Shibaura S723

Shibaura S723The Shibaura S723 is a 879 cc (53.6 cu·in) straight-three, water-cooled naturally aspirated diesel engine manufactured by Shibaura.

A 72.0 mm (2.83 in) cylinder bore and 72.0 mm (2.83 in) piston stroke give the S723 diesel engine a total of 879 cc (53.6 cu·in) of displacement. The compression ratio rating is 23.0:1 or 24.0:1. This engine is equipped with glow plugs and dry type air cleaner.

The Shibaura S723 diesel engine produced 16.2 PS (11.9 KW; 16.0 HP) at 2,700 rpm of maximum net horsepower and 48.8 Nm (4.98 kg·m; 36.01 lbf·ft) at 1,800 rpm of peak torque.

The breakdown of the engine code is as follows:

  • S – Engine series
  • 72 – 72.0 mm of cylinder bore
  • 3 – Three cylinders

General information

Engine Specifications
Engine codeS723
LayoutStraight-3, vertical diesel engine
Fuel typeDiesel fuel No.2-D
Displacement0.9 L, 879 cm3 (53.6 cu in)
Max. Horsepower (net) 14.1 PS (10.4 KW; 14.0 HP) at 2,500 rpm
16.2 PS (11.9 KW; 16.0 HP) at 2,700 rpm
Torque output48.8 Nm (4.98 kg·m; 36.01 lbf·ft) at 1,800 rpm
Injection typeIndirect injection
Cooling systemLiquid-cooled
Fuel systemFuel injection pump
Starting systemElectric starting
Starting support deviceGlow plug in combustion chamber
Power adderNone
Firing order1-2-3

Cylinder block

Cylinder block
Compression ratio:23.0:1 or 24.0:1
Cylinder bore:72.0 mm (2.83 in)
Piston stroke:72.0 mm (2.83 in)
Number of piston rings (compression / oil):2 / 1
Crankshaft main journal diameter:45.964-45.975 mm (1.8096-1.8100 in)
Crankpin diameter:38.964-38.975 mm (1.5340-1.5344 in)

Cylinder head

Cylinder head
Valve Arrangement:
Valves:6 (2 valves per cylinder)
Valve seat angle:INTAKE45°
Valve face angle:INTAKE45°

Tightening torque

Tightening torque specs
Connecting rod caps:29.0-34.0 Nm (3-3.5 kgf·m; 21.4-25.1 ft·lb)
Main bearing holders:25.0-29.0 Nm (2.6-3.0 kgf·m; 18.5-21.4 ft·lb)
Flywheel:56.0-69.0 Nm (5.7-7.0 kgf·m; 41.3-50.9 ft·lb)
Cylinder head:48.0 Nm (4.9 kgf·m; 35.4 ft·lb)

Maintenance data

Engine speed
Governed speed Low Idle: 750-850 rpm
High Idle: 2,750-2,800 rpm
Valve clearance
Intake valve0.20 mm (0.008 in)
Exhaust valve0.20 mm (0.008 in)
Injector opening pressure
Standard11,760 kPa (1705 psi)
Injection timing
Standard24° BTDC
Oil system
Recommended engine oilCD or CE
SAE Viscosity NumberSAE 10W-30, 10W-40
Engine oil capacity3.3 liters (3.49 US.qts, 2.9 Imp. qts)
Electrical system
Alternator:12V, 35A
Ground polarity:Negative


The Shibaura S723 engine is used on the following tractors

ModelYears Produced
Ford 11201987-1993
Ford 12101983-1986
Ford 12151993-1998
New Holland 11201987-1983
New Holland 12151996-1998
Shibaura SP1440
Shibaura SP1840
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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