Ezasin 21" Self-Propelled Gas Lawn Mower, 170cc vs RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah
Updated July 2026 — Ezasin 21" Self-Propelled Gas Lawn Mower, 170cc wins on cutting width and power, RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah wins on price and weight.
The Ezasin mower excels in power and versatility, while the RB mower is lightweight and budget-friendly. Choose based on your lawn size and needs.
Why Ezasin 21" Self-Propelled Gas Lawn Mower, 170cc is better
Power
Ezasin has a 170cc engine compared to RB's battery motor.
Cutting Width
Ezasin features a 21-inch cutting deck versus RB's 9-inch.
Versatility
Ezasin offers a 3-in-1 cutting system, unlike RB.
Why RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah is better
Weight
RB is significantly lighter at 11.5 lbs compared to Ezasin.
Price
RB is priced at $169.99, making it more affordable.
Storage
RB has a compact design for easy storage.
Overall score
Specifications
| Spec | Ezasin 21" Self-Propelled Gas Lawn Mower, 170cc | RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah |
|---|---|---|
| Engine Type | 170cc Gas | 40V Battery |
| Cutting Heights | 7 Positions | 3 Heights |
| RPM | 2900 | 6000 |
| Grass Collector | 1.9 Bushels | None |
| Mowing Area | Medium | Small |
Dimension comparison
Overview of the Ezasin 21" Self-Propelled Gas Lawn Mower
The Ezasin 21" Self-Propelled Gas Lawn Mower is designed for users with medium-sized lawns. Priced at $379.99, it features a powerful 170cc 4-stroke engine, offering 4.0 HP of power for efficient mowing. With a sales rank of 27,166, this mower is built for reliability and dependability, making it a solid choice for those who prioritize performance in lawn care. The mower’s 21-inch cutting width and advanced 3-in-1 cutting system allow for flexibility in lawn maintenance, making it suitable for various grass types and conditions.
Overview of the RB 9" Small Lawn Mower
The RB 9" Small Lawn Mower, retailing for $169.99, is tailored for smaller spaces and is ideal for lawns up to 540 square feet. This ultra-lightweight mower weighs just 11.5 pounds (without the battery), making it incredibly easy to maneuver in tight corners. With a significantly better sales rank of 20,912, this mower is particularly appealing to those seeking a compact solution for small yards. Its 40V 2Ah battery provides an efficient 6000 RPM brushless motor, ensuring a clean cut while offering easy maintenance, making it perfect for beginners and those with limited storage space.
Performance and Power
In terms of performance, the Ezasin mower stands out with its robust 170cc engine, delivering consistent power for tackling thicker grass and larger lawns. This engine is designed for dependable startups, allowing users to manage medium-sized lawns with ease. Conversely, the RB mower, while less powerful due to its battery-powered 6000 RPM brushless motor, excels in efficiency and ease of use, particularly for small, flat areas. The Ezasin’s engine delivers a more powerful mowing experience, but the RB mower's zero maintenance feature and lightweight design make it an attractive option for those with smaller, less demanding lawns.
Cutting Capability
When it comes to cutting capability, the Ezasin mower features a wide 21-inch cutting deck and a versatile 3-in-1 system that allows for rear bagging, mulching, or side discharge. This versatility makes it suitable for adapting to varying grass conditions and seasonal needs. In contrast, the RB mower has a smaller 9-inch cutting width with three adjustable cutting heights ranging from 1.2 inches to 2 inches. While it may not cover as much ground as the Ezasin, it provides sufficient customization for maintaining a well-groomed small lawn. The larger cutting deck of the Ezasin allows for fewer passes, which can save time for users mowing bigger spaces.
Maneuverability
Maneuverability is a key feature where the RB small lawn mower shines, weighing only 11.5 pounds and featuring one-hand steering, making it exceptionally easy to navigate around obstacles in tight spaces. Its pivoting front wheels enhance its ability to maneuver in complex landscapes. On the other hand, the Ezasin mower, with its 10-inch rear wheels and 8-inch front wheels, is designed for better traction and ease of pushing over uneven terrain. While the Ezasin offers greater stability for larger yards, the RB mower's lightweight design is ideal for quick turns and handling in smaller areas.
Storage and Convenience
The RB mower excels in terms of storage convenience, featuring a detachable aluminum handle and an upright storage design that saves up to 70% of storage space. This makes it a perfect fit for those with limited storage options. The compact design is ready to use right out of the box, appealing to beginners who may not want to deal with assembly. In comparison, the Ezasin mower, though larger and more powerful, requires more storage space due to its size. Those with ample storage space may prefer the Ezasin for its performance, while those with limited space will appreciate the RB's compact storage solutions.
Price Comparison
Price plays a significant role in decision-making, and here, the RB mower is notably the more affordable option at $169.99, making it about 55% cheaper than the Ezasin mower priced at $379.99. This substantial price difference could be decisive for budget-conscious consumers or those who only require a mower for a small area. The Ezasin mower’s higher price reflects its power and versatility, making it more suitable for users seeking a long-term investment for larger lawns.
Which should you buy?
Deciding between the Ezasin 21" Self-Propelled Gas Lawn Mower and the RB 9" Small Lawn Mower ultimately depends on your specific needs. If you have a medium-sized lawn and prioritize power and versatility, the Ezasin is worth the investment. However, if you have a small yard and seek a lightweight, easy-to-maneuver option that is budget-friendly, the RB mower is an excellent choice. Consider your lawn size, maintenance preferences, and budget when making your decision.

