Shibaura H843

Shibaura H843The Shibaura H843 is a 1,396 cc (85.2 cu·in) straight-three, liquid-cooled, naturally aspirated diesel engine manufactured by Shibaura.

A 84.0 mm (3.31 in) cylinder bore and 84.0 mm (3.31 in) piston stroke give the H843 diesel engine a total of 1,396 cc (85.2 cu·in) of displacement. The compression ratio rating is 23.0:1.

This engine is equipped with glow plugs and oil bath type air cleaner.

The Shibaura H843 diesel engine produced 26.4 PS (19.4 KW; 26.0 HP) at 2,700 rpm of net horsepower and 75.5 Nm (7.7 kg·m; 55.7 lbf·ft) at 1,500 rpm of peak torque.

The breakdown of the engine code is as follows:

  • H – Engine series
  • 84 – 84.0 mm of cylinder bore
  • 3 – Three cylinders

General information

Engine Specifications
Engine codeH843
LayoutStraight-3, vertical diesel engine
Fuel typeDiesel fuel No.2-D
Displacement1.4 L, 1,396 cm3 (85.2 cu in)
Max. Horsepower (net)26.4 PS (19.4 KW; 26.0 HP) at 2,700 rpm
Torque output75.5 Nm (7.7 kg·m; 55.7 lbf·ft) at 1,500 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
Cylinder bore:84.0 mm (3.31 in)
Piston stroke:84.0 mm (3.31 in)
Number of piston rings (compression / oil):2 / 1

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:45.0-50.0 Nm (4.6-5.1 kgf·m; 33.2-36.9 ft·lb)
Main bearing holders:48.0-53.0 Nm (4.9-5.4 kgf·m; 35.4-39.1 ft·lb)
Crankshaft rear plate:46.0-54.0 Nm (4.7-5.5 kgf·m; 33.9-39.9 ft·lb)
Crankshaft pulley:49.0-59.0 Nm (5-6 kgf·m; 36.2-43.5 ft·lb)
Flywheel:56.0-69.0 Nm (5.7-7.0 kgf·m; 41.3-50.9 ft·lb)
Cylinder head: 10 mm bolts: 61.0 Nm (6.2 kgf·m; 45 ft·lb)
14 mm bolts: 129.0 Nm (13.2 kgf·m; 95.2 ft·lb)

Maintenance data

Engine speed
Governed speed Low Idle: 750-850 rpm
High Idle: 2,825-2,875 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
Standard22.5-23.5° BTDC
Oil system
Recommended engine oilCD or CE
SAE Viscosity NumberSAE 10W-30, 10W-40
Engine oil capacity5.3 liters (5.6 US.qts, 4.6 Imp. qts)
Electrical system
Ground polarity:Negative


The Shibaura H843 engine is used on the following tractors

ModelYears Produced
Ford 17101983-1986
Shibaura SD2203
Shibaura SD2243
Shibaura SD2843
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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