Kubota ZH600-B

Kubota ZH600-BThe Kubota ZH600-B is a 0.6 L (570 cc, 34.78 cu-in) straight-two, water-cooled naturally aspirated diesel engine from Kubota 70 mm series.

The Kubota ZH600-B engine has a spherical type сombustion сhamber with glow plug, Bosch K-type mini fuel injection pump, and Bosch throttle type injection nozzle. The compression ratio rating is 22.0. The cylinder bore and the piston stroke are 72.0 mm (2.83 in) and 70.0 mm (2.76 in), respectively.

The ZH600-B diesel engine produced 15.6 PS (11.5 kW; 15.5 HP) at 3,600 rpm of gross (intermittent) horsepower and 33.2 N·m (3.4 kg·m, 24.5 ft·lb) at 2,000 rpm of torque.

The breakdown of the engine code is as follows:

  • Z – 2-cylinders
  • 6 – Approximate displacement 600 cc

General information

Engine Specifications
Engine codeZH600-B
LayoutStraight-2, diesel engine
Fuel typeDiesel fuel No.2-D
Production
Displacement0.6 L, 570 cm3 (34.78 cu in)
Max. Horsepower Net (continuous): 11.7 PS (8.6 KW; 11.5 HP) at 3,200 rpm
Net (intermittent): 14.1 PS (10.4 kW; 13.9 HP) at 3,600 rpm
Gross (intermittent): 15.6 PS (11.5 kW; 15.5 HP) at 3,600 rpm
Torque output33.2 N·m (3.4 kg·m, 24.5 ft·lb) at 2,000 rpm
Injection typeIndirect injection
Cooling systemLiquid-cooled
Fuel injection pumpBosch K-type type mini fuel injection pump
Fuel nozzleBosch throttle type
Starting systemElectric starting with 12V (0.8 kW) starter
Starting support deviceGlow plug in combustion chamber
GovernorCentrifugal ball mechanical governor
Power adderNone
Firing order1-2
Dimensions (L x W x H):520 x 389 x 504 mm (20.5 x 15.4 x 19.8 in)
Weight69.7 kg (153.7 lbs)

Cylinder block

Cylinder block
Compression ratio:22.0:1
Cylinder bore:72.0 mm (2.83 in)
Piston stroke:70.0 mm (2.76 in)
Number of piston rings (compression / oil):2 / 1
Cylinder inner diameter:72.000-72.019 mm (2.8346-2.8354 in)
Piston skirt diameter
Piston ring side clearance:Second0.085-0.112 mm (0.0033-0.0044 in)
Oil0.020-0.055 mm (0.0008-0.0022 in)
Piston ring end gap:Top0.250-0.400 mm (0.0098-0.0157 in)
Second0.250-0.400 mm (0.0098-0.0157 in)
Oil0.250-0.400 mm (0.0098-0.0157 in)
Piston pin outer diameter20.002-20.011 mm (0.7875-0.7878 in)
Crankshaft main journal diameter:43.934-43.950 mm (1.7297-1.7303 in)
Crankpin diameter:36.959-36.975 mm (1.4551-1.4557 in)

Cylinder head

Cylinder head
Valves:4 (2 valves per cylinder)
Valve timing:INTAKE Open: 20° B.T.D.C.
Close: 45° A.B.D.C.
EXHAUST Open: 50° B.T.D.C.
Close: 15° A.B.D.C.
Valve seat width:INTAKE2.120 mm (0.0835 in)
EXHAUST2.120 mm (0.0835 in)
Valve stem diameter:INTAKE6.960-6.975 mm (0.274-0.2746 in)
EXHAUST6.960-6.975 mm (0.274-0.2746 in)
Valve spring free length:INTAKE35.100-34.800 mm (1.3819-1.3701 in)
EXHAUST35.100-34.800 mm (1.3819-1.3701 in)
Camshaft lobe height:INTAKE26.880 mm (1.0583 in)
EXHAUST26.880 mm (1.0583 in)
Camshaft journal diameter:32.934-32.950 mm (1.2966-1.2972 in)

Maintenance data

Valve clearance
Intake valve0.145-0.185 mm (0.0057-0.0073 in)
Exhaust valve0.145-0.185 mm (0.0057-0.0073 in)
Cooling system system
Coolant capacity:3.0 liters (3.2 US.qts, 2.6 Imp. qts)
Compression pressure
Standard3.09 MPa, 31.5 kgf/cm2, 448 psi
Oil system
Recommended engine oilCC or higher
SAE Viscosity NumberSAE 10W-30, 10W-40
Engine oil capacity2.55 L (2.69 US. qt, 2.24 Imp. qt.)
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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