DK2 OPG777 Stump Grinder
#7 in Walk-behindFull review
For a buyer who wants a known engine and the longest machine warranty in this price range. Depth is average.
Amazon $1,799$1,799
The DK2 OPG777 Stump Grinder rates 3.8 among walk-behind stump grinders; the MechMaxx SG28 PTO Stump Grinder rates 3.8 among PTO ones. The DK2 OPG777 Stump Grinder costs $700 less ($1,799 vs $2,499).
MechMaxx SG28 PTO Stump Grinder
#2 in PTOFull review
For a utility tractor owner clearing many stumps. It cuts deeper and wider than the 24 in models.
Amazon $2,499$2,499
Prices were last checked November 3, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different type classes (walk-behind and PTO), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | DK2 OPG777 Stump Grinder | MechMaxx SG28 PTO Stump Grinder |
|---|---|---|
| Overall rating | 3.8/5 | 3.8/5 |
| Price 25% | 68 $1,799 | 54 $2,499 |
| Depth 20% | 60 9 in below grade | 79 8.5 in below grade |
| Height or wheel 10% | 50 12 in above grade | 80 28 in cutter wheel |
| Power 10% | 100 429 cc engine | 71 tractors up to 80 hp |
| Teeth 10% | 62 9 teeth | 100 44 teeth |
| Features 15% | 35 tow bar | 50 slip clutch |
| Warranty 10% | 100 3-year warranty | 33 1-year warranty |
Specifications
| DK2 OPG777 Stump Grinder | MechMaxx SG28 PTO Stump Grinder | |
|---|---|---|
| Cutting | ||
| Type | Walk-behind | PTO, 3-point hitch |
| Depth below grade | 9 in | 8.5 in |
| Height above grade | 12 in | - |
| Cutter wheel | 12 in | 28 in |
| Teeth | 9 | 44 |
| Power | ||
| Engine | Kohler Command PRO CH440 | - |
| Displacement | 429 cc | - |
| Engine power | 14 hp | - |
| Electric start | No | - |
| Tractor | - | 35 to 80 hp |
| Hitch category | - | 1 |
| Slip clutch | - | Yes |
| Build | ||
| Tow bar | Yes | - |
| Weight | 231 lb | 618 lb |
| Warranty | 3 years | 1 year |