AMERISUN 21 Inch Gas Push Lawn Mower, 2-in-1 Mulching & Side Discharge, 144cc 4-Stroke OHV Engine, 6-Position Height Adjustment, Lightweight Push Mower for Small to Medium Yards Review

Overview

The AMERISUN 21 Inch Gas Push Lawn Mower is a budget-friendly workhorse designed for homeowners with small to medium-sized yards—typically those under a quarter acre. It packs a 144cc 4-stroke OHV engine into a lightweight frame, offering mulching and side discharge capabilities without the complexity or cost of self-propelled models. If you’re looking for an affordable gas mower that doesn’t sacrifice basic performance for price, this is a solid contender.

Who Should Buy This

Homeowners with small suburban yards (up to 1/4 acre). This mower’s 21-inch cutting deck and 144cc engine are ideal for modest lawns where a larger self-propelled mower would be overkill and a corded electric mower would tether you to an outlet.

First-time gas mower buyers on a tight budget. At $229.99, it’s one of the cheapest new gas mowers you’ll find. It’s a great entry point for anyone who wants gas power without a $400+ investment.

Homeowners who prefer simplicity over bells and whistles. No self-propel, no electric start, no fancy deck coatings—just a pull-start engine and a lever to adjust height. If you want a no-nonsense tool that just mows, this is for you.

Mulch fans who don’t bag clippings. The 2-in-1 design favors mulching (with a plug included) and side discharge. If you rarely bag and want nutrient-rich clippings returned to your lawn, this mower handles that well.

Key Features Breakdown

144cc 4-Stroke OHV Engine: This is a reliable, low-maintenance powerplant. It starts consistently (after a few pulls when cold) and provides enough torque to handle typical grass up to 4–5 inches tall. Don’t expect it to power through thick, wet, or overgrown fields—it’s for regular weekly mowing, not bushwhacking.

21-Inch Steel Cutting Deck: A standard width for this class, it balances maneuverability with coverage. The steel deck is durable but prone to rust if you don’t clean it after wet cuts. Not a problem for most, but worth noting if you’re in a humid climate.

2-in-1 Mulching & Side Discharge: Comes with a mulching plug that directs clippings back into the lawn. Switching to side discharge is a tool-free process—just remove the plug and attach the included chute. No rear bagging option here, so if you need to collect clippings, you’ll need an aftermarket bagger or skip this model.

6-Position Height Adjustment: A single lever on each wheel adjusts cutting height from roughly 1 to 3 inches in half-inch increments. It’s a manual process (you move each wheel individually), but it’s reliable and gives you fine control over cut length. Ideal for transitioning from spring to summer grass heights.

Lightweight Design: At around 55 pounds, this is one of the lightest gas push mowers available. That makes it easy to push on flat lawns, maneuver around flower beds, and lift into a truck or shed. For older users or anyone with limited strength, this is a huge plus.

No Self-Propel: You push it yourself. On flat, small lawns that’s fine, but on any incline over 10 degrees or with thick grass, you’ll feel the effort. Know your terrain before buying.

Pros

1. Great value for the price. At $229, you’re getting a new gas mower with a reliable engine and steel deck—hard to beat in this price range.

2. Lightweight and easy to maneuver. At 55 pounds, it’s one of the easiest gas mowers to push and lift. Great for small yards with tight corners.

3. Tool-free height adjustment. Each wheel has a simple lever—no wrenches, no pins. You can change cut height in seconds.

4. Consistent starting (when warm). Once the engine is warm, it fires on the first or second pull. Cold starts take a few more pulls, but it’s not a fight.

5. Effective mulching. With the plug in, it chops clippings finely enough to disappear into the lawn. No clumping on dry grass.

6. Easy oil change. The engine has a convenient drain plug, making oil changes less messy than some competitors that require tipping the mower.

Cons

1. No rear bagging option out of the box. If you need to collect clippings for composting or to avoid leaving clumps, you’ll have to buy an aftermarket bagger or use side discharge (which leaves a windrow).

2. Cold start can be finicky. Several users report needing 5–10 pulls on a cold engine, especially when new. It’s not a dealbreaker, but it’s not as easy as a Honda or Toro.

3. Steel deck prone to rust. If you mow wet grass and don’t clean the underside, you’ll see rust within a season. A quick hose-down after each use solves this, but it’s an extra step.

4. No self-propel on hills. If your yard has even a moderate slope, you’ll be pushing hard. This mower is best on flat or gently rolling terrain.

Bottom Line

The AMERISUN 21 Inch Gas Push Lawn Mower is a smart, budget-conscious choice for homeowners with small, flat yards who want reliable gas power without spending a fortune. It’s not a premium mower—you won’t get self-propel, electric start, or a rust-proof deck—but it delivers solid cut quality, easy height adjustment, and a lightweight design that’s a joy to push. If your lawn is under a quarter acre and you’re okay with mulching or side discharge (no bagging), this mower will serve you well for several seasons. For anyone on a tight budget or buying their first gas mower, it’s a clear recommendation.

Frequently Asked Questions

Q: Does this mower come with a bag for collecting grass clippings?
A: No, it does not include a rear bag. It’s a 2-in-1 mower with mulching and side discharge only. If you need a bag, you’ll need to purchase a compatible aftermarket bagger separately.

Q: How often should I change the oil, and what type does it use?
A: Change the oil after the first 5 hours of use, then every 25–30 hours or once per season. It uses SAE 30 or 10W-30 oil (about 15 oz). The engine has a convenient drain plug for easy changes.

Q: Can this mower handle tall, thick grass?
A: It’s best for regular weekly mowing on grass up to 4–5 inches tall. If you let the lawn get overgrown (6+ inches), the 144