Toyosha S148

The Toyosha S148 is a 1.5 l (1,477 cc, 90.13 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 S148 engine uses Hitachi S13-31 electric starter, Hitachi L115-5B (12V-15A) alternator and Hitachi TRIZ-34 voltage regulator.

Bore and stroke are 97.0 mm (3.82 in) and 100.0 mm (3.94 in), respectively. Compression ratio rating is 23:1. The Toyosha S148 engine produced 28.0 HP (20.9 kW) at 2,500 rpm of maximum output.

General information

Engine Specifications
Model	S148
Type	4-stroke, OHV, two cylinders
Displacement	1.5 L, 1,477 cm3 (90.1 cu-in)
Max. horsepower	28.0 HP (20.9 kW) at 2,500 rpm
Max. torque (crank PTO)	–
Cooling system	Liquid-cooled
Fuel injection pump	Kiki PES-2K
Starting system	Hitachi S13-31 electric starter
Fuel used	Diesel fuel

Service Information

Engine
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 S13-31
Fuel system
Fuel pump	Kiki PES-2K
Injection timing	22° B.T.D.C.
Fuel nozzle pressure	1710-1840 psi