Toyosha S126

Toyosha S126 diesel engineThe Toyosha S126 is a 1.3 l (1,263 cc, 77.07 cu-in) two-cylinder liquid-cooled 4-stroke internal combustion diesel engine, manufactured by Japanese company Hinomoto under the Toyosha brand.

This engine has two cylinders, overhead valves (2 per cylinder), three main bearings, flyweight governor and Kiki fuel injection pump. The S126 engine uses Hitachi S12-61 electric starter, Hitachi L115-5B (12V-15A) alternator and Hitachi TRIZ-34 voltage regulator.

A 92 mm (3.62 in) cylinder bore and 95 mm (3.74 in) piston stroke give the motor a total of 1,263 cc, (77.07 cu-in) of displacement. Compression ratio rating is 23:1. The Toyosha S126 engine produced 23.0 HP (17.1 kW) of maximum output.

General information

Engine Specifications
Model S126
Type 4-stroke, OHV, two cylinders
Displacement 1.3 L, 1,263 cm3 (77.1 cu-in)
Max. horsepower 23.0 HP (17.1 kW)
Max. torque (crank PTO)
Cooling system Liquid-cooled
Fuel injection pump Kiki
Starting system Hitachi S12-61 electric starter
Fuel used Diesel fuel

Service Information

Maximum speed 2,600 ± 150 rpm
Idle speed 750 ± 150 rpm
Valve clearance
Intake valve 0.30 mm (0.012)
Exhaust valve 0.35 mm (0.014)
Oil system
Oil type Diesel oil (API Service Classification CC or CD)
Recommended oil SAE 10W-30
Oil capacity With filter change: 4.6 l (5.0 qt.)
Without filter change: 4.0 l (4.2 qt.)
Electrical system
Alterator Hitachi L115-5B (12V-15A)
Voltage regulator Hitachi TRIZ-34
Starter Hitachi S12-61
Fuel system
Fuel pump Kiki NP-PE
Injection timing 20° B.T.D.C.
Fuel nozzle pressure 1710-1840 psi
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1 Comment

  1. NOT complaining, just FYI: You have a typo under electrical; in place of “alternator” you have “Alter-ator.” The hyphen (-) indicates the missing letter “n”.

    Thank you for providing all this information.

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