I prefer nine of the best medium self-propelled mowers for 2026 to help you choose the right 21–22 inch model. You’ll see how cordless brushless options like Greenworks 80V, 60V, and 40V stack up against gas picks from SENIX, YARDMAX, and PowerSmart.
I cover runtime, deck design, drive types, and simple upkeep in plain language. You’ll also get clear notes on bagging, mulching, slope handling, traction, and noise so you can match a mower to your yard.
| Greenworks 80V 21″ Self-Propelled Cordless Lawn Mower |
| Best Battery Power | Cutting Width: 21 inches | Drive Type: Rear-wheel self-propelled (variable speed) | Power Source: 80V lithium-ion battery (included) | VIEW LATEST PRICE | Read Our Analysis |
| SENIX 21″ Self-Propelled Gas Lawn Mower |
| Reliable Gas Performer | Cutting Width: 21 inches | Drive Type: Front-wheel self-propelled (single speed) | Power Source: Gas (Briggs & Stratton 140cc) | VIEW LATEST PRICE | Read Our Analysis |
| 21-Inch 3-in-1 Self-Propelled Gas Lawn Mower |
| Heavy-Duty Workhorse | Cutting Width: 21 inches | Drive Type: Self-propelled drive | Power Source: Gas (170cc OHV) | VIEW LATEST PRICE | Read Our Analysis |
| Greenworks 40V 21″ Self-Propelled Cordless Lawn Mower |
| Best Midrange Battery | Cutting Width: 21 inches | Drive Type: Rear-wheel self-propelled (variable speed) | Power Source: 40V lithium-ion battery (includes 5.0Ah battery) | VIEW LATEST PRICE | Read Our Analysis |
| YARDMAX 22″ 201cc Self-Propelled High-Wheel Lawn Mower |
| Best Traction & Control | Cutting Width: 22 inches | Drive Type: Front-wheel self-propelled (FWD) with CVT 6-speed | Power Source: Gas (201cc engine) | VIEW LATEST PRICE | Read Our Analysis |
| 21″ Self-Propelled Steel Deck Lawn Mower 170cc |
| Durable Steel Deck | Cutting Width: 21 inches | Drive Type: Self-propelled drive | Power Source: Gas (170cc OHV) | VIEW LATEST PRICE | Read Our Analysis |
| Greenworks 60V 21″ Self-Propelled Cordless Lawn Mower |
| Best Run-Time Value | Cutting Width: 21 inches | Drive Type: Rear-wheel self-propelled (on-the-go pace adjust) | Power Source: 60V lithium-ion battery (2 × 4.0Ah included) | VIEW LATEST PRICE | Read Our Analysis |
| 40V Cordless Self-Propelled 18.5″ Brushless Lawn Mower |
| Compact & Efficient | Cutting Width: 18.5 inches | Drive Type: Self-propelled drive (variable speed 1.3–2.9 MPH) | Power Source: 40V cordless (2 × 20V batteries included) | VIEW LATEST PRICE | Read Our Analysis |
| PowerSmart 21″ Self-Propelled Lawn Mower (140cc) |
| Easy-Start Classic | Cutting Width: 21 inches | Drive Type: Self-propelled drive | Power Source: Gas (140cc Briggs & Stratton) | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Greenworks 80V 21″ Self-Propelled Cordless Lawn Mower
Should you want a reliable, quieter alternative to gas mowers for a medium lawn, the Greenworks 80V 21″ self-propelled mower is a smart pick. You’ll enjoy a brushless motor that gives 30% more torque and runs much quieter than gas, so mornings feel calm. The 21 inch steel deck and rear-wheel variable speed drive help you cut evenly and maneuver around beds. You can mulch, bag, side discharge, or use turbo leaf pickup, and an LED light lets you start sooner or finish late. The 4.0Ah battery cuts up to half an acre and fits other 80V tools.
- Cutting Width:21 inches
- Drive Type:Rear-wheel self-propelled (variable speed)
- Power Source:80V lithium-ion battery (included)
- Cutting Modes / 3-in-1 or 4-in-1:4-in-1 (mulch, bag, side discharge, turbo leaf pickup)
- Deck Material:21″ steel deck
- Height Adjustment Positions:Multi-position (unspecified count) via variable deck height
- Additional Feature:Includes 4.0Ah 80V battery
- Additional Feature:LED headlight included
- Additional Feature:Brushless motor torque
SENIX 21″ Self-Propelled Gas Lawn Mower
Provided that you care about getting reliable power and easy handling for a medium sized yard, the SENIX 21″ self-propelled gas mower is a smart pick that’s built for everyday homeowners who want less fuss and more comfort. You’ll like the 140 cc Briggs & Stratton engine that starts with Prime N Pull and runs smoothly with low vibration. The front wheel drive moves at a steady single speed, and the 8 inch front and 11 inch rear wheels grip rough ground well. You get a 3-in-1 steel deck with a 16 gallon bagger, six height settings, ergonomic handle, oil included, and a two year warranty.
- Cutting Width:21 inches
- Drive Type:Front-wheel self-propelled (single speed)
- Power Source:Gas (Briggs & Stratton 140cc)
- Cutting Modes / 3-in-1 or 4-in-1:3-in-1 (mulch, side discharge, rear bagging)
- Deck Material:Steel deck (3-in-1 steel deck)
- Height Adjustment Positions:6-position dual-lever (1.25″–3.75″)
- Additional Feature:140cc Briggs & Stratton
- Additional Feature:Prime N Pull start
- Additional Feature:16-gallon bagger included
21-Inch 3-in-1 Self-Propelled Gas Lawn Mower
Should you want a reliable mower that handles medium to large yards without fuss, this 21-inch 3-in-1 self-propelled gas mower is a strong choice. You get a 170cc 4-stroke OHV engine that starts easy and keeps steady power through tall, thick grass. The 21-inch deck offers side discharge, mulching, and rear bag collection, and you can pick from six cutting heights between 1.5 and 3.9 inches for a neat finish. With a self-propelled drive, 10-inch rear wheels, foldable handle, heavy-duty steel deck, and 1.4-bushel catcher, it’s ready quickly and stores compactly.
- Cutting Width:21 inches
- Drive Type:Self-propelled drive
- Power Source:Gas (170cc OHV)
- Cutting Modes / 3-in-1 or 4-in-1:3-in-1 (side discharge, mulching, rear bag)
- Deck Material:21″ steel deck (heavy-duty steel)
- Height Adjustment Positions:6-position (1.5″–3.9″)
- Additional Feature:170cc OHV engine
- Additional Feature:Foldable handle design
- Additional Feature:1.4-bushel grass catcher
Greenworks 40V 21″ Self-Propelled Cordless Lawn Mower
Should you want a mower that’s easy to handle on medium yards and often feels quieter than a gas model, the Greenworks 40V 21″ self-propelled cordless mower is a great fit for you. You’ll notice the brushless motor runs longer, with more torque and much less noise, so mowing feels calm. The 21-inch steel deck gives an even cut, and rear-wheel drive plus variable speed control help you steer uphill or around trees. Bright LED light lets you mow at dawn or dusk without waking neighbors. It includes a 5.0Ah battery, fast charger, grass bag, and a three-year warranty.
- Cutting Width:21 inches
- Drive Type:Rear-wheel self-propelled (variable speed)
- Power Source:40V lithium-ion battery (includes 5.0Ah battery)
- Cutting Modes / 3-in-1 or 4-in-1:4-in-1 (mulch, bag, side discharge, turbo leaf pickup)
- Deck Material:21″ steel deck
- Height Adjustment Positions:Multi-position (unspecified count) via single-lever adjustment
- Additional Feature:Includes 5.0Ah battery
- Additional Feature:3-year tool/battery warranty
- Additional Feature:Turbo leaf pickup mode
YARDMAX 22″ 201cc Self-Propelled High-Wheel Lawn Mower
Should you want a mower that makes mid-size yards feel easy, the YARDMAX 22″ 201cc self-propelled high-wheel model is built for you. You’ll like the 22-inch deck that covers ground fast while the 201cc engine delivers steady power. You can mulch, bag, or side discharge, so you’ll handle grass any way you prefer. The CVT with six-speed lever helps you match pace to your walk, and front-wheel drive plus high wheels with spiked rubber tires give sure footing. An automatic choke starts without fuss, a single lever sets deck height, and a cleanout port keeps the underside tidy.
- Cutting Width:22 inches
- Drive Type:Front-wheel self-propelled (FWD) with CVT 6-speed
- Power Source:Gas (201cc engine)
- Cutting Modes / 3-in-1 or 4-in-1:3-in-1 (mulch, bagging, side discharge)
- Deck Material:(Implied) steel deck (22″ cutting deck)
- Height Adjustment Positions:Single-lever deck height adjustment (select PACE; exact positions implied multiple)
- Additional Feature:201cc Select PACE CVT
- Additional Feature:6-speed CVT control
- Additional Feature:Aggressive spiked tires
21″ Self-Propelled Steel Deck Lawn Mower 170cc
Should you have a medium-sized yard with thick grass and want a mower that does the hard work for you, this 21 inch self-propelled steel deck mower is a great fit. You’ll get a 170cc OHV engine with forced air cooling, so power stays steady and the unit runs longer between fills. The 21 inch steel deck clears wide swaths, and the 3-in-1 system lets you mulch, side discharge, or use the 1.4 bushel bag. You’ll appreciate 7 inch front and 10 inch rear wheels for stable handling and a single-lever height adjuster with six settings.
- Cutting Width:21 inches
- Drive Type:Self-propelled drive
- Power Source:Gas (170cc OHV)
- Cutting Modes / 3-in-1 or 4-in-1:3-in-1 (mulching, side discharge, rear bag)
- Deck Material:21″ steel deck
- Height Adjustment Positions:6-position single-lever (1.5″–3.9″)
- Additional Feature:Forced air cooling
- Additional Feature:Quick minimal assembly
- Additional Feature:Easy-access maintenance
Greenworks 60V 21″ Self-Propelled Cordless Lawn Mower
In case you want a quiet, low-stress mower that still handles big yards and tough grass, the Greenworks 60V 21″ self-propelled cordless mower fits the bill. You’ll get instant starts, zero emissions, and a brushless motor that pulls through thick patches. It uses two 4.0Ah batteries on a 60V platform for about 45 minutes of runtime, and the rapid dual-port charger tops them fast. You control rear-wheel self-propelled drive with on-the-go pace adjustment, and the 21″ deck offers mulch, bag, side discharge, and turbo leaf pickup. It runs three times quieter, has an LED light, and includes a grass bag and long warranties.
- Cutting Width:21 inches
- Drive Type:Rear-wheel self-propelled (on-the-go pace adjust)
- Power Source:60V lithium-ion battery (2 × 4.0Ah included)
- Cutting Modes / 3-in-1 or 4-in-1:4-in-1 (mulch, bag, side discharge, turbo leaf pickup)
- Deck Material:21″ cutting deck (implied steel)
- Height Adjustment Positions:Multi-position (on-the-go pace adjustment and deck height options)
- Additional Feature:Includes 2×4.0Ah batteries
- Additional Feature:Rapid dual-port charger
- Additional Feature:4-year tool/battery warranty
40V Cordless Self-Propelled 18.5″ Brushless Lawn Mower
In case you want a quiet, low-maintenance mower that still packs real power, this 40V cordless self-propelled 18.5 inch brushless model is built for homeowners with medium yards who value ease and consistency. You’ll notice the brushless motor spins faster than many gas units, driven through Easysurge tech and a SurgePanel for smooth operation. It uses two 20V batteries with a rapid charger, giving about 30 minutes per charge for roughly one sixth acre. You get an 18.5 inch deck, six-position one touch height adjust, variable drive speeds, and a folding T handle for compact storage and easy bag removal.
- Cutting Width:18.5 inches
- Drive Type:Self-propelled drive (variable speed 1.3–2.9 MPH)
- Power Source:40V cordless (2 × 20V batteries included)
- Cutting Modes / 3-in-1 or 4-in-1:(Primary) bag and discharge; details emphasize collection and cut-height — electric design with bagging/collection features
- Deck Material:18.5″ cutting deck (material not explicitly stated; deck described as cutting deck for electric mower)
- Height Adjustment Positions:6-position electric cutting height adjustment (one-touch)
- Additional Feature:Easysurge high RPM motor
- Additional Feature:One-touch 6-position height
- Additional Feature:Foldable T-handle
PowerSmart 21″ Self-Propelled Lawn Mower (140cc)
You’ll love the PowerSmart 21″ self-propelled mower provided you want a reliable machine that makes yard work feel easier and more manageable. You get a 140cc Briggs & Stratton EX550 engine that starts instantly with an easy-pull recoil and auto choke, so you won’t fuss with a primer bulb. The 21-inch alloy steel deck stands up to wear and covers lots of ground fast. Six cutting heights let you switch from low trim to higher seasonal cuts. Three-in-one options bag, mulch, or rear discharge for tidy clippings or soil enhancement. It’s built to be simple, sturdy, and versatile.
- Cutting Width:21 inches
- Drive Type:Self-propelled drive
- Power Source:Gas (140cc Briggs & Stratton)
- Cutting Modes / 3-in-1 or 4-in-1:3-in-1 (bagging, mulching, rear discharge)
- Deck Material:21″ heavy-duty alloy steel deck
- Height Adjustment Positions:Six adjustable cutting heights (range not specified)
- Additional Feature:Briggs & Stratton EX550
- Additional Feature:Auto choke starting
- Additional Feature:Heavy-duty alloy steel deck
Factors to Consider When Choosing Medium Sized Self-Propelled Lawn Mowers
Whenever I’m choosing a medium sized self-propelled mower, I initially consider the power source and runtime because that affects how long I can mow without interruptions. I also weigh cutting deck size, drive type and control, and cutting height options since they determine how clean and fast my yard will look. Finally, I check maintenance needs and warranty so I won’t be stuck with surprise work or costs down the road.
Power Source & Runtime
Although the power source could seem like a simple choice, I want you to contemplate how it will change every mowing task you do. I weigh gas versus battery through reflecting about runtime and rhythm. Gas gives me continuous work as long as I have fuel, so I don’t stop mid-job on larger yards. Battery mowers are quieter and cleaner, and they tell me how long I can mow, often 30 to 60 minutes per charge for medium decks. I check voltage and amp hours together since higher numbers mean more power and longer runtime, and I look for manufacturer coverage estimates. I also deliberate charging time, charger type, and whether I can swap spare batteries or use an interchangeable battery ecosystem to keep going.
Cutting Deck Size
A medium cutting deck usually sits between 20 and 22 inches, and I want to help you see why that range matters for day-to-day mowing. I pick this size because it balances coverage per pass with easy turning around trees and flower beds. Should you choose a wider 22 inch deck you’ll finish faster, but expect tighter handling and more storage space needs. Deck width also affects required power, so consider engine or battery strength for thick or tall grass. Material matters too. Steel lasts longer and resists dents, while stamped alloy can save weight. Deck shape, blade design, and discharge options work together to lift grass and improve cut quality. I’ll help you weigh these trade offs for your yard.
Drive Type & Control
Because good control makes mowing feel easier and safer, I want to walk you through how drive type and speed controls change your daily ride. I like to match drive layout to my yard. Rear wheel drive grips hills and thick grass because the drive wheels carry weight and pull the deck. Front wheel drive turns tight on flat lawns and feels nimble, but it can slip on slopes. All wheel drive or variable traction gives me confidence on mixed terrain and in wet spots. I prefer variable speed controls so I pace with the turf and avoid tiring. Transmission choice matters too. Single speed is simple, multi speed adds steps, and CVT keeps momentum on inclines smoothly, helping cut consistency.
Cutting Height Options
Whenever you want a clean, healthy lawn, cutting height matters more than most people realize, so I always check how many settings a mower offers and how easy they are to change. I look for at least five to six distinct positions so I can handle fine turf, taller growth, and recovery after stress. I prefer ranges that cover about 1.25 to 3.9 inches so low and high needs are met. A single-lever or single-point adjustment saves time through moving all wheels at once. I also like finer incremental steps for precise leveling and a neater cut on uneven ground. Finally, I choose tool-free or foot-operated adjustments since I change heights often across seasons and conditions.
Maintenance & Warranty
After you set the cutting height, you’ll need to make sure the mower stays reliable through regular care and solid warranty protection, because how you maintain the machine affects performance as much as how you set it. I check warranty length and details initially, and I look for at least two to three years on the mower plus separate coverage for the engine or battery. Then I follow a maintenance schedule: seasonal tune ups, sharpen blades every 20 to 25 hours, inspect belts, and log every service. For gas models I change oil every 25 to 50 hours, replace air filters, and check spark plugs. For battery models I store cells cool, avoid deep discharge, and replace batteries per life cycles. I keep receipts to protect claims.
