Kubota lawn tractors

Kubota Z121S

The Kubota Z121S is a zero-turn mower in the Z100 Series produced from 2014 onward. It features a 21 hp Kohler Courage Professional 747cc 2-cylinder gasoline engine with a hydrostatic Hydro-Gear ZT3100 transmission offering infinite forward and reverse speeds. The mower has a two-wheel drive with differential power steering and a two-post fixed ROPS with suspended seat. It includes a 48" mid-mount mower deck and an independent mid PTO with an electric dry disc clutch. Dimensions include a 45.5 inch wheelbase, 76.4 inch length, and 47.5 inch width, weighing 749 lbs. The mower uses 11x4-5 front tires and 22x10-14 rear tires. Electrical system is 12 volts with a 300 CCA battery and 15 amp charging.

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ModelZ121S

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Technical Specifications

Detailed specifications and technical data for Kubota Z121S

Tires

Rear tire	22x10-14
Front tire	11x4-5

Engine

Type	gasoline, 2-cylinder, air-cooled vertical-shaft V-Twin
Model	Kohler Courage Professional
Starter	electric
Fuel tank	4.3 gal (16.3 L)
Rated RPM	3600
Displacement	747 cc (45.6 ci)
Oil capacity	2 qts (1.9 L)
Power (gross)	21 hp (15.7 kW)
Starter volts	12

Dimensions

Width	47.5 inches (120 cm)
Length	76.4 inches (194 cm)
Weight	749 lbs (339 kg)
Wheelbase	45.5 inches (115 cm)
Rear tread	37.6 inches (95 cm)
Front tread	31.3 inches (79 cm)
Height (ROPS)	65 inches (165 cm)

Electrical

Ground	negative
Battery CCA	300
Battery volts	12
Charging amps	15

Mechanical

ROPS	Two-post fixed ROPS with suspended seat
Drive	Two-wheel drive
Steering	differential power

Production

Type	Zero-turn mower
Manufacturer	Kubota
Original price	$5,491 in 2015
Production years	2014 -

Attachments

Cut height	1.5 to 4.5 inch (3 to 11 cm)
Cutting width	48 inches (121 cm)
Overall width	61.1 inches (155 cm)
48" Mower deck	mid-mount Kubota RCK48P-124Z, 3-blade

Transmission