The Subaru-Robin EC08B is a 78.5 cc (4.82 cu·in) natural aspirated single-cylinder two-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft and 1:2.5 speed reduction system.
The Subaru-Robin EC08B engine has a single-cylinder, float type carburetor, flywheel magneto type ignition system (contactless magneto type ignition available as an option), and recoil starter. The engine is fitted with a semi-wet type air cleaner. The EC08B is equipped with a 1.5 L (0.4 US. gal. 0.33 Imp. gal.) fuel tank.
Cylinder bore and piston stroke are 50.0 mm (1.97 in) and 40.0 mm (1.57 in), respectively. The Subaru-Robin EC08B engine produced 3.3 PS (2.4 kW; 3.2 HP) at 2,200 rpm of maximum output power and 12.5 N·m (1.3 kg·m, 9.2 ft·lb) at 1,440 rpm of peak torque.
General information
| Engine Specifications | |
| Engine model | EC08B |
| Engine type | 2-stroke, Piston Valve Type, single-cylinder |
| Displacement | 78.5 cm3, (4.82 cu·in) |
| Max. horsepower | 3.3 PS (2.4 kW; 3.2 HP) at 2,200 rpm |
| Max. torque | 12.5 N·m (1.3 kg·m, 9.2 ft·lb) at 1,440 rpm |
| Cooling system | Forced air |
| Air cleaner | Semi-wet type |
| Lubricating system | Fuel-lubricant Mixture Type |
| Ignition system | Flywheel Magneto Type (Contactless Magneto Type available as option) |
| Fuel system | Float type carburetor |
| Fuel consumption | 380 g/HPh |
| Fuel tank capacity | 1.5 L (0.4 US. gal. 0.33 Imp. gal.) |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Recoil starter |
| Governor | Centrifugal flyweight type |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Speed Reduction System | 1:2.5 reduction gear |
| Dimensions (L x W X H) | 285 x 307 x 287 mm (11.2 x 12.1 x 11.3 in) |
| Dry weight | 8.8 kg (19.4 lbs) |
Service Data
| Oil system | |
| Lubrication system: | Fuel-lubricant Mixture Type |
| Recommended oil: | 2-Cycle Engine Oil |
| Oil capacity | Gasoline-lubricant mixture: 25:1 |
| Fuel system | |
| Type: | Float type carburetor |
| Ignition system | |
| Type: | Flywheel Magneto Type (Contactless Magneto Type available as option) |
| Spark plug: | NGK: B7HS |
| Spark plug torque: | 27.5 N·m (2.8 kg·m, 20.3 ft·lb) |
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