AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144cc vs Greenworks 13 Amp 14-Inch Corded Dethatcher /
Updated July 2026 — AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144cc leads on engine size and weight.
The AMERISUN mower excels in cutting performance and versatility, while the Greenworks dethatcher is a budget-friendly option focused on lawn health.
Why AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144cc is better
Cutting Power
144cc engine provides superior cutting performance.
Versatility
3-in-1 functionality for mulching, bagging, and side discharge.
Durability
Rust-resistant steel deck ensures long-lasting use.
Why Greenworks 13 Amp 14-Inch Corded Dethatcher / is better
Price
Lower price makes it more accessible.
Weight
Lightweight design allows for easier maneuverability.
Warranty
3-year warranty provides added peace of mind.
Overall score
Specifications
| Spec | AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144cc | Greenworks 13 Amp 14-Inch Corded Dethatcher / |
|---|---|---|
| Engine Type | 4-Cycle | Electric |
| Start Type | Pull Start | Push Button |
| Height Settings | 6 Levels | 3 Positions |
| Grass Catcher | 1.4 Bushel | None |
| RPM | N/A | 3200 |
Dimension comparison
Overview of the Products
The AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower is designed for efficient lawn maintenance, while the Greenworks 13 Amp 14-Inch Corded Dethatcher/Scarifier focuses on lawn health through thatch removal. Both tools serve distinct purposes in lawn care, appealing to different needs and preferences.
The AMERISUN lawn mower, priced at $238.49, features a powerful 144cc engine and a versatile 3-in-1 operation for mulching, bagging, and side discharge. In contrast, the Greenworks dethatcher, at $159.90, aims to improve lawn health by removing thatch with a lightweight design and adjustable tine depths.
Performance and Power
When considering performance, the AMERISUN lawn mower stands out with its 144cc 4-cycle OHV engine, delivering consistent cutting power for small to medium yards. It ranks at 8653 in sales, indicating a solid demand among users. The engine's pull-start system ensures quick ignition, making it user-friendly.
On the other hand, the Greenworks dethatcher boasts a 13 Amp motor that operates at a no-load speed of 3200 RPM. This powerful motor effectively tackles thatch, moss, and debris, making it an excellent option for lawn care enthusiasts. While the dethatcher's primary function is different from that of the mower, its focus on lawn health is crucial for long-term yard maintenance.
Cutting Width and Versatility
The cutting width is a significant factor when comparing these two products. The AMERISUN mower has a 21-inch cutting deck, allowing it to cover more ground quickly, which is beneficial for those with larger lawns. Its 3-in-1 functionality provides versatility, enabling users to mulch, bag, or discharge clippings according to their needs.
In contrast, the Greenworks dethatcher features a narrower 14-inch working path. While it may take longer to cover a large area, its design allows for precision in removing thatch. The quick-release feature for switching between dethatcher and scarifier attachments adds versatility for users looking to maintain their lawns effectively.
Weight and Maneuverability
The AMERISUN mower weighs 68 lbs, which, while slightly heavier, is manageable for a walk-behind model. Its design includes durable wheels that enhance stability, making it easier to maneuver around obstacles like flower beds and trees. The foldable handle is a convenient feature for compact storage.
In comparison, the Greenworks dethatcher is designed with a lightweight frame, making it easy to maneuver. This aspect is crucial when dealing with lawn care tasks that require frequent adjustments. The push-button start also simplifies operation, making it accessible for users of all experience levels.
Price Comparison
In terms of pricing, the AMERISUN mower is listed at $238.49, making it about 49% more expensive than the Greenworks dethatcher, which costs $159.90. This significant price difference reflects the differing functionalities of the products: the mower is a more complex machine designed for cutting grass, while the dethatcher focuses solely on lawn maintenance through thatch removal.
This price distinction may influence buyers depending on their specific lawn care needs. For those seeking a complete mowing solution, the investment in the AMERISUN mower may be justified. However, if lawn health is the primary concern, the Greenworks dethatcher offers a budget-friendly alternative.
User Experience and Convenience
User experience is an essential factor to consider when comparing the AMERISUN mower and the Greenworks dethatcher. The AMERISUN mower's easy pull-start system and adjustable height settings (ranging from 1.5” to 3.9”) enhance user convenience, allowing for customized cutting based on grass types and conditions.
Conversely, the Greenworks dethatcher emphasizes ease of use with its lightweight design and push-button start. The 3-position tine depth adjustment is a valuable feature, enabling users to tailor their dethatching efforts according to the specific needs of their lawn. This adaptability can be particularly beneficial during different seasons.
Maintenance and Durability
Durability is a critical aspect of any outdoor power tool, and both products demonstrate strengths in this area. The AMERISUN mower features a rust-resistant steel deck, designed for long-lasting performance even under regular use. This robust construction is essential for a mower that can handle thick grass and frequent mowing.
The Greenworks dethatcher, while lighter, is built with stainless steel tines, ensuring durability during dethatching tasks. The 3-year warranty provided with the dethatcher offers peace of mind, indicating the manufacturer's confidence in the product's longevity. While both tools are designed for longevity, the choice may hinge on which specific maintenance tasks the user prioritizes.
Which should you buy?
Choosing between the AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower and the Greenworks 13 Amp 14-Inch Corded Dethatcher/Scarifier ultimately depends on your lawn care needs. If you require a powerful mower capable of handling small to medium yards with versatility in grass management, the AMERISUN mower is a solid choice, albeit at a higher price of $238.49.
However, if your primary concern is maintaining lawn health through thatch removal, the Greenworks dethatcher at $159.90 offers an effective and economical solution. Consider your specific lawn care requirements and budget to determine which product aligns best with your gardening goals.

