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Best Gas Lawn Mowers Under $400 in 2025: Top Picks for Power & Performance

A gas lawn mower is a great investment for keeping your yard looking sharp, especially if you have a medium to large-sized lawn. These mowers offer more power, longer run times, and greater cutting efficiency than electric or battery-powered models. The good news? You don’t have to spend a fortune to get a high-quality mower. There are plenty of reliable gas lawn mowers under $400 that provide excellent performance without breaking the bank. In this guide, we’ll highlight the best budget-friendly options and what to look for when making a purchase.

Key Highlights

  • Affordable and powerful: Get a gas mower with strong engine performance for under $400.
  • Ideal for medium to large lawns: More cutting power and longer run times compared to electric mowers.
  • Self-propelled & push options: Choose between manual push or easier self-propelled models.
  • Durable construction: Look for steel decks and reliable engines for long-lasting use.

Discover The Best Gas Lawn Mowers

PowerSmart Self Propelled Gas Lawn Mower, 22 in. with 170cc OHV Engine, 3-in-1...
  • 170CC GAS ENGINE - Equipped with a recoil starter and auto choke, this gas engine is designed to deliver more power for improved cutting efficiency and easy start.
  • SELF-PROPELLED RWD SYSTEM - A rear-wheel-drive system provides great traction on inclined slopes and is suitable for uneven terrain.
  • 22-INCH CUTTING DECK: Durable 22 in. all-steel deck with heavy-duty blade is built to last for durability season after season.
  • BAGGING COLLECTION: The 1.4-bushel rear bag collects more clippings for easy clean up or composting, is easy to empty, saving you time and effort.
AMERISUN 21" Gas Lawn Mower, 144cc Engine, 2-in-1 Mulching & Side Discharge, 6-Position...
  • Efficient Yard Care: With a 21-inch cutting width and robust construction, this gas lawn mower is ideal for small to medium-sized yards, delivering a clean and even cut effortlessly.
  • Strong and Dependable Engine: Powered by a 144cc engine, this mower offers extended engine life, reduced vibration, and easy upkeep. Its pull-start system ensures quick and reliable ignition every...
  • Flexible 2-in-1 Cutting System: The 2-in-1 steel deck provides both mulching and side discharge options, adapting to various lawn care needs. The ergonomic handle design enhances comfort during...
  • Customizable Cutting Height: Featuring a 6-position dual-lever height adjustment (1.5-inch to 3.9-inch), this mower allows for precise cutting. The 7-inch front and 10-inch rear wheels ensure smooth...
PowerSmart Lawn Mower Gas Powered, 18-Inch 144cc Engine 3-in-1 Walk-Behind Push Lawn...
  • Built For Efficiency: The 144cc 4-cycle OHV engine equipped with recoil starter and auto choke for easy start, delivers maximum efficiency in this class of mower.
  • 3-IN-1: Push mower feature offers bagging, side-discharge and mulching capabilities for multiple uses. Easy-to-empty Rear bag collects grass clippings and leaves for easy clean up or composting.
  • Mowing Quality: The 18-inch durable steel deck and the heavy blade provide ultra fine cuts and small clippings, while a vortex tunnel design disperses grass clippings evenly.
  • Easy To Adjust and Maneuver: The 6-position dual lever height adjustment grass cutting height from 1.5 inches to 3.9 inches, and the durable 7-inch wheels provide easy maneuverability in tight spaces.
YARDMAX 22 in. 201cc Select PACE 6 Speed CVT High Wheel RWD 3-in-1 Gas Walk Behind Self...
  • Exclusive and industry-leading CVT (Continuously variable transmission) offers superior speed variability to adjust the mower pace to your walking speed by simply selecting the 6-speed shift...
  • Exclusive rubber tires with aggressive spike tread pattern significantly increases overall traction and maneuverability
  • Easily clean the underside of the cutting deck with the deck cleanout port
  • Single-lever deck adjustment for quickly setting your mow height
AMERISUN 21" Gas Lawn Mower, 144cc Engine, 2-in-1 Mulching & Side Discharge, 6-Position...
  • Efficient Yard Care: With a 21-inch cutting width and robust construction, this gas lawn mower is ideal for small to medium-sized yards, delivering a clean and even cut effortlessly.
  • Strong and Dependable Engine: Powered by a 144cc engine, this mower offers extended engine life, reduced vibration, and easy upkeep. Its pull-start system ensures quick and reliable ignition every...
  • Flexible 2-in-1 Cutting System: The 2-in-1 steel deck provides both mulching and side discharge options, adapting to various lawn care needs. The ergonomic handle design enhances comfort during...
  • Customizable Cutting Height: Featuring a 6-position dual-lever height adjustment (1.5-inch to 3.9-inch), this mower allows for precise cutting. The 7-inch front and 10-inch rear wheels ensure smooth...

Last update on 2025-04-22 / Affiliate links / Images from Amazon Product Advertising API

Types of Gas Lawn Mowers Under $400

TypeBest ForFeatures
Push Gas MowerSmall to medium lawnsLightweight, easy to maneuver, more affordable
Self-Propelled Gas MowerMedium to large lawnsReduces effort, easier to push, adjustable speeds
Mulching & Bagging MowerThose who want yard waste controlMulching function, rear bag for clippings, side discharge option

Smart Tips For Choosing The Right Gas Lawn Mower

Choosing the best gas lawn mower under $400 means balancing power, cutting ability, and convenience. Here’s what to consider:

  • Engine Power: Look for at least a 140cc to 170cc engine for effective cutting power. More power helps tackle thick grass with ease.
  • Cutting Width: A 20 to 22-inch cutting deck is ideal for covering more ground in fewer passes.
  • Push vs. Self-Propelled: Push mowers are more affordable, but self-propelled models make mowing easier, especially on uneven terrain.
  • Height Adjustments: Choose a mower with multiple height settings (usually 5-7) for flexibility in cutting different grass lengths.
  • 3-in-1 Functionality: Some models offer mulching, bagging, and side discharge options for better lawn maintenance.
  • Fuel Efficiency & Maintenance: Look for low-maintenance engines with easy-start technology to avoid frustration when starting the mower.

FAQs About Gas Lawn Mowers

Are gas lawn mowers under $400 durable?

Yes! Many budget-friendly gas mowers have steel decks and reliable engines that last for years with proper maintenance.

Is a self-propelled mower worth it?

If you have a large lawn or hilly terrain, a self-propelled mower makes mowing much easier and reduces fatigue.

How often should I change the oil in a gas lawn mower?

Most gas mowers require an oil change every 25-50 hours of use or at least once per mowing season.

Can I use regular gasoline in a gas lawn mower?

Most gas mowers use unleaded gasoline with an octane rating of 87 or higher. Avoid ethanol blends over 10% (E10) to prevent engine issues.

A high-quality gas lawn mower under $400 can give you the power and performance needed for a clean, well-manicured lawn. Pick one that fits your yard size and mowing needs, and enjoy effortless lawn care!