The Honda G45 is a 240 cc (14.65 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Honda Motor Company from 1964 for general-purpose applications.
A 72.0 mm (2.83 in) cylinder bore and 59.0 mm (2.32 in) piston stroke give the G45 engine a total of 240 cc of displacement.
The Honda G45 engine produced 6.0 PS (4.4 kW; 5.9 HP) at 4,000 rpm of maximum output power.
The Honda G45 features:
- L-head design
- High voltage ignition system
- Horizontal type carburetor with butterfly valve
- Splash type lubrication system
- Recoil starter
General information
| Engine Specifications | |
| Engine model | G45 |
| Engine type | 4-stroke, L-head, single-cylinder |
| Displacement | 240 cm3, (14.65 cu·in) |
| Max. horsepower | 6.0 PS (4.4 kW; 5.9 HP) at 4,000 rpm |
| Max. torque | – |
| Cooling system | Forced air |
| Lubricating system | Splash |
| Ignition system | High voltage ignition |
| Fuel system | Horizontal type carburetor with butterfly valve |
| Fuel tank capacity | 6.0 L (1.59 US. gal. 1.32 Imp. gal.) |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Recoil starter |
| Stoping system | Ignition primary circuit ground |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 374 x 323 x 450 mm (14.7 x 12.7 x 17.7 in) |
| Dry weight | 23.0 kg (50.7 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | – |
| Cylinder bore: | 72.0 mm (2.83 in) |
| Piston stroke: | 59.0 mm (2.32 in) |
Service Data
| Cylinder compression: | 5.3 kg/cm2 (75 psi) |
| Valve clearance | |
| Tappet clearance : | 0.05-0.10 mm (0.002-0.0039 in) |
| Oil system | |
| Lubrication system: | Splash |
| Oil type: | Honda 4-stroke or an equivalent |
| Recommended oil: | SAE 10W-30 |
| Oil capacity: | 0.75 L (0.79 US. qt, 0.66 Imp. qt.) |
| Ignition system | |
| Type: | High voltage ignition |
| Spark plug: | NGK: B-4H |
| Spark plug gap: | 0.6-0.7 mm (0.0236-0.0276 in) |
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