The 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.
2-stroke, single cylinder
78.5 cm 3 (4.82 cu-in)
3.3 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
Transistor Circuit Ignition
Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity
PTO shaft rotation
Counterclockwise (from PTO shaft side)
Dimensions and Weight
Length, mm (in)
Width, mm (in)
Height, mm (in)
Dry weight, kg (lb)
2-stroke or an equivalent
Gasoline-lubricant mixture: 20-25:1
Spark plug gap
0.7-0.8 mm (0.028-0.031 in)
Spark plug tightening torque
27.5 N·m (2.8 kg·m, 20.3 ft·lb)
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