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

This post may contain affiliate links. If you purchase through these links, I may receive a small commission at no cost to you. Learn more.

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

21" Steel Deck Gas Lawn Mower, 3-in-1 Push Mower, 144cc 4-Stroke OHV Engine, 6 Height...
  • POWERFUL 144CC 4-STROKE ENGINE- Powered by a 144cc 4-cycle OHV engine, this gas lawn mower starts effortlessly thanks to its auto choke system, while the forced air-cooling mechanism keeps it running...
  • HEAVY-DUTY 21" STEEL CUTTING DECK- A clean, even cut is delivered every time by the 21-inch heavy-duty blade and reinforced steel deck, allowing you to finish faster—exactly what you’d expect from...
PowerSmart Gas Lawn Mower 21-Inch 144cc OHV Engine 3-in-1 Push Mower with Bagging
  • Gas Powered Engine: A 144cc 4-cycle OHV engine equipped with recoil starter and auto choke for easy start, delivers strong power.
  • 3-in-1 Steel Deck: All-steel deck built to last, combine mulching, bagging, and side-discharging capabilities in 1.
AMERISUN 21-Inch 3-in-1 Gas Lawn Mower, Self Propelled with 170cc 4-Stroke Engine,...
  • POWERFUL 170CC 4-STROKE OHV GAS ENGINE - This self propelled gas lawn mower is built for strength and efficiency, providing reliable starting and consistent power to cut through tall, thick grass in...
  • 21-INCH CUTTING DECK WITH 3-IN-1 FUNCTION – Versatile lawn mower design supports side discharge, mulching, and rear bag collection, making it the perfect push mower for yard, garden, and landscaping...
YARDMAX 21 in. 170cc 3-in-1 Gas Walk Behind Push Lawn Mower with High Rear Wheels
  • Single-lever deck adjustment for quickly setting your mow height
  • MAXFlow Deck Technology – volute spiral deck design for better airflow and mulching
PowerSmart 21 in. Gas Lawn Mower with 144cc OHV Engine, 2-in-1 Push Mower with Mulching &...
  • High Efficiency: Equipped with a high-performance 144cc 4-stroke OHV engine and a auto choke for easy starter, delivers reliable power and efficiency.
  • 2-IN-1 Steel Deck: All-steel deck built to last, combine mulch and side-discharge capabilities.

Last update on 2025-09-28 / 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!