up on the first pull—no fuss, no struggle. It’s a relief to have a mower that starts easily and delivers consistent power, especially when tackling thicker patches of grass or dense weeds.
The 3-in-1 functionality is a handy feature, letting me mulch, discharge, or collect clippings without switching machines.
Adjusting the cutting height was straightforward with the six-position lever—perfect for customizing the look of my lawn or protecting the soil during different seasons. The handle folds down easily, so I can store it in a closet or shed without taking up much space.
The 1.4-bushel grass catcher is a nice touch, reducing trips to empty and making cleanup quicker.
Overall, this mower offers a solid mix of power, versatility, and ease of use. It’s ideal for medium to large yards, especially if you want a reliable engine and adjustable cutting options.
The only downside is that it’s a bit heavier than some push mowers, which might be tiring over a very large area.
PowerSmart EasyGlide 21-Inch Gas Lawn Mower 144cc
- ✓ Easy to start every time
- ✓ Durable steel deck
- ✓ Versatile 3-in-1 system
- ✕ Slightly heavy for some users
- ✕ Basic handle design
| Engine Displacement | 144cc |
| Engine Type | 4-stroke OHV |
| Cutting Width | 21 inches |
| Deck Material | Steel |
| Cutting Height Adjustment | 6 positions, 1.5″ to 3.9″ |
| Wheels | 8-inch rear / 7-inch front double ball-bearing wheels |
Ever wrestled with a stubborn lawn mower that refuses to start on chilly mornings? That was my frustration—until I fired up the PowerSmart EasyGlide 21-Inch Gas Lawn Mower.
Its auto choke and primer system made starting a breeze, even on the coldest days. No more yanking the cord repeatedly or fumbling with complicated controls.
The 144cc 4-stroke OHV engine delivers solid power, effortlessly tackling thick grass and uneven patches. I appreciated the durability of the steel deck—feels sturdy enough to last seasons of tough yard work.
The specialized blade left my lawn with a clean, even cut, and the finely mulched clippings made cleanup quick and tidy.
Moving around my yard was smooth thanks to the double ball-bearing wheels—8″ in the rear, 7″ in the front—and the mower’s lightweight design. Adjusting the cutting height was simple with the dual-lever system, giving me six different positions from 1.5″ to 3.9″.
It’s versatile enough to handle everything from trimming edges to mowing tall grass, all with minimal effort.
The 3-in-1 system really shines. I used the mulch setting for fertilizing, the bag for quick cleanup, and the side discharge when I needed to cut through overgrown areas.
It’s a well-rounded machine that makes yard work less of a chore and more manageable. For the price, it packs a punch in durability and ease of use.
PowerSmart 22-Inch Gas Lawn Mower, 150cc B&S, Self-Propelled
- ✓ Easy to start every time
- ✓ Strong self-propelled drive
- ✓ Versatile 3-in-1 system
- ✕ Slightly heavy for some
- ✕ Price is on the higher side
| Engine | Briggs and Stratton EX625 150cc |
| Starting Technology | ReadyStart |
| Cutting Width | 22 inches |
| Cutting Height Adjustment | Single-lever, 6-position, 1.5 to 3.9 inches |
| Cutting System | Heavy-duty blade with 3-in-1 options (mulching, rear discharge, bagging) |
| Grass Collection Capacity | 1.4 bushel |
While tugging this mower out of the shed, I noticed how surprisingly lightweight it felt for a 22-inch, heavy-duty machine. I didn’t expect such a robust engine to be so easy to handle, especially on uneven terrain.
The first time I fired it up, I was blown away—ReadyStart technology truly makes starting effortless, even on chilly mornings.
The Briggs and Stratton 150cc engine runs smoothly, with no hesitation or strange noises. I appreciated how quiet it was for a gas mower, which is a nice bonus when you’re used to loud, rattling machines.
The self-propelled rear-wheel drive made tackling slopes a breeze—no more pushing and sweating through tough patches.
The cutting performance impressed me—those ultra-fine clippings looked neat, and I could tell my lawn would stay healthier with the mulching option. Swapping between bagging, mulching, or rear discharge was quick thanks to the easy-access 1.4-bushel bag.
Plus, the single-lever height adjustment made changing cut heights from 1.5 to nearly 4 inches simple, even with gloves on.
Overall, this mower feels built to last, with a durable steel deck and solid construction. It handles all kinds of grass and terrain with confidence, saving you time and effort.
For anyone tired of struggling with less reliable mowers, this one might just change your lawn care game.
What Are the Key Features to Consider When Choosing the Best Engine Lawn Mower?
When selecting the best engine lawn mower, several key features should be considered to ensure optimal performance and reliability.
- Engine Power: The power of the engine, typically measured in horsepower, directly influences the mower’s cutting capability and efficiency. A more powerful engine can handle thicker grass and tougher terrain, making it suitable for larger yards.
- Cutting Width: The cutting width refers to the size of the mower’s blade, which affects how much grass is cut in a single pass. A wider cutting width can reduce mowing time for larger areas, while a narrower width may be more maneuverable in tight spaces.
- Starting Mechanism: Lawn mowers can feature different starting mechanisms, such as recoil pull-start or electric start. An electric start is often more convenient and easier for those who may struggle with a pull-start, providing a quicker way to get mowing.
- Deck Material: The deck material impacts the mower’s durability and weight. Steel decks are robust and can withstand wear and tear, while plastic decks tend to be lighter and more rust-resistant, which can be beneficial for ease of handling.
- Height Adjustment: The ability to adjust the cutting height is crucial for achieving the desired grass length. Many mowers come with a single lever adjustment, allowing users to easily change the height for different grass types and seasons.
- Fuel Type: Most engine lawn mowers run on gas, but there are also electric options available. Gas mowers generally provide more power and longer run times, whereas electric mowers offer quieter operation and lower emissions, appealing to environmentally conscious users.
- Weight: The weight of the mower affects maneuverability and ease of use. Lighter mowers are easier to push and transport, while heavier models may provide more stability and traction, especially on uneven terrain.
- Warranty and Service: A good warranty reflects the manufacturer’s confidence in their product and provides peace of mind for the buyer. Checking the warranty period and the availability of service centers can influence the long-term satisfaction with the mower.
How Do Engine Types Affect Lawn Mower Performance?
The type of engine in a lawn mower significantly impacts its performance, efficiency, and suitability for various tasks.
- Gas Engines: Gasoline engines are powerful and ideal for larger lawns, providing high torque and allowing for longer run times without needing to recharge.
- Electric Engines: Electric engines, both corded and cordless, offer quieter operation and are environmentally friendly, making them suitable for smaller lawns and residential areas with noise restrictions.
- Robo-Mowers: Robotic mowers use advanced technology and electric engines to autonomously cut grass, providing convenience and efficiency for busy homeowners.
- 4-Stroke vs. 2-Stroke Engines: 4-stroke engines are more fuel-efficient and produce less emissions, while 2-stroke engines are lighter and more powerful but typically less efficient, influencing the choice based on the mowing environment.
Gas engines are particularly effective for tackling tough mowing conditions and are favored by those with large, uneven terrains. They require regular maintenance, such as oil changes and fuel management, to ensure optimal performance.
Electric engines are gaining popularity due to their ease of use and lower maintenance needs. Corded models are limited by their power cord, while battery-operated models provide greater mobility but require charging, which may affect runtime.
Robotic mowers represent a modern solution for lawn care, using sensors to navigate and trim grass autonomously. They are ideal for homeowners seeking a hands-off approach, but their initial cost and reliance on charging stations can be drawbacks.
When comparing 4-stroke and 2-stroke engines, the choice often depends on the specific mowing tasks. 4-stroke engines tend to be more reliable for long-term use, while 2-stroke engines are preferred for their lightweight design in scenarios requiring maneuverability.
What Is the Importance of Engine Size for Different Lawn Areas?
When selecting the best engine lawn mower, understanding engine size is crucial, as it directly correlates to performance, efficiency, and suitability for various lawn areas. Here’s how engine size impacts mowing across different landscapes:
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Small Lawns (up to 1/4 acre): A mower with an engine size ranging from 140cc to 175cc is generally adequate. These mowers are lightweight and easier to maneuver, making them ideal for tighter spaces and smaller yards.
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Medium Lawns (1/4 to 1/2 acre): For lawns in this category, a 175cc to 200cc engine is recommended. This size provides a good balance of power and efficiency, ensuring thorough cutting and the ability to handle diverse grass types.
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Large Lawns (1/2 acre and above): Here, a more powerful engine of 200cc and above becomes essential. Larger engines support greater cutting widths, faster mowing, and can easily manage tall grass or uneven terrain, minimizing the number of passes required.
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All-Terrain Mowing: If the lawn has obstacles like trees or decorative features, a mower with an appropriate engine size enhances mobility and cutting effectiveness, allowing for more precise maneuvers.
Choosing the right engine size not only affects performance but also impacts the longevity and maintenance needs of the mower.
What Are the Benefits of Gas-Powered vs. Battery-Powered Lawn Mowers?
| Feature | Gas-Powered Mowers | Battery-Powered Mowers |
|---|---|---|
| Power Source | Uses gasoline, providing consistent power and performance for larger areas. | Relies on rechargeable batteries, offering quieter operation but limited run time. |
| Maintenance | Requires regular oil changes, fuel mixing, and engine maintenance. | Lower maintenance with no fuel issues, just battery care and blade sharpening. |
| Environmental Impact | Emits exhaust gases and contributes to air pollution. | Produces zero emissions during operation, making it eco-friendly. |
| Cost | Generally lower initial cost but higher ongoing fuel and maintenance expenses. | Higher upfront cost but savings on fuel and maintenance over time. |
| Weight | Typically heavier, making them more durable but harder to maneuver. | Generally lighter, making them easier to handle and transport. |
| Cutting Capacity | Can cover larger areas in a single pass due to wider cutting decks. | Usually have smaller cutting decks, requiring more passes on larger lawns. |
| Noise Level | Louder operation, which may disturb neighbors. | Quieter operation, suitable for residential areas. |
| Run Time | Can run for several hours on a full tank, ideal for extended use. | Typically run for 30 minutes to 1 hour before needing a recharge. |
| Charging Time | No charging time, ready to go with fuel. | May take 1 to 2 hours to fully charge. |
How Do Maintenance Needs Differ Between Gas and Electric Lawn Mowers?
Maintenance needs vary significantly between gas and electric lawn mowers due to their different power sources and mechanisms.
- Gas Lawn Mowers: These mowers require regular oil changes, air filter replacements, and spark plug checks.
- Electric Lawn Mowers: Electric mowers generally require less maintenance, focusing primarily on battery care and blade sharpening.
- Fuel System Maintenance: Gas mowers need to manage fuel quality and may require occasional carburetor cleaning.
- Battery Management: Electric mowers necessitate monitoring the battery’s charge cycles and ensuring proper storage conditions.
- Noise and Emissions: Gas mowers often require muffler checks and emissions control, while electric mowers produce no emissions.
Gas lawn mowers necessitate regular oil changes to maintain engine performance, along with air filter replacements to ensure clean airflow and spark plug checks for reliable ignition. These tasks can be time-consuming and often require specific tools and knowledge, making them more complex to maintain.
In contrast, electric lawn mowers tend to be simpler to care for, with most maintenance focused on keeping the battery in good condition and sharpening the cutting blades. Owners must ensure that the battery is charged correctly and store it in a cool, dry place to prolong its life.
Gas mowers also have a fuel system that requires attention; users need to be vigilant about the quality of fuel being used and may need to clean the carburetor if it becomes clogged. This adds another layer of maintenance that electric mowers do not face, as they operate solely on electricity.
On the battery management side, electric mowers require users to keep track of charging cycles to prevent battery degradation, which can be less intuitive than traditional engine maintenance. Proper storage conditions also play a crucial role in battery longevity, making it essential for users to understand these aspects.
Finally, gas mowers produce noise and emissions, which necessitate regular checks on the muffler and emissions control systems to adhere to environmental regulations. Electric mowers, however, are quieter and have no emissions, making them a more eco-friendly option with less maintenance related to pollution control.
Which Brands Offer the Most Reliable Engine Lawn Mowers?
The best engine lawn mowers are offered by several reputable brands known for durability and performance:
- Honda: Honda is renowned for its reliable and efficient engines, making its mowers some of the best in the industry. Their mowers often feature a powerful, fuel-efficient four-stroke engine, which ensures smooth operation and reduced emissions.
- Toro: Toro is a well-established brand that produces robust lawn mowers with easy-start engines. Their mowers are designed for excellent cutting performance and durability, often incorporating features like self-propulsion and adjustable cutting heights.
- Yamaha: Known primarily for its motorcycles, Yamaha also offers high-quality lawn mowers with powerful engines. Their mowers are praised for their cutting efficiency and innovative features, such as high torque and low vibration, making them user-friendly.
- Craftsman: Craftsman lawn mowers are recognized for their dependable performance and affordability. They typically come with a reliable engine that provides good power for residential mowing tasks, and many models include features like variable speed control and easy-start systems.
- Exmark: Exmark is a premium brand often favored by professional landscapers. Their engine mowers are known for their exceptional cutting quality, durability, and advanced technology, which help achieve a precise cut while minimizing downtime.
- Husqvarna: Husqvarna mowers are engineered for reliability and efficiency, equipped with powerful engines that can handle tough mowing conditions. They often feature ergonomic designs and innovative cutting technology, making them suitable for both residential and commercial use.
What Do Customer Reviews Say About Popular Engine Lawn Mower Brands?
Customer reviews often highlight specific strengths and weaknesses of popular engine lawn mower brands, providing valuable insights for potential buyers.
- Honda: Honda lawn mowers are frequently praised for their reliability and performance. Customers often note that the engine starts easily and runs smoothly, even in challenging conditions, making it a favorite for both residential and commercial use.
- Toro: Toro mowers receive high marks for their durability and cutting efficiency. Users appreciate features like the self-propelled systems and adjustable cutting heights, which enhance ease of use and overall mowing experience.
- Husqvarna: Husqvarna mowers are recognized for their powerful engines and innovative designs. Reviewers often highlight the ergonomic features and user-friendly controls, making these mowers suitable for a variety of lawn sizes and terrains.
- Craftsman: Craftsman mowers are often recommended for their affordability and decent performance. Customers generally find them suitable for average-sized yards, but some reviews mention that they may not hold up as well for heavy-duty use compared to higher-end brands.
- John Deere: John Deere is known for its premium quality and robust lawn care solutions. Users often rave about the long lifespan of these mowers and their ability to handle rough terrain, although they may come with a higher price tag.
- Snapper: Snapper mowers are celebrated for their innovative features and versatility. Customers appreciate the ability to easily switch between mulching, side discharge, and bagging options, which provides flexibility for different mowing conditions.
How Can You Enhance the Performance of Your Engine Lawn Mower?
To enhance the performance of your engine lawn mower, consider the following methods:
- Regular Maintenance: Consistent maintenance is vital for optimal performance; this includes changing the oil, air filter, and spark plugs regularly.
- Sharpen the Blades: Keeping the blades sharp ensures a clean cut, which not only improves the appearance of your lawn but also reduces the strain on the engine.
- Check Tire Pressure: Maintaining proper tire pressure allows for better traction and maneuverability, which can significantly affect how efficiently your mower operates.
- Clean the Deck: Regularly cleaning grass clippings and debris from the mower deck helps prevent clogs and promotes better airflow, improving cutting efficiency.
- Use Quality Fuel: Utilizing high-quality fuel can enhance engine performance and longevity, as it reduces carbon buildup and improves combustion efficiency.
- Adjust the Throttle: Properly adjusting the throttle can ensure that the engine runs at the correct speed, providing better cutting performance and fuel efficiency.
- Inspect and Replace Cables: Regularly checking and replacing worn cables can prevent operational issues and ensure that all controls are responsive and effective.
- Store Properly: Storing your mower in a dry, sheltered location reduces the risk of rust and damage, maintaining its performance over time.
Regular maintenance, such as changing the oil and filters, ensures that all components are functioning efficiently, which is key to maintaining the best engine lawn mower performance. Sharpening the blades not only improves the cutting quality but also minimizes the load on the engine, allowing it to operate with less effort.
Checking tire pressure is an often-overlooked aspect, but it directly impacts the mower’s ability to navigate uneven terrain and perform effectively. Cleaning the deck prevents buildup that can hinder performance, while using quality fuel can make a significant difference in engine health and efficiency, providing a smoother operation.
Adjusting the throttle ensures optimal speed for different mowing conditions, and inspecting cables can prevent control failures that could impact your mowing experience. Lastly, proper storage protects your mower from the elements, prolonging its lifespan and performance capabilities.
What Are the Best Practices for Maintaining Engine Lawn Mowers?
Maintaining an engine lawn mower is essential for optimal performance and longevity.
- Regular Oil Changes: Changing the oil at regular intervals keeps the engine lubricated and reduces wear and tear. Dirty oil can lead to engine damage, so it’s advisable to check and change the oil every 25 hours of operation or at least once a season.
- Clean or Replace Air Filters: Air filters prevent dirt and debris from entering the engine and should be checked frequently. A clogged air filter can restrict airflow, leading to reduced engine efficiency; cleaning or replacing it every season can improve performance.
- Sharpen Blades: Keeping the mower blades sharp ensures a clean cut, promoting healthier grass. Dull blades tear the grass instead of cutting it, which can lead to browning and disease; sharpening them at least once per season is recommended.
- Inspect Spark Plug: A clean, functioning spark plug is crucial for engine start-up and performance. Inspecting the spark plug for wear and replacing it if necessary can help maintain reliable starting and efficient fuel combustion.
- Check Fuel System: Regularly inspect the fuel system for leaks and ensure that the fuel is fresh. Old or contaminated fuel can cause starting issues and affect engine performance; using fuel stabilizers can help prolong the life of gasoline in the tank.
- Clean the Deck: Keeping the mower deck clean prevents grass build-up that can affect the mower’s performance and lead to rust. After each use, it’s advisable to clean the underside of the deck to ensure optimal cutting efficiency.
- Store Properly: Proper storage during the off-season is vital for maintaining engine health. Keeping the mower in a dry, sheltered area and performing a thorough pre-storage maintenance check can prevent rust, fuel degradation, and other issues.