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Greenworks 40V 17" Cordless Lawn Mower – Brushless vs SENIX 20" Gas Lawn Mower, 144 cc Gas Powered

Updated July 2026 — Greenworks 40V 17" Cordless Lawn Mower – Brushless wins on runtime and height adjust, SENIX 20" Gas Lawn Mower, 144 cc Gas Powered wins on noise level and weight.

The Greenworks mower excels in quiet operation and low maintenance, while the SENIX offers more power and a larger cutting width. Choose based on your lawn care needs.

Why Greenworks 40V 17" Cordless Lawn Mower – Brushless is better

Noise

30% quieter than gas mowers

Maintenance

Zero maintenance required

Warranty

3-year warranty on tool and battery

Why SENIX 20" Gas Lawn Mower, 144 cc Gas Powered is better

Power

144 cc gas engine for tougher tasks

Cutting Width

20 inches for larger areas

Price

Lower price at $199.99

Overall score

Greenworks 40V 17" Cordless Lawn Mower – Brushless
85
SENIX 20" Gas Lawn Mower, 144 cc Gas Powered
75

Specifications

SpecGreenworks 40V 17" Cordless Lawn Mower – BrushlessSENIX 20" Gas Lawn Mower, 144 cc Gas Powered
Engine TypeBrushlessGas
Power SourceBatteryGas
Mowing TypeMulch/BagGas Only
Cutting Heights6 Positions3 Positions
Ease of UseHighMedium

Dimension comparison

Greenworks 40V 17" Cordless Lawn Mower – BrushlessSENIX 20" Gas Lawn Mower, 144 cc Gas Powered

Overview of the Greenworks 40V 17" Cordless Lawn Mower

The Greenworks 40V 17" Cordless Lawn Mower is a powerful and versatile electric mower aimed at homeowners with small to medium-sized yards. Priced at $279.99, it features a brushless motor that enhances performance and reduces noise. The mower can run for up to 35 minutes on a single charge, making it suitable for lawns up to 1/4 acre. With its lightweight design and easy maneuverability, this mower is ideal for those looking for a hassle-free mowing experience without the complexities of gas-powered machines.

Overview of the SENIX 20" Gas Lawn Mower

In contrast, the SENIX 20" Gas Lawn Mower is a more robust option that utilizes a 144 cc 4-cycle engine, priced at $199.99. This mower is designed for larger tasks and can tackle both flat and sloped terrains effectively. With a cutting width of 20 inches, it allows for quicker mowing sessions compared to smaller models. The SENIX mower also features a three-position height adjustment, making it adaptable to various grass lengths. Its lower price point makes it an attractive choice for those seeking a powerful gas mower.

Performance Comparison

When it comes to performance, the Greenworks mower boasts a powerful 40V battery that provides up to 35 minutes of runtime, which is suitable for smaller yards. However, the SENIX mower's 144 cc engine offers explosive power, enabling it to tackle larger and tougher mowing tasks. The SENIX mower's design allows it to handle rugged terrain more effectively, thanks to its 7-inch wheel design. While the Greenworks mower is quieter—30% less noise than gas mowers—the SENIX mower delivers a more traditional mowing experience that many homeowners may prefer.

Cutting Width and Versatility

The cutting width of the SENIX mower is 20 inches, which is significantly larger than the Greenworks mower's 17 inches. This increased width allows the SENIX to cover more ground in less time, making it more efficient for larger lawn areas. The Greenworks mower offers 2-in-1 functionality, enabling users to mulch or bag clippings, which adds versatility for garden maintenance. While both mowers offer height adjustments, the SENIX provides three positions compared to the Greenworks' six, giving users slightly less flexibility in cutting heights.

Ease of Use

The Greenworks mower is designed for ease of use, featuring an instant push-button start and a lightweight design that makes it easy to maneuver. It also requires zero maintenance, eliminating the need for oil changes and gas refills, which is a significant advantage for many users. On the other hand, the SENIX mower, while slightly heavier, is still straightforward to operate and features a quick installation process. However, it does require fuel and maintenance, which may not be suitable for everyone.

Noise and Environmental Impact

One of the standout features of the Greenworks mower is its reduced noise level. It operates at 30% less noise than traditional gas mowers, making it more neighbor-friendly and environmentally conscious. In contrast, the SENIX mower, being gas-powered, produces more noise and emissions, which could be a concern for environmentally conscious homeowners. If noise and environmental impact are critical factors for you, the Greenworks mower is undoubtedly the better choice.

Warranty and Support

The Greenworks 40V mower comes with a worry-free three-year tool and battery warranty, providing significant peace of mind for buyers. This warranty covers both the mower and its battery, ensuring that users can rely on their purchase for several years. The SENIX mower, while offering a two-year warranty, focuses less on battery power and more on traditional gas operations. The longer warranty period of the Greenworks mower adds value, especially for first-time buyers who may be concerned about product longevity.

Which should you buy?

Ultimately, choosing between the Greenworks 40V 17" Cordless Lawn Mower and the SENIX 20" Gas Lawn Mower depends on your specific needs and preferences. If you prioritize quiet operation, ease of use, and a low-maintenance experience, the Greenworks mower is the clear winner. However, if you have a larger yard, need to tackle rugged terrain, and prefer the power of a gas engine, the SENIX mower, priced lower at $199.99, is a compelling option. Each mower has its strengths, so consider your lawn care priorities before making a decision.