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AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144cc vs WORX Nitro 21" Cordless Lawn Mower, Electric Mower

Updated July 2026 — AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144cc wins on power and weight, WORX Nitro 21" Cordless Lawn Mower, Electric Mower wins on price and runtime.

The AMERISUN offers a budget-friendly option with reliable performance, while the WORX Nitro provides advanced technology and convenience. Choose based on your lawn care needs.

Why AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144cc is better

Price

AMERISUN is $121 cheaper

Weight

AMERISUN is lighter at 68 lbs

Simplicity

Gas mower requires less technology

Why WORX Nitro 21" Cordless Lawn Mower, Electric Mower is better

Power

WORX has a brushless motor with 40% more power

Runtime

WORX offers 50 minutes of runtime

Eco-friendliness

WORX operates without emissions

Overall score

AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144cc
75
WORX Nitro 21" Cordless Lawn Mower, Electric Mower
85

Specifications

SpecAMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144ccWORX Nitro 21" Cordless Lawn Mower, Electric Mower
Engine TypeGasElectric
Self-PropelledNoYes
MulchingYesYes
BaggingYesYes
Height Range1.5-3.9"1.5-4"

Dimension comparison

AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower, 144ccWORX Nitro 21" Cordless Lawn Mower, Electric Mower

Overview

When it comes to lawn mowers, the AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower and the WORX Nitro 21" Cordless Lawn Mower are two strong contenders, each offering unique advantages. The AMERISUN is priced at $238.49, making it about 17% cheaper than the WORX, which retails at $359.99. However, the decision between these two options goes beyond price, as each features distinct capabilities and technologies that cater to different user needs.

Power and Performance

The AMERISUN features a 144cc 4-cycle OHV engine that delivers reliable performance for small to medium-sized lawns. Its gas-powered engine ensures consistent cutting power, ideal for regular yard maintenance. In contrast, the WORX Nitro uses a brushless motor that offers 40% more power and 10% longer runtime compared to earlier models, making it a robust alternative for lawns up to half an acre. With its self-propelled function, the WORX allows users to set their preferred speed up to 3.7 MPH, providing a more comfortable mowing experience on inclines or uneven terrain.

Cutting Deck and Technology

The AMERISUN features a 21-inch durable steel cutting deck that enhances mowing efficiency while providing even coverage. This design is particularly beneficial for users who need a reliable mower for routine lawn care. The WORX Nitro, on the other hand, is equipped with Aerodeck technology, which boosts air volume to improve cut quality and prevents clogs. This technology optimizes efficiency and bag collection, making it a great choice for those who prioritize a clean lawn finish. Both mowers offer a 3-in-1 functionality for mulching, bagging, and side discharge, but the WORX’s aerodynamics give it a competitive edge.

Weight and Maneuverability

Weighing in at 68 lbs, the AMERISUN is lightweight and designed for easy maneuverability, particularly around obstacles in the yard. Its durable 7-inch front and 10-inch rear wheels enhance stability during operation. In contrast, while the WORX does not specify its weight, its self-propelled feature significantly reduces the effort needed to navigate through the yard. The fully collapsible handle of the WORX allows for convenient vertical storage, which is a useful feature for those with limited storage space.

Height Adjustment Features

The AMERISUN offers six position height adjustments ranging from 1.5 to 3.9 inches, allowing users to customize their cutting height based on grass type and seasonal conditions. This flexibility helps achieve a precise cut, whether dealing with short grass or tackling overgrown areas. The WORX Nitro also provides seven height positions, from 1.5 to 4 inches, with a quick adjustment lever for convenience. This feature allows for rapid changes in cutting heights, catering to varying lawn conditions without hassle.

Battery and Runtime

The AMERISUN operates on a gas-powered engine, which means users need to manage fuel levels and maintenance. Conversely, the WORX Nitro is powered by two 20V 5.0Ah PowerShare Pro batteries, offering about 50 minutes of runtime. This battery system not only powers the mower but is also compatible with over 140 other WORX tools, making it a versatile choice for users who own multiple devices. While the AMERISUN may require more upkeep, the WORX provides the convenience of electric operation without emissions.

Environmental Impact

The AMERISUN, being a gas-powered mower, emits fumes and contributes to noise pollution. This can be a significant drawback for users concerned about their environmental footprint. The WORX Nitro, on the other hand, operates without emissions, making it a more eco-friendly choice. Additionally, the quieter operation of electric mowers enhances the mowing experience, allowing users to maintain their lawns without disturbing the neighborhood.

Price Comparison

At $238.49, the AMERISUN offers a more budget-friendly option compared to the WORX Nitro, which is priced at $359.99. This price difference of about $121 makes the AMERISUN a compelling choice for those on a budget or individuals who only require a mower for small to medium-sized lawns. However, the investment in the WORX may justify itself through its advanced features, such as the brushless motor and Aerodeck technology, which contribute to improved efficiency and performance.

Which should you buy?

The decision between the AMERISUN 21-Inch 3IN1 Gas Push Lawn Mower and the WORX Nitro 21" Cordless Lawn Mower ultimately comes down to your specific lawn care needs and preferences. If you prioritize a budget-friendly option with reliable performance for smaller lawns, the AMERISUN might be the best choice for you. However, if you are looking for advanced technology, greater power, and the convenience of electric operation, the WORX Nitro stands out as the superior option, despite its higher price.