Skip to content

MechMaxx 429cc KOHLER E-Start Stump Grinder with Tow Bar

Save $300.00
Original Price $2,899.00
Current Price $2,599.00

Notify me when back in stock

Description

Remove tough stumps fast with the SG380 15" stump grinder featuring a 14HP 429cc KOHLER electric‑start engine, 12 replaceable carbide teeth, and a centrifugal clutch with dual drive belts for smooth, reliable power transfer. Built for landowners, landscapers, and property managers, it delivers strong cutting performance, easy belt adjustment, and tow‑bar mobility for efficient stump removal across any property

Shipping & Returns

Free Shipping on MOST USA‑wide. No extra charges.

30‑day Easy Returns. Not happy with your product? We'll take it back, no questions asked.

Why Buy From Us

We’re dedicated to providing the best heavy‑duty equipment built for real‑world jobs.

We partner only with reputable brands to deliver reliable, contractor‑grade tools backed by integrity and service you can trust.

When you buy from UnionBuilt Supply, you’re investing in quality gear and a company committed to supporting the trades and the communities they serve.
A portion of every sale helps fund local trade programs and community rebuilding efforts and more.

Found a better price? We’ll match it with our Price Match Guarantee!


Question? We'd love to have a chat!
Email: Support@unionbuiltsupply.com
Phone: (833) 982-7877

MechMaxx 429cc KOHLER E‑Start Stump Grinder with Tow Bar

Remove stumps efficiently with this KOHLER‑powered stump grinder designed for residential and small‑property maintenance. The 429cc electric‑start engine drives a carbide‑tooth cutting wheel that supports controlled grinding across the stump surface. A reinforced frame helps maintain stability during operation, while the tow‑bar design allows the grinder to be transported easily between work areas.

The compact structure makes it suitable for locations where larger equipment cannot maneuver. Its layout supports predictable handling for property owners and contractors needing a standalone stump‑reduction tool.

Product manual (PDF)

Download PDF

Engine manual (PDF)

Download PDF
Cutter Wheel and Teeth
Cutter Wheel and Teeth

Mounted on the 10-inch diameter cutter wheel are 12 sets of professional-grade teeth, enabling a cutting diameter of an impressive 14 inches . This allows for cutting stumps at a higher elevation from the ground. The pocket is forged from 42CrMo, and teeth are made of YG11C alloy, with a diameter of 1 inch. This design ensures more efficient stump cutting, improving work efficiency by approximately 35% compared to other types of teeth.

KOHLER® Command PRO®
KOHLER® Command PRO®

This is what it takes to be a PRO. Performance-driven features like a heavy-duty air cleaner, forged-steel crankshaft, electronic ignition and cast-iron cylinder liner. KOHLER® Command PRO® is the standard for professional-grade power and performance.

• Quad-Clean™ all-season four-stage cyclonic air filter - effective engine protection for tough-and-dirty conditions

• Large-capacity fuel tank means more time working, less time filling

• Power or repower your equipment without expensive modifications

• 3-year commercial limited warranty

Electric Start and Battery: Kohler
Electric Start and Battery: Kohler

The ignition key has been moved to the control panel, accompanied by a safety pressure lever. Pressing down on the safety pressure lever will start the engine. A 12V20Ah lead-acid battery is installed at the bottom of the handle, shifting the center of gravity towards the rear of the entire machine. This configuration helps conserve energy while the machine is in operation.

Chassis Rotation
Chassis Rotation

The design concept is to integrate the engine, cutter wheel, and handle into a single welded structure as a working unit. There is a set of rotating mechanisms between the working unit and the chassis. The lever on the right side of the handle can lock and release the chassis. When in a ready-to-work state, lifting the left brake handle can simultaneously lock both left and right tires. After releasing the chassis, the unit can swing left and right to perform cutting tasks. This design allows operators to work more easily and continuously.

Left and Right Swing Rotation Angle
Left and Right Swing Rotation Angle

The chassis's left and right swing angle can reach 65 degrees, with a linear distance of up to 31.5 inches. This allows for easy cutting of stumps with a diameter of up to 31.5 inches, relying solely on the simple swinging of the chassis.

Tyre Fixation
Tyre Fixation

In our latest design, both tyres are fixed simultaneously, and the chassis swings left and right to perform tasks. The major advantage of this design is the ability to work more easily and continuously. Fixing both tyres at the same time ensures protection against collision injuries caused by operator errors, greatly improving operational safety.

Cutting Height and Depth
Cutting Height and Depth

With a maximum cutter wheel rotation diameter of 14 inches and a dual-wheel locking design, the handle can easily be pressed down, achieving a cutting height of 15 inches above the ground and a depth of 10 inches.

Adjustable Rotation Handle
Adjustable Rotation Handle

This lever controls the locking and releasing of the chassis. When the chassis needs to rotate during work, lift the lever. To move the machine to the next work area, return the lever to its original position, and simultaneously release the tire brake handle to enable movement.

Tow Bar and Support Leg
Tow Bar and Support Leg

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 stump grinder to work area. The trailer hitch comes as a standard feature which can be installed when needed. You can lower the support legs to prevent the cutting head from hitting the ground when not in operation.

  • Demonstration
  • Assembly & Installation
Product Warranty

MechMaxx 429cc KOHLER E-Start Stump Grinder with Tow Bar (SKU: 130400) 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 KOHLER CH440 Cutting Height 15 in Above Ground
Certification(S) EPA Phase III, CARB Phase III Cutting Depth 10 in Below Ground
Engine Type Single Cylinder, 4 Stroke, Air-Cooled, OHV Rotary Chassis Yes
Displacement/ HP 429 cc; 14 HP Max. Rotation Angle 65 Degrees
Start E-Start Max. Rotating Distance 31.5 in
Battery 12 V 20 Ah Lead-Acid Tow Bar Included
Brake 2 x Wheel Lock Coupler 2 in Ball
Belt 2 x V-Belts Wheelbase 32 in
Belts Material Kevlar Max. Speed Off-Road Only and Max. Speed 15mph
Clutch Centrifugal Clutch Front Wheel 10 in
Cutting Wheel Dia. 14 in Tire 145 / 70-6 Tubeless Tyre
Cutting Wheel Thickness 0.47 in Assembled Weight 303 lbs
Carbide Tip Qty. 12 Pcs Gross Weight 353 lbs
Tip Holder Material 42CrMo Packing Size  45 x 30 x 29.5 in
Carbid Tip Material YG11C Alloy

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.