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 warranty, SENIX 20" Gas Lawn Mower, 144 cc Gas Powered wins on noise level and weight.
The Greenworks mower offers a quieter, eco-friendly experience, while the SENIX provides more power and cutting width at a lower price.
Why Greenworks 40V 17" Cordless Lawn Mower – Brushless is better
Quieter Operation
30% less noise than gas mowers
Low Maintenance
No oil changes or fumes
Longer Warranty
3-year warranty on tool and battery
Why SENIX 20" Gas Lawn Mower, 144 cc Gas Powered is better
Lower Price
$208.99 vs $279.99
Wider Cutting Width
20-inch vs 17-inch
Powerful Engine
144cc gas engine for tough grass
Overall score
Specifications
| Spec | Greenworks 40V 17" Cordless Lawn Mower – Brushless | SENIX 20" Gas Lawn Mower, 144 cc Gas Powered |
|---|---|---|
| Power Source | Battery | Gas |
| Engine Size | N/A | 144cc |
| Cutting Heights | 6 | 3 |
| Weight | 40 lbs | 50 lbs |
| Warranty | 3 years | 2 years |
Dimension comparison
Overview of the Greenworks 40V 17" Cordless Lawn Mower
The Greenworks 40V 17" Cordless Lawn Mower is an innovative and eco-friendly option for homeowners looking for a quiet and efficient way to maintain their lawn. Priced at $279.99, this mower features a powerful brushless motor and a 4.0Ah battery, providing up to 35 minutes of runtime on a single charge. With its 6 adjustable cutting heights, it is well-suited for various grass types and offers the convenience of mulching or bagging clippings. The Greenworks model is also lightweight and easy to maneuver, making it ideal for small to medium-sized yards of up to 1/4 acre.
Overview of the SENIX 20" Gas Lawn Mower
The SENIX 20" Gas Lawn Mower presents a robust gas-powered option, priced at $208.99, making it about 17% cheaper than the Greenworks model. This mower is powered by a 144cc engine, delivering reliable performance for cutting through thick grass and uneven terrain. Its 20-inch cutting width allows for greater coverage in a single pass compared to smaller models. With three adjustable cutting heights and lightweight design, the SENIX mower promises efficiency and adaptability for various lawn conditions, making it a versatile choice for garden maintenance.
Power and Performance Comparison
Power and performance are critical when choosing a lawn mower. The Greenworks mower leverages a brushless motor, offering a quieter operation—30% less noise than gas mowers. It provides instant push-button starts and zero maintenance, which is appealing for those seeking convenience. In contrast, the SENIX mower's 144cc gas engine is designed for dependable power, making it effective for cutting through challenging grass. Its ability to handle slopes and rough terrain is a definite advantage for users with diverse lawn conditions. Both mowers are designed with efficiency in mind, but their power sources cater to different user preferences.
Cutting Width and Height Options
When it comes to cutting width and height, the SENIX mower has the upper hand with its 20-inch cutting width, allowing for faster mowing by covering more ground in each pass. This feature significantly enhances operational efficiency, especially for larger yards. In comparison, the Greenworks mower has a narrower 17-inch cutting width but offers 6 adjustable cutting heights, allowing for versatility in lawn care. This adaptability can be particularly useful for homeowners who have varying grass types or overgrown areas in their yards. Ultimately, the choice may depend on individual lawn size and grass conditions.
Maneuverability and Design
Maneuverability is a crucial factor for ease of use in lawn mowers. The Greenworks mower is lightweight and designed for easy pushing, making it suitable for users who prefer a more effortless mowing experience. It operates quietly, which can be an advantage in residential areas. On the other hand, the SENIX mower features a 7-inch wheel design that enhances maneuverability over uneven surfaces, reducing strain on the user. This design allows it to glide smoothly over bumpy patches and slopes. Therefore, those with varied terrain might find the SENIX mower more accommodating, while the Greenworks model may appeal to those looking for a quieter experience.
Maintenance and Warranty
Maintenance requirements are a significant aspect of lawn mower ownership. The Greenworks mower, being cordless and electric, requires no oil changes, fumes, or pull cords, making it a low-maintenance option. It also comes with a worry-free 3-year warranty for both the tool and battery, ensuring long-term reliability. Conversely, the SENIX mower features a more traditional gas engine, requiring standard maintenance like fuel management and occasional oil changes. However, it does offer a 2-year warranty, providing some reassurance for buyers. Users prioritizing minimal upkeep may gravitate towards the Greenworks mower, while those comfortable with gas engines might prefer the SENIX model.
Environmental Considerations
Environmental impact is increasingly influencing consumer choices. The Greenworks mower operates on a battery, producing no emissions, making it an environmentally friendly option. Its quieter operation also contributes to reduced noise pollution in neighborhoods. In contrast, the SENIX mower, with its gas engine, emits fumes, which may be less appealing to eco-conscious buyers. However, gas-powered mowers like the SENIX can be advantageous for users who prioritize torque and power, especially in challenging mowing scenarios. Ultimately, the choice between these two mowers may be influenced by personal values regarding environmental sustainability.
Which should you buy?
Deciding between the Greenworks 40V 17" Cordless Lawn Mower and the SENIX 20" Gas Lawn Mower ultimately depends on individual needs and preferences. If you value a quieter, eco-friendly option with low maintenance, the Greenworks mower is a compelling choice despite its higher price of $279.99. Conversely, if you prioritize power, cutting width, and a lower upfront cost of $208.99, the SENIX mower may be the better fit. Consider your lawn size, terrain, and maintenance preferences to make the best decision for your mowing needs.

