Kubota ZB400

Kubota ZB400The Kubota ZB400 is a 400 cc (24.4 cu·in) straight-two, water-cooled horizontal naturally aspirated diesel engine manufactured by Kubota since 1980.

The Kubota ZB400 engine used pre-combustion (TVCS) combustion method. The cylinder bore is 64.0 mm (2.52 in) and the piston stroke is 62.2 mm (2.45 in).

The ZB400 diesel engine produced 10.6 PS (7.83 KW; 10.5 HP) at 3,200 rpm of gorss horsepower and 9.1 PS (6.71 KW; 9.0 HP) at 3,200 rpm of net intermittent power.

The breakdown of the engine code is as follows:

  • Z – 2-cylinders
  • 400 – Approximate displacement 400 cc

General information

Engine Specifications
Engine code ZB400
Layout Straight-2, horizontal diesel engine
Fuel type Diesel fuel No.2-D
Production
Displacement 0.4 L, 400 cm3 (24.4 cu in)
Max. Horsepower Gross: 10.6 PS (7.83 KW; 10.5 HP) at 3,200 rpm
Net Intermittent: 9.1 PS (6.71 KW; 9.0 HP) at 3,200 rpm
Torque output
Injection type Indirect injection
Fuel system Fuel injection pump
Cooling system Water with pressurized radiator
Starting system Electric starting with 12V (0.8 kW) starter
Starting support device
Governor Centrifugal mechanical governor
Power adder None
Firing order 1-2
Dimensions (L x W x H): 460 x 404 x 462 mm (18.1 x 15.9 x 18.2 in)
Weight 60 kg (132.2 lbs)

Cylinder block

Cylinder block
Compression ratio:
Cylinder bore: 64.0 mm (2.52 in)
Piston stroke: 62.2 mm (2.45 in)
Number of piston rings (compression / oil): 2 / 1

Maintenance data

Oil system
Recommended engine oil СС or better
SAE Viscosity Number SAE 10W-30, 10W-40
Engine oil capacity 2.0 liters (2.11 US.qts, 1.76 Imp. qts)
Cooling system
Type Water with pressurized radiator
Coolant capacity 1.9 liters (2.0 US.qts, 1.67 Imp. qts)
Electrical system
Battery: 12V, 35Ah or equivalent
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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