Dosko 691SP-20HE Self-Propelled Stump Grinder | 20 HP Honda GX630, Hydrostatic Drive, Electric Start
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Product Description
When stumps are the job and not just a chore, you need a grinder that pulls its own weight. The Dosko 691SP-20HE is self-propelled, so its hydrostatic drive moves the machine to the stump and around the site under its own power. You guide it, the machine does the hauling, and a 500-pound grinder suddenly handles like a push mower.
A 20 HP Honda GX630 electric-start engine spins a 14-inch cutter wheel hard enough to take stumps 24 inches above grade and 18 inches below. The 4-groove belt drive puts every bit of that power into the wheel, and the Greenteeth 700 Series teeth rotate to a fresh edge in minutes, so an all-day removal route never slows you down.
This is a machine built to earn. Rental yards keep it on the lot, tree crews run it stump to stump, and property pros bill by the job. A 20 HP grinder rents for well over a hundred dollars a day, so a few jobs cover the unit and the rest is margin. The front-mounted cutter wheel keeps the cutting action out front for better control and sight lines on every pass.
Turn the key and go. The hydrostatic drive makes loading, unloading, and repositioning effortless, and the 5-position handlebar sets a working height that keeps you comfortable through a long day on the controls.
Ideal For: Rental fleets, tree services, landscapers, and commercial property crews who grind stumps all day and need a self-propelled machine that moves itself and pays for itself fast.
Key Features
▪ 20 HP Honda GX630 Engine: Commercial electric-start power with the service network to back it, built for all-day grinding
▪ Hydrostatic Self-Propelled Drive: Moves the 500-pound machine to the stump and around the site under its own power for easy maneuvering and loading
▪ 14-Inch Cutter Wheel: Grinds 24 inches above grade and 18 inches below for deep, complete stump removal
▪ Greenteeth 700 Series Teeth: Eight teeth rotate in 120-degree increments for a fresh cutting edge in minutes, no tooth changes mid-job
▪ 4-Groove Belt Drive: Power band with idler-bearing tensioners delivers the full engine output to the wheel
▪ Front-Mounted Cutter Wheel: Keeps the cutting action and sight lines out front for better control on every pass
▪ Heavy-Duty Tires with Brake Band: 16 x 6.50-8 tires roll over rough ground and lock in place while you grind
▪ 5-Position Adjustable Handlebar: Dial in a comfortable height for long days on the controls
▪ Electric Start: Turn-key starting for fast, repeatable starts job after job
Technical Specifications
| Model / SKU | 691SP-20HE |
| Engine | Honda GX630 |
| Displacement | 688cc |
| Horsepower | 20 HP |
| Fuel Type | Gasoline |
| Operating RPM | 3000 |
| Starter | Electric |
| Drive | Direct belt drive (4-groove power band, idler-bearing tensioners) |
| Propulsion | Hydrostatic self-propelled |
| Cutter Wheel | 14 in. diameter x 3/8 in. thick |
| Cutting Capacity Above Grade | 24 in. |
| Cutting Capacity Below Grade | 18 in. |
| Cutter Teeth | Greenteeth 700 Series (8 teeth, rotatable) |
| Bearings | 1.375 in. |
| Tires | 16 in. x 6.50-8 in. with adjustable brake band |
| Dry Weight | 500 lbs. |
| Handlebar | 5-position adjustable |
What's Included
▪ Dosko 691SP-20HE Self-Propelled Stump Grinder ▪ Greenteeth 700 Series teeth (installed) ▪ Owner's Manual
Add it to your rental fleet, run it stump to stump on removal jobs, or clear your own acreage. The 691SP pays for itself in a handful of jobs, so add to cart and put it to work.