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 modelKawasaki FS730V
Engine typeFour-stroke, air-cooled, V
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
Oil capacity:2.1 L (2.2 US. qt, 1.8 Imp. qt.)
Spark plugNGK BPR4ES
Transmission and chassis
Chassis4×2 2WD
Steering typePower
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.)
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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