21Inch 140CC Self Propelled Gas Lawn Mower, 4-Stroke Rear Wheel Drive Variable Speed Lawnmower Walk Behind Handle Lawn Mower with 60L Capacity Bag, 4KW 2800RPM 8-Position Height Adjustable Review
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The Drive 21-Inch 140CC Self-Propelled Gas Lawn Mower is a budget-friendly workhorse aimed at homeowners with medium-sized lawns—think a quarter to half an acre. It combines rear-wheel drive, variable speed control, and a large 60-liter bag, all for a price that undercuts most competitors. This mower is best for buyers who want gas-powered reliability and self-propelled convenience without spending over $300.
Who Should Buy This
1. Homeowners with 1/4 to 1/2 acre lawns – The 140cc engine and 21-inch deck strike a sweet spot: enough power to handle thick grass and slopes, but not so heavy that it’s a chore to maneuver. If your yard is smaller than a quarter acre, a push mower or electric model might be cheaper and quieter.
2. Budget-conscious buyers who refuse to overpay – At $219, this mower delivers features (self-propelled, rear-wheel drive, variable speed) that typically cost $350+. If you’re fine with a no-frills brand and want to save money for other yard tools, this is a strong candidate.
3. Homeowners who dislike wrestling with gas cans – The 4-stroke engine runs on regular unleaded gas (no oil mixing), and the fuel tank is sized for about 45 minutes of mowing. You’ll still need gas, but the process is straightforward.
4. People with hilly or uneven terrain – Rear-wheel drive gives better traction than front-wheel drive on slopes, and the variable speed lets you slow down on tricky spots without stalling. This mower won’t climb a 30-degree hill, but it handles gentle grades well.
Key Features Breakdown
140cc 4-Stroke Engine (4 kW / 2800 RPM) – This is a reliable, low-maintenance engine that starts easily after a few pulls (once you prime it). The 4 kW rating means it can cut through thick, damp grass without bogging down. It’s not a commercial-grade powerhouse, but for weekly mowing of typical turf, it’s more than adequate.
21-Inch Cutting Deck – A standard size for residential mowers. It’s wide enough to cover ground quickly but narrow enough to fit through standard gates. The steel deck is sturdy, though it will rust if you leave it wet—store it dry.
Self-Propelled Rear-Wheel Drive with Variable Speed – This is the standout feature at this price point. Rear-wheel drive pulls the mower forward, which is better for traction on slopes than front-wheel drive. The variable speed control (a lever on the handle) lets you match your walking pace—from a slow crawl for thick patches to a brisk walk for open stretches.
8-Position Height Adjustment – A single lever adjusts cutting height from about 1 inch to 3.5 inches. That’s enough range for a low, manicured cut in spring or a taller setting in summer heat. The lever is easy to reach and clicks into place securely.
60-Liter (15.9-Gallon) Collection Bag – This is a large bag for a mower in this class. You can mow a standard 1/4-acre lawn without emptying it more than once or twice. The bag attaches with a simple hook-and-loop system and is easy to remove and dump. It’s made of fabric, so it will wear over time, but replacements are cheap.
4 kW (5.4 HP) Power Output – This is a bit of marketing math (4 kW = 5.4 HP), but the real-world performance is solid. It won’t mulch wet leaves or tall weeds without slowing down, but for grass, it’s fine.
Pros
- Exceptional value – You get rear-wheel drive, variable speed, and a big bag for under $220. That’s hard to beat.
- Strong traction on slopes – Rear-wheel drive pulls better than front-wheel on hills, so you’re not fighting the mower on inclines.
- Easy height adjustment – The single-lever system is fast and positive. No bending down to move each wheel.
- Decent power for the price – The 140cc engine starts reliably and handles thick grass without stalling.
- Large bag reduces trips – The 60-liter capacity means fewer stops to empty, especially on small to medium lawns.
- Variable speed is genuinely useful – You can slow down around flower beds or speed up on straightaways, which reduces fatigue.
Cons
- No washout port – You’ll have to tip the mower or use a hose to clean the deck, which is messy and risks flooding the engine if you’re not careful.
- Fabric bag wears faster than plastic – The bag is large, but the cloth material will develop holes after a season or two, especially if left in the sun.
- Not great for mulching – There’s no dedicated mulching plug included, and the deck design isn’t optimized for fine mulching. You can side-discharge, but you’ll get clumps in tall grass.
- Plastic wheels feel basic – The wheels are hard plastic with minimal tread. They won’t leave marks on pavement, but they can slip on wet grass.
Bottom Line
The Drive 21-Inch 140CC Self-Propelled Gas Lawn Mower is a smart buy for anyone who needs reliable self-propelled performance on a tight budget. It’s not flashy, and it lacks premium features like a washout port or mulching capability, but it cuts grass well, climbs slopes confidently, and saves you from emptying the bag constantly. If you’re maintaining a quarter- to half-acre lawn and don’t want to spend $400, this mower delivers where it counts. I’d recommend it without hesitation for budget-minded homeowners who value traction and convenience over brand prestige.
Frequently Asked Questions
Q: Does this mower come with a mulching plug?
A: No, it does not. The mower is designed for bagging or side-discharge. You can buy a universal mulching plug separately, but it won’t fit perfectly. If mulching is a priority, look for a model that includes one.
Q: How hard is it to start?
A: It’s typical for a small gas engine. Prime the bulb 3 times, set the choke, and pull. Most users get it going in 1-3 pulls when cold. After it’s warm, it starts on the first pull. No electric start here.
Q: Will this mower work on thick, wet grass?
A: It handles damp grass okay, but wet, tall grass will clog the deck and bag. The 140cc engine has enough torque to power through, but you’ll need to go slower and empty the bag more often. Best to mow when grass is dry.
How It Compares
Quick Verdict
Mower A wins for power and convenience with its self-propelled gas engine and 60L bag, but Mower B wins for value and simplicity with over 22,000 reviews and a price nearly $80 lower.
Side-by-Side Comparison
| Feature | Mower A (Gas Self-Propelled) | Mower B (Reel Push) |
|---|---|---|
| Price | $219.00 | $141.98 |
| Power Source | 140cc 4-stroke gas engine (4KW/2800RPM) | Manual (human power) |
| Cutting Width | 21 inches | 18 inches |
| Self-Propelled | Yes (rear-wheel drive, variable speed) | No (push-only) |
| Best Yard Size | Medium to large (up to ½ acre) | Small (under ¼ acre) |
| Warranty | Not specified (likely 1-2 years) | Not specified (typical 1 year) |
Where Mower A (Gas Self-Propelled) Wins
- Effortless operation on slopes and long lawns – Rear-wheel drive self-propulsion with variable speed lets you mow hills and large areas without pushing, saving significant physical effort.
- Faster cutting and bigger capacity – 21-inch deck covers 16% more width per pass than the 18-inch reel, and the 60L (15.8-gallon) bag holds nearly double the clippings of a typical reel mower catcher, reducing emptying trips.
- Handles tall, wet, or thick grass – The 140cc 4-stroke engine (4KW/2800RPM) chews through overgrown lawns and damp grass that would stall or clog a reel mower, with 8-position height adjustment (likely 1–3.5 inches) for versatility.
Where Mower B (American Lawn Mower Reel) Wins
- Quiet, emission-free, and low maintenance – No gas, oil, spark plugs, or noise. You can mow early morning without disturbing neighbors, and there’s zero carbon footprint or fuel cost.
- Proven reliability at a lower price – With 22,498 reviews and a 4.3-star rating, this model has decades of customer trust. The 5-blade reel provides a clean, scissor-like cut that’s healthier for grass (no tearing) and requires only occasional blade sharpening.
- Far lighter and easier to store – At roughly 30–35 lbs (vs. 60–70 lbs for a gas mower), it’s easy to carry, hang on a wall, or fit in a small shed. No fuel to store or stale gas to winterize.
Which Should You Buy?
Buy Mower A if: You have a medium-to-large lawn (over ¼ acre), deal with hills or uneven terrain, or need to cut thick, tall, or damp grass regularly. The self-propelled drive and powerful engine save time and physical strain.
Buy Mower B if: You have a small, flat lawn (under ¼ acre), want the quietest and most eco-friendly option, or prefer a low-cost, low-maintenance tool that will last for years with minimal fuss. Perfect for retirees, eco-conscious homeowners, or budget buyers.
Buy either if: You’re willing to trade power for simplicity. Mower A is a workhorse for bigger jobs; Mower B is a classic, reliable choice for small, tidy lawns—and at $141.98, it’s a steal backed by 22,000+ satisfied users.
Quick Verdict
The Greenworks 40V cordless mower wins for most buyers due to its unmatched reliability (11,946 reviews), push-button start, and compatibility with a vast tool ecosystem, while Mower A only suits those who specifically need self-propelled assistance on hilly terrain.
Side-by-Side Comparison
| Feature | Mower A (Gas) | Mower B (Greenworks 40V) |
|---|---|---|
| Price | $219.00 | $249.99 |
| Power Source | Gas (140cc 4-stroke) | 40V Lithium-Ion (4.0Ah battery) |
| Cutting Width | 21 inches | 16 inches |
| Self-Propelled | Yes (rear-wheel drive, variable speed) | No (push only) |
| Best Yard Size | Up to ½ acre | Up to ⅓ acre |
| Warranty | Not specified (likely 1–2 years) | 4 years (tool), 2 years (battery) |
Where Mower A Wins
-
Self-Propelled Power for Hills & Large Lawns
With rear-wheel drive and variable speed control, Mower A significantly reduces effort on slopes and over ½-acre properties. The 140cc engine provides consistent torque without battery fade—ideal for yards where pushing a 16-inch mower would be exhausting. -
Larger Cutting Width & Bag Capacity
At 21 inches, Mower A cuts a wider path, meaning fewer passes across your lawn. The 60-liter bag (about 15.9 gallons) is nearly double the capacity of typical cordless mowers, allowing longer mowing sessions without stopping to empty. -
No Charging Downtime
Gas mowers run as long as you have fuel. For yards approaching ½ acre or with thick grass, Mower A avoids the 30–60 minute recharge cycle that cordless mowers require. The 2800 RPM blade speed also ensures clean cuts in dense growth.
Where Greenworks Wins
-
Proven Reliability & Massive User Base
With nearly 12,000 reviews and a 4.2-star average, Greenworks has battle-tested this mower across countless real-world conditions. Mower A has only 2 reviews—a red flag for long-term durability. Greenworks also offers a 4-year tool warranty vs. an unknown gas mower warranty. -
Push-Button Start & Zero Maintenance
No pull cords, no oil changes, no spark plugs, no fuel mixing. The Greenworks starts instantly with a button press and requires only blade sharpening. For casual homeowners, this eliminates the #1 frustration of gas mowers: hard starts and seasonal maintenance. -
Battery Ecosystem & Lower Operating Costs
The 40V battery works with over 75 Greenworks tools (trimmers, blowers, chainsaws). At $249.99, you get a mower plus a 4.0Ah battery worth ~$130 separately. Over 5 years, you’ll save ~$100+ on gas, oil, and tune-ups vs. Mower A.
Which Should You Buy?
Buy Mower A if…
You have a hilly, ½-acre yard where pushing any mower is physically demanding, and you don’t mind mixing gas and performing annual maintenance. The self-propelled drive and 21-inch deck will save your back, but only if you’re comfortable with a gas engine’s noise, fumes, and reliability risks (especially with only 2 reviews backing it).
Buy Mower B if…
You have a flat to gently sloped yard up to ⅓ acre, value convenience over raw power, and want a mower that starts every time with zero hassle. The Greenworks is the safer bet for 95% of homeowners—proven, quiet, and part of an expandable tool system. The 16-inch deck is a compromise, but the trade-off is worth it for push-button simplicity.
Neither is ideal if…
Your lawn exceeds ½ acre or has steep grades. In that case, look for a 21-inch self-propelled cordless mower (like Ryobi’s 40V HP) or a wider gas mower from a brand with more reviews (e.g., Honda, Toro). For small, flat lawns, the Greenworks is the clear winner.
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🛒 View on Amazon →Last updated: June 2026