The Honda GX80 is a 79.7 cc, (4.88 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Honda Motor Company for general-purpose applications.
Cylinder bore is 46.0 mm (1.81 in) and piston stroke is 48.0 mm (1.89 in). The compression ratio rating is 9.0:1.
This engine produces 2.0 PS (1.5 kW; 2.0 HP) at 3,600 rpm of horsepower and 4.5 N·m (0.5 kg·m, 3.3 ft·lb) at 2,500 rpm of torque.
The Honda GX80 features:
- OHC design
- Transistorized magneto ignition system
- Horizontal type carburetor with butterfly valve
- Centrifugal governor
- Splash lubrication system
- Forced air cooling system
- Recoil starter
General information
| Engine Specifications | |
| Engine model | GX80 |
| Engine type | 4-stroke, OHC, single-cylinder |
| Displacement | 79.7 cm3, (4.88 cu·in) |
| Max. horsepower | 2.0 PS (1.5 kW; 2.0 HP) at 3,600 rpm |
| Max. torque | 4.5 N·m (0.5 kg·m, 3.3 ft·lb) at 2,500 rpm |
| Cooling system | Forced air |
| Air cleaner | Dual type (foam and paper) |
| Lubricating system | Splash |
| Ignition system | Transistorized magneto ignition |
| Fuel system | Horizontal type carburetor with butterfly valve |
| Fuel consumption | 0.6 L/h at 3,600 rpm |
| 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 |
| Stoping system | Ignition primary circuit ground |
| Governor | Centrifugal governor |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 275 x 342 x 323 mm (10.8 x 13.5 x 12.7 in) |
| Dry weight | 11.1 kg (24.5 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 9.0:1 |
| Cylinder bore: | 46.0 mm (1.81 in) |
| Piston stroke: | 48.0 mm (1.89 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Cylinder head | |
| Valve arrangement: | OHC, belt driven |
| Valves: | 2 |
Service Data
| Valve clearance | |
| Intake valve clearance (COLD): | 0.10±0.02 mm (0.004±0.001 in) |
| Exhaust valve clearance (COLD): | 0.15±0.02 mm (0.006±0.001 in) |
| Oil system | |
| Lubrication system: | Splash type |
| Oil type: | SF or higher |
| Recommended oil: | SAE 10W-30 |
| Oil capacity: | 0.36 L (0.38 US. qt, 0.32 Imp. qt.) |
| Ignition system | |
| Type: | Transistorized magneto ignition |
| Spark plug: | NGK C4HSB |
| Spark plug gap: | 0.7-0.8 mm (0.0276-0.0315 in) |
Applications
| Manufacturer or Brand | Models |
| Generators | |
| Honda | EG1000N |
| Tillers | |
| Honda | F300D |
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