The PowerSmart 21″ Self-Propelled Lawn Mower is a straightforward gas-powered machine for medium to large yards. It runs on a 140cc BS EX550 engine, which starts reliably thanks to the auto choke system. That matters more than you think. No priming, no flooding, no yanking a cord twenty times. You pull once and it fires up.

The 21-inch alloy steel deck is heavy without being unwieldy. It handles thick, damp grass without bogging down, which is where cheaper electric mowers tend to give up. Six cutting heights range from roughly 1.5 to 3.75 inches, controlled by a single lever at each wheel. You can adjust on the fly without stopping, which saves time when you hit a patch of uneven ground. The self-propulsion system is rear-wheel drive, meaning it pulls itself forward rather than pushing from the front. That gives you better traction on slopes and less wrestling on turns.

One honest limitation: the self-propelled speed is not infinitely variable. You get a fixed gear, so it moves at one pace. That works fine for steady mowing but feels a bit rigid if you like to walk fast. The recoil starter requires a firm, full pull, though the auto choke keeps it simple. For the price, it cuts cleanly and starts every time. That is the real benchmark for a gas mower, and this one clears it.