Subaru-Robin EC08B

Subaru-Robin EC08BThe Subaru-Robin EC08B is a 78.5 cc (4.82 cu·in) single-cylinder air-cooled 2-stroke internal combustion general-purpose gasoline engine with horizontal PTO shaft and speed reduction system..

The Subaru-Robin EC08B engine has a lined aluminum cylinder, float type carburetor, T.C.I. ignition system (Transistor Circuit Ignition), recoil starter and speed reduction system with 1:2.5 reduction gear.

The cylinder bore is 50.0 mm (1.97 in) and the piston stroke is 40.0 mm (1.57 in). The EC08B engine produced 3.3 PS (2.4 kW; 3.2 HP) at 2,200 rpm of maximum horsepower and 2.2 PS (1.6 kW; 2.2 HP) at 1,800 rpm of continuous power. Maximum torque is 12.5 N·m (1.3 kg·m, 9.2 ft·lb) at 1,440 rpm.

General information

Engine Specifications
ModelEC08B
Type2-stroke, single cylinder
Displacement78.5 cm 3 (4.82 cu-in)
Max. horsepower3.3 PS (2.4 kW; 3.2 HP) at 2,200 rpm
Max. torque (crank PTO)12.5 N·m (1.3 kg·m, 9.2 ft·lb) at 1,440 rpm
CarburetorFloat type
Cooling systemForced-air
Ignition systemTransistor Circuit Ignition
Lubricating systemMechanical splashing
Starting systemRecoil
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity1.5 L
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Subaru-Robin EC08B
Length, mm (in)285 (11.2)
Width, mm (in)307 (12.1)
Height, mm (in)287 (11.3)
Dry weight, kg (lb)8.8 (19.4)

Service Information

Oil system
Oil type2-stroke or an equivalent
Recommended oilSAE 30
Oil capacityGasoline-lubricant mixture: 20-25:1
Ignition system
Spark plugNGK: B7HS
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
Spark plug tightening torque27.5 N·m (2.8 kg·m, 20.3 ft·lb)
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