The Kubota Z421 KW/KWT is a 2WD zero-turn mower from the Z400 series. This tractor has been manufactured by Kubota since 2017. The Kubota Z421 is equipped with a 0.7 L two-cylinder gasoline engine and hydrostatic transmission with infinite forward and reverse gears.
The Kubota Z421 zero-turn mower used the Kawasaki FS730V engine. It is a 0.7 L, 726 cm2, (44.3 cu·in) V-twin natural aspirated gasoline engine with 78.0 mm (3.07 in) of the cylinder bore and 76.0 mm (2.99 in) of the piston stroke. This engine produced 24.3 PS (17.9 kW; 24.0 HP) at 3,600 rpm of maximum output power.
The Kubota Z421 is equipped with power steering,two-post folding ROPS and 25.7 liters (6.8 US gal.; 5.7 Imp. gal) fuel tank.
Following attachments are available for the Kubota Z421 zero-turn mower:
- Z421KW: mid-mount Kubota RCK54-400Z – 54 in (1,370 mm) mower deck
- Z421KWT: mid-mount Kubota RCK60-400Z – 60 in (1,520 mm) mower deck
Kubota Z421 KW/KWT Specifications
| General Specifications | |
| Model | Kubota Z421 KW/KWT |
| Length | 2,055 mm (80.9 in) |
| Width |
Z421KW: 1,235 mm (48.6 in) Z421KWT: 1,376 mm (54.2 in) |
| Height | 1,770 mm (69.7 in) |
| Wheel base | 1,255 mm (49.4 in) |
| Weight |
Z421KW: 395 kg (870 lbs) Z421KWT: 410 kg (904 lbs) |
| Fuel tank capacity | 25.7 liters (6.8 US gal.; 5.7 Imp. gal) |
| Battery | 12V, CCA: 300A |
| Cabin type | Two-post folding ROPS |
| Engine | |
| Engine model | Kawasaki FS730V |
| Engine type | Four-stroke, air-cooled, V |
| Cylinders | 2 |
| Fuel type | Gasoline |
| Displacement | 0.7 L, 726 cm2, (44.3 cu·in) |
| Bore and stroke | 78.0 mm X 76.0 mm (3.07 in X 2.99 in) |
| Horsepower | 24.3 PS (17.9 kW; 24.0 HP) at 3,600 rpm |
| Starter | Electric |
| Oil capacity: | 2.1 L (2.2 US. qt, 1.8 Imp. qt.) |
| Spark plug | NGK BPR4ES |
| Transmission and chassis | |
| Chassis | 4×2 2WD |
| Steering type | Power |
| Brakes | – |
| Transmission model | Hydro-Gear ZT3400 |
| Transmission type | Hydrostatic |
| Gears | Infinite forward and reverse |
| Speed | Forward: 16.0 kmh (9.9 mph) Reverse: 8.0 (5 mph) |
| Transmission oil capacity | 4.8 L (1.3 US. gal, 1.1 Imp. gal.) |
| Tires | |
| Front tires | Lawn/turf: Z421KW: 13×5.0-6 Z421KWT: 13×6.5-6 |
| Rear tires | Lawn/turf: Z421KW: 24×9.5-14 Z421KWT: 24×12-14 |
| PTO (Power take-off shaft) | |
| PTO type | Belt driven with electric cluth type |
| Front PTO speed | – |