The PowerSmart self-propelled gas lawn mower is built for cutting through medium to large lawns where thick or fast-growing grass needs more force than a push or electric mower can deliver.
The 140cc Briggs & Stratton engine, paired with a 21-inch steel deck and rear-wheel drive, makes this a fit for yards with slopes, uneven ground, or thicker turf. Because it runs on a gas engine rather than a battery, you'll need to keep it stocked with fuel and check the oil regularly, a tradeoff for the added cutting power and self-propelled drive.
Specifications
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Engine: 140cc Briggs & Stratton engine for starting and sustained cutting power
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Cutting Width: 21-inch steel deck cutting path
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Cutting Functions: 3-in-1 bagging, mulching, and rear discharge, with a 1.4-bushel grass bag included
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Height Adjustment: Single-lever, 6-position control adjustable from 1.5 to 3.9 inches
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Drive System: Self-propelled rear-wheel drive with 10-inch rear wheels for traction on slopes and uneven terrain
If You're Cutting Thick, Fast-Growing Grass on a Sloped or Uneven Lawn
If your grass grows quickly during peak season or your lot has slopes that make pushing a standard mower a chore, this mower's rear-wheel self-propelled drive and 140cc engine are sized for that kind of cutting load.
The 21-inch deck covers more ground per pass, which matters if you're working a medium to large lot rather than a small, flat yard. If your grass stays short and your lot is small, a self-propelled gas mower of this size is likely more machine than you need.
What to Expect from the PowerSmart Self-Propelled Gas Mower in Real Use
Most owners report this mower starts easily, often on the first pull, even though there's no primer or choke despite what printed instructions might suggest. That detail is labeled directly on the mower itself. Assembly is typically described as quick, often finished in under thirty minutes. The engine and deck combination has cut through grass that previously overwhelmed lighter electric mowers, particularly during fast growth periods.
The self-propelled drive is strong enough that it can pull forward on its own, so keep a firm grip when you first engage it. You'll need to add oil to the engine before first use since it isn't pre-filled. Some owners have noted the rear discharge flap can loosen slightly over time, though this hasn't affected cutting performance.
A few would prefer a lower minimum cutting height and a larger fuel tank than what's included. Overall, it's described as a steady, low-maintenance performer once assembled and properly fueled and oiled.
Real-world performance notes sourced in part from verified Amazon customer purchases.
Frequently Asked Questions
Does this lawn mower require priming or choking to start?
No. This mower starts using a standard recoil pull start without a primer bulb or choke lever. If older printed instructions reference a primer or choke, disregard them. The mower itself has a label clarifying that no priming step is needed before pulling the starter cord.
Does the mower come with oil already in the engine?
No. The engine ships without oil installed, so you'll need to add it yourself before the first start. Check the engine manual included with the mower for the correct oil type and fill capacity, and confirm the oil level before each use throughout the season.
How does the self-propelled drive perform on slopes or uneven ground?
The rear-wheel drive system is geared for traction on slopes and uneven terrain, and it engages with enough force that the mower can move forward on its own once activated. Keep a firm grip on the handle when you first engage the drive, especially on a slope, until you're familiar with how much pull it generates.
