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Black tow-behind rough cut mower with gasoline engine, hitch, orange control levers, and two wheels

MechMaxx ATV120 48" Tow-Behind ATV Offset Flail Mower - 13.5HP 420cc B&S Electric-Start Engine

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$3,799.00
$3,399.00
Model : ATV120; B&S In Stock
ATV120; B&S ATV140; ZONSEN

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Description

Clear large areas of grass and vegetation with a 48" offset flail mower built for ATVs and UTVs. Designed for landowners and contractors who need reliable cutting power and adjustable mowing height.
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UnionBuilt Supply is an authorized dealer of MechMaxx. All manufacturer warranties are honored.

MechMaxx ATV120 – 48" Tow‑Behind Offset Flail Mower

Maintaining medium‑to‑large properties requires a mower that can reach tight areas while covering ground efficiently. This tow‑behind flail mower solves that need with reliable cutting power and offset mowing behind an ATV or UTV.

  • Reliable Engine: 13.5HP 420cc Briggs & Stratton electric‑start engine.
  • 48" Cutting Width: Efficient coverage with 5‑point offset for edge mowing.
  • Adjustable Cutting Height: Handle‑controlled for precise results.
  • Stable Build: Two 16‑inch all‑terrain tires for traction and stability.
  • Clean Mulching: Rear discharge produces uniform mulch.
  • Use Case Note: Handles grass up to 4 inches; not for heavy overgrowth.

Product manual (PDF)

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Engine manual (PDF)

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Engine
Engine

This ATV mower is equipped with a 13.5HP 420cc B&S XR2100 engine, which has excellent performance, reliable quality, and can be used for a long time.

Adjustable Cutting Height
Adjustable Cutting Height

The handle can adjust the cutting height to meet the various needs of users.

5-Point Offset Capabilities
5-Point Offset Capabilities

48'' working width with 5-point offset for fast and precise mowing of large areas around buildings.

16-Inch All-Terrain Rubber Tires
16-Inch All-Terrain Rubber Tires

Backed by two 16-inch all-terrain rubber tires, it can tackle tough work wherever you are, and it has an included stand for better storage.

Adjustable Height Roller Bar
Adjustable Height Roller Bar

Adjustable Height Roller Bar adjusts to raise or lower the cutting height to your desired need.

Tow Bar
Tow Bar

A 2-inch coupler is mounted on the tow bar, compatible with a 2 inch trailer ball. When outdoor work is needed, you can use the ATV or pickup truck to tow the mower to work area.

  • Demonstration
  • Highlights
  • Assembly & Installation
Product Warranty

MechMaxx ATV120 48" Tow-Behind ATV Offset Flail Mower - 13.5HP 420cc B&S Electric-Start Engine (SKU: 150133) includes a standard one-year manufacturer warranty covering defects in materials and workmanship under normal use.

Product Extended Warranty Plans

Extended warranty plans may be available for select products. Contact us to confirm eligibility and coverage details.

Engine Briggs & Stratton XR2100  420cc/13.5hp Electric Start Gasoline Engine
Working Width 48 in
Overall Width 77 in
Cutting Height 0.4-2.5 in
Number of Blades 28
Blade Type Hammers
Size of Blades 4x2.6 in
Blade Weight 0.8 lbs
Blade Material Cast Steel
Rotor Bearing SKF Bearing
Rotor Rotation Reverse
Drive Type Belt Drive
Number of Belts 3
Belt Size 0.7x40 in(17X1016)
Tire Size 16 in
Finish Powder Coat Paint Galvanized Steel
Warranty 1 Year
Net Weight/Gross Weight 609lbs/675lbs

WARNlNG: This product can expose you to chemicals including engine exhaust (including diesel engine exhaust when equipped),lead and lead compounds, mineral oils, soots, phthalates, and carbon monoxide which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Certain specification(s) are based on engineering calculations and are not actual measurements. Specification(s) are provided for comparison purposes only and are subject to change without notice. Specification(s)  for your individual equipment will vary based on normal variations in design, manufacturing, operating conditions, and other factors.

 

  • 5 stars: 23 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
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Jerome M

As described. Works great on my tractors. Well built and everything arrived on time.

Jerome M review photo Jerome M review photo
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Daniel L

Like it so far. Does a good job. Love to have it run longer on a tank of fuel.

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Chad J

Fantastic machine. This mower is powerful and does a great job mowing our brush and tall grass. We have a lot of debris in spots and the flails do a great job with it. Great customer service as well during the delivery and setup process. Definitely would recommend.

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Scott H

Just got done mowing a 4 acre field that had weeds, grasses and small trees up to 8 ft tall. I am very impressed with this mower. The only thing I would change is make it so the front of the skids couldn't collect grass.

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John C

MechMaxx 48" Tow-Behind ATV Offset Flail Mower, 15HP 420cc E-start Gas Engine Powered; Adjustable Mowing Height

M
Matthew L

Purchased the UTV offset flail mower. It arrived in time with great tracking. Well packaged and no damage. All parts were present. I was able to get it assembled and running in an hour approximately. Height easily adjusts. Cut is outstanding. I used it on long grass in field and trail trimming!! Very happy with purchase!!

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Thomas R

This ATV offset flail mower cuts through thick grass and brush like a pro, saving me tons of time. Hammers are durable and capable of handling small branches and thick weeds without frequent replacement.

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Shon N

Construction is solid, with heavy-duty materials that show minimal wear even after extensive use on rough ground.

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Billy A

A must-have for any property owner. It’s rugged, reliable, and cuts evenly. Perfect for thick underbrush or just cleaning up a field. Great value for the quality.

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Jerry R

Strong motor and sharp flails make mowing quick and effective. Easily handles uneven ground. It’s built to last, and maintenance is simple. Definitely a great piece of equipment.

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Timmy S

Handles dense vegetation with no problem. Quiet operation and no flying debris like with a rotary. Leaves the field tidy. Good investment for long-term land care.

D
Darrell H

Very pleased with this flail mower. Cuts beautifully and tackles rough areas with ease. Build quality is top notch. I use it weekly and it’s still going strong!

N
Noah

Surprisingly powerful for its size. I’ve cleared acres of overgrowth effortlessly. Love the clean cut it leaves behind. Low vibration, very stable. Ideal for fields, orchards, and ditches.

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Keith T

Cuts clean, even in thick, tangled growth. I'm impressed by how well it mulches. Durable build, smooth operation. Couldn't ask for more!

R
Randy M

ATV120 has super sharp blades, can tames overgrown areas quickly. Great for tight spaces! Also tough on brush, and reliable in wet conditions. Assembly was easy. Maneuvers well around trees.

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Jay

Strong motor. Cuts clean and fast. Simple controls. Very stable. Perfect for food plots. Compact yet powerful. Works great behind my quad. Impressed with durability. Cuts better than rotary. Love this mower!

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Erick J

Starts up strong and runs great. Perfect for clearing overgrown paths. Blades stay sharp and cut clean. Impressive cutting width saves time. Easy height adjustment. Sturdy design, no rattling parts. Handles slopes with ease. Low maintenance needed. Cuts saplings and brush smoothly. Quiet for its power. Saves hours of work. Great customer service. Quick shipping.

J
Jeff W

This wood chipper is Easy to set up, shipped quickly and works perfectly for my rental business

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Jack S

I ordered the 48” mower and it arrived within two weeks. I am turning 63 next month and have no problems using the mower. I mowed about 2 acres of grass and weeds and it handled it without a glitch.

A
Ava T

Assembly was straightforward with clear instructions provided. Took me about an hour, and everything fit perfectly. Even if you're not super handy, it's easy enough to set up.

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Olivia C

The customer service was fantastic! They answered all my pre-purchase questions promptly and even helped me track my shipment after ordering. Very professional and supportive.

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Gabriel?N

I'm maintaining a lawn or clearing dense vegetation, this guy has been doing a very job.

H
Henry N

The adjustable mowing height allows me to adapt to various conditions and achieve a professional-looking finish.

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