Dosko 620-20HE Walk-Behind Stump Grinder | 20 HP Honda GX630, Electric Start

SKU: 620-20HE
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Full Warranty Included
Made in USA
$ 7845 00
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Product Description

The Dosko 620-20HE puts serious 20 HP power in a walk-behind frame, so you get commercial grinding force without the cost or bulk of a self-propelled machine. It is the grinder for the operator who wants to drop big stumps fast and keep the setup simple.

A Honda GX630 electric-start engine, 688cc, drives a 14-inch cutter wheel through a 4-groove belt system, taking stumps 20 inches above grade and 16 inches below. The Greenteeth 700 Series teeth rotate to a fresh edge in minutes, so a full day of stumps never wears down your pace.

This grinder earns its place on a job site or a rental lot. Renting a 20 HP grinder runs well over a hundred dollars a day, and the pro crews charge by the stump. Own this one and a couple of jobs cover it, then it keeps making money load after load.

Turn the key, set the 5-position handlebar where you want it, and grind. The oil-alert shutdown protects the engine, and the heavy frame soaks up the vibration of back-to-back stumps without flexing.

Ideal For: Tree crews, landscapers, rental fleets, and large-acreage owners who want 20 HP grinding power in a straightforward walk-behind machine.

Key Features

20 HP Honda GX630 Engine: Big commercial electric-start power for fast, aggressive grinding through large stumps

14-Inch Cutter Wheel: Grinds 20 inches above grade and 16 inches below for complete stump removal

Greenteeth 700 Series Teeth: Eight teeth rotate in 120-degree increments for a fresh cutting edge in minutes

4-Groove Belt Drive: Power band with idler-bearing tensioners puts the full 20 HP into the wheel

Walk-Behind Simplicity: Commercial power without the cost or bulk of a self-propelled machine

Oil-Alert Shutdown: Protects the engine from low oil for fewer breakdowns on the job

All-Terrain Tires with Brake Band: 4.80/4.00-8 tires roll over rough ground and lock in place while you work

5-Position Adjustable Handlebar: Set a comfortable working height for long grinding days

Electric Start: Turn-key starting, job after job

Technical Specifications

Model / SKU 620-20HE
Engine Honda GX630
Displacement 688cc
Horsepower 20 HP
Fuel Type Gasoline
Operating RPM 2500
Starter Electric
Drive Direct belt drive (4-groove power band, idler-bearing tensioners)
Cutter Wheel 14 in. diameter x 3/8 in. thick
Cutting Capacity Above Grade 20 in.
Cutting Capacity Below Grade 16 in.
Cutter Teeth Greenteeth 700 Series (8 teeth, rotatable)
Bearings 1.375 in.
Tires 4.80/4.00-8 in. with adjustable brake band
Low-Oil Shutdown Yes
Dry Weight 400 lbs.
Handlebar 5-position adjustable
Optional Tow bar package

What's Included

▪ Dosko 620-20HE Walk-Behind Stump Grinder ▪ Greenteeth 700 Series teeth (installed) ▪ Owner's Manual

Run it on removal jobs, rent it out, or clear your own land. The 620 pays for itself in a couple of jobs, so add to cart and get grinding.

Warranty

This stump grinder is covered by a 1-year limited warranty through Dosko against defects in materials and workmanship under normal use. The Honda engine is covered separately under Honda's own engine warranty and serviced through the Honda dealer network.

Manuals & Downloads

Product Manual

Q&A

Q: How does the 620 differ from the self-propelled 691SP?
A: Both run the same 20 HP Honda GX630. The 620 is a walk-behind you push and position by hand, while the 691SP drives itself with a hydrostatic system. The 620 costs less and is the better pick when you do not need self-propel.

Q: How big a stump can it grind?
A: The 14-inch cutter wheel grinds 20 inches above grade and 16 inches below, enough for most residential and commercial stumps.

Q: Does it include a battery?
A: No. Electric-start units ship without a battery due to shipping and battery-safety rules. A standard battery from any auto parts store installs in minutes.

Q: What engine does it use and who services it?
A: A 20 HP Honda GX630 commercial engine, serviced through Honda's nationwide dealer network with easy-to-find parts.

Q: How are the cutter teeth maintained?
A: Greenteeth 700 Series teeth, eight total, rotate in 120-degree increments for a fresh edge in minutes instead of replacing teeth.

Q: Can one person move and operate it?
A: Yes. At 400 pounds on all-terrain tires with a brake band, one person can position and run it. An optional tow bar package is available for moving it longer distances.