Kubota F3990 vs Wheel Horse SB-421
Side-by-side specs comparison
Verdict by the numbers
- The Kubota F3990 is more powerful than the Wheel Horse SB-421: 39 HP versus 11 HP (+28 HP, +255%).
- The Kubota F3990 is the more recent model: production started in 2014, versus 1982 for the Wheel Horse SB-421.
- The Kubota F3990 has the wider mower deck: 60" versus 42".
Full specs comparison
| Kubota F3990 | Wheel Horse SB-421 | |
|---|---|---|
| Power | 39 HP | 11 HP |
| Production years | 2014–2024 | 1982 |
| Fuel | Diesel | Gasoline |
| Cylinders | 4 | 1 |
| Weight | 778 kg | — |
| Drive | 4WD | 2WD |
| Transmission | Hydrostatic | Gear |
| Gears (fwd/rev) | — | 6 / 2 |
| Wheelbase | 130 cm | — |
| Length | 251 cm | — |
| Mower deck | 60" | 42" |