MechMaxx SG380 Kohler Stump Grinder
#3 in Walk-behindFull review
The SG380 for a buyer who values a name-brand engine and local service. Otherwise the Ducar version does the same work for less.
Amazon $2,699$2,699
The MechMaxx SG380 Kohler Stump Grinder is the better stump grinder overall, rated 4.1 to 3.7. The MechMaxx SG380 Kohler Stump Grinder leads on features, teeth and depth. The Bilt Hard 420cc Stump Grinder wins on price and height or wheel. The Bilt Hard 420cc Stump Grinder costs $1,299.01 less ($1,399.99 vs $2,699).
Bilt Hard 420cc Stump Grinder
#8 in Walk-behindFull review
A low-cost 420cc grinder for a homeowner with a handful of stumps. It gives big-engine power without the price of the better-equipped models.
Amazon $1,399.99$1,399.99
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.
Which should you buy?
- Choose the MechMaxx SG380 Kohler Stump Grinder for features (electric start, tow bar, swings across the stump vs none of the three), teeth (12 teeth vs 9 teeth) and depth (10 in below grade vs 9.3 in below grade).
- Choose the Bilt Hard 420cc Stump Grinder for price ($1,399.99 vs $2,699) and height or wheel (24 in above grade vs 15 in above grade).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every walk-behind stump grinder; a clear win is highlighted. How we rank explains each one.
| Factor weight | MechMaxx SG380 Kohler Stump Grinder | Bilt Hard 420cc Stump Grinder |
|---|---|---|
| Overall rating | 4.1/5 | 3.7/5 |
| Price 25% | 41 $2,699 | 84 $1,399.99 |
| Depth 20% | 80 10 in below grade | 66 9.3 in below grade |
| Height or wheel 10% | 88 15 in above grade | 100 24 in above grade |
| Power 10% | 100 429 cc engine | 96 420 cc engine |
| Teeth 10% | 100 12 teeth | 62 9 teeth |
| Features 15% | 100 electric start, tow bar, swings across the stump | 0 none of the three |
| Warranty 10% | 33 1-year warranty | 33 1-year warranty |
Specifications
| MechMaxx SG380 Kohler Stump Grinder | Bilt Hard 420cc Stump Grinder | |
|---|---|---|
| Cutting | ||
| Type | Walk-behind | Walk-behind |
| Depth below grade | 10 in | 9.3 in |
| Height above grade | 15 in | 24 in |
| Cutter wheel | 14 in | - |
| Teeth | 12 | 9 |
| Power | ||
| Engine | Kohler CH440 | 420cc 4-stroke |
| Displacement | 429 cc | 420 cc |
| Engine power | 14 hp | 15 hp |
| Electric start | Yes | No |
| Build | ||
| Swings across stump | Yes | - |
| Tow bar | Yes | No |
| Weight | 303 lb | - |
| Warranty | 1 year | 1 year |