Kubota Z421

Kubota Z421The 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
ModelKubota Z421 KW/KWT
Length2,055 mm (80.9 in)
Width Z421KW: 1,235 mm (48.6 in)
Z421KWT: 1,376 mm (54.2 in)
Height1,770 mm (69.7 in)
Wheel base1,255 mm (49.4 in)
Weight Z421KW: 395 kg (870 lbs)
Z421KWT: 410 kg (904 lbs)
Fuel tank capacity25.7 liters (6.8 US gal.; 5.7 Imp. gal)
Battery12V, CCA: 300A
Cabin typeTwo-post folding ROPS
Engine
Engine modelKawasaki FS730V
Engine typeFour-stroke, air-cooled, V
Cylinders2
Fuel typeGasoline
Displacement0.7 L, 726 cm2, (44.3 cu·in)
Bore and stroke78.0 mm X 76.0 mm (3.07 in X 2.99 in)
Horsepower24.3 PS (17.9 kW; 24.0 HP) at 3,600 rpm
StarterElectric
Oil capacity:2.1 L (2.2 US. qt, 1.8 Imp. qt.)
Spark plugNGK BPR4ES
Transmission and chassis
Chassis4×2 2WD
Steering typePower
Brakes–
Transmission modelHydro-Gear ZT3400
Transmission typeHydrostatic
GearsInfinite forward and reverse
Speed Forward: 16.0 kmh (9.9 mph) Reverse: 8.0 (5 mph)
Transmission oil capacity4.8 L (1.3 US. gal, 1.1 Imp. gal.)
Tires
Front tiresLawn/turf:
Z421KW: 13×5.0-6
Z421KWT: 13×6.5-6
Rear tiresLawn/turf:
Z421KW: 24×9.5-14
Z421KWT: 24×12-14
PTO (Power take-off shaft)
PTO typeBelt driven with electric cluth type
Front PTO speed–
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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. In addition, the characteristics may vary depending on the modification and market. We do not provide advice on technical issues related to the any operation or repair. We do not recommend using provided information for repairing or spare parts ordering, use only official service manuals and spare-parts catalogs.

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