21" Self-Propelled Gas Lawn Mower – 170CC 4-Stroke Engine, 7 Cutting Heights, 3-in-1 Mulch/Bag/Discharge, 1.9-Bushel Large Grass Collector, EPA Compliant Review

Overview

The Cutting 21" Self-Propelled Gas Lawn Mower is a budget-friendly, no-frills workhorse aimed squarely at homeowners with small to medium-sized yards—think quarter-acre lots or less. Priced at $329.99, it packs a 170cc 4-stroke engine, seven cutting heights, and a 3-in-1 system for mulching, bagging, or side-discharging. It’s not fancy, but it’s designed to get the job done without breaking the bank.

Who Should Buy This

• Homeowners with 1/4-acre or smaller lawns – This mower’s 21-inch deck and 1.9-bushel bag are ideal for modest yards where you don’t need a commercial-grade beast. You’ll cut quickly without wrestling a too-large machine.
• Budget-conscious buyers upgrading from a push reel mower – If you’re tired of manual labor but can’t stomach a $500+ mower, this is a solid step up. The self-propelled drive saves your arms, and the price leaves room for a future upgrade.
• DIYers who don’t mind basic maintenance – The 170cc engine is simple and EPA-compliant, meaning no ethanol-blend fuel headaches if you use stabilizer. It’s a good fit if you’re comfortable changing oil and cleaning the deck yourself.
• New homeowners on a tight budget – Moving into your first house with a patchy lawn? This mower covers the basics—adjustable height, bagging, mulching—without overwhelming you with features you won’t use.

Key Features Breakdown

170cc 4-Stroke Engine – This is a standard Briggs & Stratton-style overhead valve engine, not a high-end Honda clone. It’s reliable enough for light weekly cuts but will struggle in damp or overgrown grass. Expect to need a few extra passes in thick spots.

21-Inch Cutting Deck – A common size for residential mowers. It’s wide enough to cover ground quickly but narrow enough to maneuver around flower beds and trees. The stamped steel deck is lightweight but can dent if you hit a rock—something to keep in mind on uneven terrain.

7 Cutting Heights (1.5–3.5 inches) – This range covers most grass types. The lower settings work for Bermuda or Zoysia in summer; the higher ones are better for fescue in spring. The adjustment lever is a single-point system, which is convenient but can feel flimsy—don’t force it.

3-in-1 Mulch/Bag/Discharge – The mulching plug is included, which is rare at this price. It chops clippings finely enough to avoid clumping, but the bag tends to fill quickly (1.9 bushels) if you’re mulching wet grass. Side-discharge is fine for tall grass, but you’ll need to watch for wind blowing clippings onto patios.

Self-Propelled Drive – This is a front-wheel-drive system, which means it pulls the mower forward. It works well on flat ground but loses traction on slopes or thick grass. The variable speed control is basic—just a squeeze lever—so you’ll have to adjust your walking pace manually.

1.9-Bushel Grass Collector – That’s about 1.5 standard trash bags’ worth. It’s on the small side, meaning you’ll empty it often on a dense lawn. The bag attaches with a simple hook-and-loop system, which is easy but can detach if you hit a bump.

EPA Compliant – This just means the engine meets current emissions standards. It doesn’t affect performance, but it ensures you won’t have issues reselling it or using it in states with strict emissions laws.

Pros

1. Price is hard to beat – At $329, this is one of the cheapest self-propelled gas mowers you’ll find. Comparable models from Toro or Honda start at $450+.
2. Mulching works well in dry grass – The included plug and blade design produce fine clippings that break down quickly. You can skip bagging on most summer cuts.
3. Lightweight and easy to push – Even with the self-propelled off, the mower weighs around 70 pounds. It’s manageable for most adults to lift into a truck bed or over a curb.
4. Simple height adjustment – The single-lever system lets you change cutting height in seconds without crawling under the deck. It’s not as precise as individual wheel levers, but it’s faster.
5. Engine starts reliably (with fresh fuel) – The primer bulb and choke work as expected. If you use ethanol-free gas and stabilize it, this mower starts on the first or second pull all season.
6. Compact storage – The handle folds flat without tools, so it takes up minimal space in a garage or shed corner.

Cons

1. Self-propelled drive is weak on hills – The front-wheel-drive system struggles on inclines over 15 degrees. If your yard is sloped, you’ll end up pushing more than the mower pulls.
2. Bag is small and finicky – The 1.9-bushel capacity means frequent stops to empty it, especially if you’re bagging wet grass. The attachment hooks can also pop off if you turn too sharply.
3. Deck clogs easily in damp grass – The stamped steel deck lacks the anti-scalp design of pricier mowers. Wet clippings stick to the underside, requiring you to scrape it clean after each use.
4. No washout port – You’ll need to tilt the mower to clean the deck, which risks oil spilling into the air filter. A garden hose attachment would have been a nice addition at this price.

Bottom Line

The Cutting 21" Self-Propelled Gas Mower is a decent entry-level choice for budget-conscious homeowners with flat, small yards who want gas power without a premium price tag. It’s not built for tough conditions—steep slopes, wet grass, or large lawns will frustrate you—but for basic weekly cuts on a quarter-acre or less, it gets the job done. If you can stretch your budget to $400, look at a model with rear-wheel drive and a larger bag. But if $329 is your hard limit, this mower will serve you for a few seasons with proper care.

Frequently Asked Questions

Q: Does this mower come with oil and fuel?
A: No. You’ll need to buy SAE 30 oil (about 20 ounces) and fresh gasoline separately. The engine is shipped dry, so add oil before the first start. Don’t skip this—running it dry will seize the engine.

Q: Can I use this mower on thick St. Augustine or Bahia grass?
A: It’s not ideal. The 170cc engine lacks torque for thick, coarse