PowerSmart 21" Self-Propelled Gas Lawn Mower | 170cc OHV Engine | Rear-Wheel Drive for Slopes | 3-in-1 Bag, Mulch & Discharge | 6 Cutting Heights | Durable Steel Deck| Rear-Wheel Drive | Medium Yard Review

Overview

The PowerSmart 21" Self-Propelled Gas Lawn Mower is a budget-friendly workhorse designed for homeowners with medium-sized, sloped yards who want rear-wheel drive traction without the $500+ price tag of premium brands. Powered by a 170cc OHV engine and riding on a durable steel deck, it offers a 3-in-1 system for bagging, mulching, or side discharging—making it a solid choice for anyone tired of pushing a mower uphill.

Who Should Buy This

1. Homeowners with sloped or hilly lots – The rear-wheel drive system gives you that push-assist on inclines, saving your arms and back from wrestling a front-wheel drive mower uphill.

2. Budget-conscious buyers on 1/4 to 1/3 acre – At $309.99, this mower undercuts most self-propelled gas models from Honda or Toro by a wide margin, while still offering the same core features.

3. DIY landscapers who want simplicity – With a straightforward 6-position height lever and no complicated speed controls, this mower is easy to set up and operate without a manual.

4. Mulch fans who also bag – The 3-in-1 system works well, especially the mulching plug, which keeps clippings fine and leaves a clean look without needing to stop and empty a bag constantly.

Key Features Breakdown

170cc OHV Engine – This is a reliable, overhead-valve engine that starts easier than side-valve alternatives, especially after sitting for weeks. It’s not a Honda GXV, but it’s strong enough to power through thick Bermuda or fescue without bogging down.

21" Steel Deck – Steel is heavier than aluminum, but it’s also more durable against rocks and roots. The 21-inch width is standard for medium yards—wide enough to cover ground quickly, narrow enough to maneuver around flower beds.

Rear-Wheel Drive (RWD) – This is the standout feature at this price point. RWD pushes the mower from behind, which means better traction on slopes and less front-end wandering on uneven ground. It’s not variable-speed, but the single-speed drive is consistent and easy to engage.

6 Cutting Heights (1.25"–3.75") – The lever adjustment is tool-free and offers a decent range for cool-season and warm-season grasses. The lowest setting is aggressive enough for a final fall cut, and the highest works for tall spring growth.

3-in-1 System – The included bag, mulching plug, and side-discharge chute give you options. The bag holds about 1.5 bushels—smaller than premium bags, but adequate for standard weekly cuts. Mulching is where this mower shines: the deck design chops clippings into fine particles that disappear into the lawn.

Self-Propelled Drive – The drive is cable-actuated, meaning you squeeze a lever to engage. It’s simple and reliable, but there’s no variable speed control—just one fixed speed that’s brisk enough for flat ground but might feel fast on steep hills.

Pros

• Excellent value for RWD – You typically have to spend $100–$200 more to get rear-wheel drive on a gas mower. PowerSmart delivers it at a price that undercuts nearly every competitor.
• Easy to start – The engine fires up on the first or second pull cold, thanks to the OHV design and a reliable primer bulb.
• Mulches well – The deck and blade design produce fine clippings that don’t clump, even in slightly damp grass.
• Solid steel deck – No plastic or stamped aluminum here. This deck can take a beating from hidden rocks or roots.
• Tool-free height adjustment – The single-lever system is intuitive and quick. No need to stop and fiddle with individual wheel pins.
• Light enough to lift – At roughly 65 pounds, it’s not a featherweight, but you can lift it into a truck bed or over a curb without straining.

Cons

• Single-speed drive – There’s no variable speed control, so you’re stuck with one pace. On steep hills, it can feel too fast; on flat ground, it’s fine. Adjustable speed would be a welcome upgrade.
• Bag is a bit small – At 1.5 bushels, you’ll be emptying frequently if you bag tall or wet grass. A 2-bushel bag would reduce trips.
• Plastic wheel adjusters – The height adjustment lever and some wheel components are plastic. They work fine, but they’re not as robust as metal parts found on pricier mowers.
• No washout port – Cleaning the underside requires tipping the mower or using a hose manually. A port would make debris removal easier.

Bottom Line

The PowerSmart 21" Self-Propelled Gas Lawn Mower is the best budget option for homeowners with sloped, medium-sized yards who want rear-wheel drive traction without breaking the bank. It’s not as refined as a Honda HRX or a Toro Super Recycler—the single-speed drive and small bag are real trade-offs—but for $310, you get a reliable engine, a durable deck, and excellent mulching performance. If your yard is flat and under 1/4 acre, you might be fine with a cheaper push mower. But if you’ve got hills and a medium lot, this PowerSmart is a smart, cost-effective choice.

Frequently Asked Questions

Q: Is the self-propelled drive strong enough for steep hills?
A: Yes, the rear-wheel drive provides good traction on slopes up to about 15–20 degrees. The single-speed drive is brisk, so you’ll want to walk at a steady pace. On very steep hills, you may need to disengage the drive and push manually to maintain control.

Q: How hard is assembly out of the box?
A: It takes about 20–30 minutes. You’ll attach the handle (two bolts), install the wheels (they come off for shipping), and add the bag and chute. No special tools are needed beyond the included wrench. The manual is clear, but watch a YouTube video if you’re unsure.

Q: Can I use this mower for thick, wet grass without clogging?
A: The mulching mode handles damp grass reasonably well, but for heavy, wet clumps, use the side-discharge chute. The engine has enough torque to power through, but the deck can clog if grass is too thick and wet. For best results, mow when grass is dry.