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
Type4-stroke, OHV, two cylinders
Displacement1.3 L, 1,263 cm3 (77.1 cu-in)
Max. horsepower23.0 HP (17.1 kW)
Max. torque (crank PTO)
Cooling systemLiquid-cooled
Fuel injection pumpKiki
Starting systemHitachi S12-61 electric starter
Fuel usedDiesel fuel

Service Information

Maximum speed2,600 ± 150 rpm
Idle speed750 ± 150 rpm
Valve clearance
Intake valve0.30 mm (0.012)
Exhaust valve0.35 mm (0.014)
Oil system
Oil typeDiesel oil (API Service Classification CC or CD)
Recommended oilSAE 10W-30
Oil capacity With filter change: 4.6 l (5.0 qt.)
Without filter change: 4.0 l (4.2 qt.)
Electrical system
AlteratorHitachi L115-5B (12V-15A)
Voltage regulatorHitachi TRIZ-34
StarterHitachi S12-61
Fuel system
Fuel pumpKiki NP-PE
Injection timing20° B.T.D.C.
Fuel nozzle pressure1710-1840 psi
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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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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