PowerSmart 18-Inch Gas Lawn Mower, 144cc vs AMERISUN 21-Inch Gas Push Lawn Mower for

Quick Verdict

For most homeowners, the PowerSmart 18-Inch Gas Lawn Mower is the better value, offering solid performance at less than half the price of the AMERISUN. Its higher rating and far more reviews indicate consistent reliability. The AMERISUN 21-Inch model only makes sense if you have a larger yard and need the extra cutting width—but its lower rating and much higher cost make it a harder sell.

Side-by-Side

Where PowerSmart Wins

• Value for money – At $194.96, the PowerSmart is dramatically cheaper. You get the same 144cc engine displacement for less than half the price.
• Customer satisfaction – A 4.3 rating from 518 reviews suggests consistent quality and fewer defects than the AMERISUN’s 3.8 from only 167 reviews.
• OHV engine design – The PowerSmart’s Overhead Valve (OHV) engine typically offers better fuel efficiency and cooler operation compared to the AMERISUN’s standard 4-stroke engine.
• Lighter weight – An 18-inch mower is generally easier to push and maneuver in tight spaces, around flower beds, and through gates.
• Lower maintenance costs – Replacement blades, air filters, and other parts for 18-inch mowers are typically cheaper and more widely available than for 21-inch models.

Where AMERISUN Wins

• Larger cutting width – The 21-inch deck cuts 3 inches more per pass, reducing mowing time by about 15% on open lawns. This is a real advantage for yards over 1/3 acre.
• Better for uneven terrain – A wider deck tends to ride more smoothly over bumps and dips, reducing scalping on uneven ground.
• Potentially more durable build – The higher price point may indicate heavier-duty components such as a steel deck and thicker axles, though this is not confirmed by specs.
• Larger fuel tank – 21-inch mowers often have bigger tanks, meaning fewer refueling stops during long mowing sessions.

Which Should You Buy

Choose the PowerSmart 18-Inch if:

• Your yard is under 1/3 acre
• You want to spend under $200 and still get a reliable gas mower
• You need to maneuver around trees, gardens, or narrow paths
• You prioritize value and proven customer satisfaction over raw cutting width

Choose the AMERISUN 21-Inch if:

• Your yard is between 1/3 and 1/2 acre
• You’re willing to pay double for a wider cut and faster mowing
• You have relatively flat, open terrain where the extra width is fully used
• You don’t mind the lower rating and fewer reviews

For most buyers, the PowerSmart is the smarter choice. The AMERISUN’s extra width doesn’t justify its price premium, especially given its lower customer rating. Only opt for the AMERISUN if you absolutely need that 21-inch deck and can accept the higher cost and risk.