The Honda GXV670 is a 670 cc, (40.9 cu·in) natural aspirated two-cylinders four-stroke air-cooled internal combustion small gasoline engine with a vertical shaft, for general-purpose applications.
A 77.0 mm (3.03 in) cylinder bore and 72.0 mm (2.83 in) piston stroke give the GXV670 engine a total of 670 cc of displacement. The compression ratio rating is 8.3:1.
The Honda GXV670 engine produced 24.1 PS (17.7 kW; 23.7 HP) at 3,600 rpm of maximum output power and 50.8 N·m (5.2 kg·m, 37.4 ft·lb) at 2,500 rpm of peak torque.
The Honda GXV670 features:
- Overhaed valve (OHV) design
- Transistorized magneto ignition
- Horizontal type carburetor with butterfly valve
- Centrifugal governor
- Forced lubrication lubrication system
- Forced air cooling system
- Electric starter
General information
| Engine Specifications | |
| Engine model | GXV670 |
| Engine type | 4-stroke, OHV, V-Twin |
| Displacement | 670 cm3, (40.9 cu·in) |
| Max. horsepower | 24.1 PS (17.7 kW; 23.7 HP) at 3,600 rpm |
| Max. torque | 50.8 N·m (5.2 kg·m, 37.4 ft·lb) at 2,500 rpm |
| Cooling system | Forced air |
| Air cleaner | Dual element type |
| Lubricating system | Forced lubrication |
| Ignition system | Transistorized magneto ignition |
| Fuel system | Horizontal type carburetor with butterfly valve |
| Fuel consumption | 265 g/HPh |
| Fuel tank capacity | – |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Electric starter |
| Stoping system | Ignition primary circuit ground |
| Governor | Centrifugal governor |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 464 x 573 x 449 mm (18.3 x 18.6 x 17.7 in) |
| Dry weight | 45.3 kg (99.9 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 8.3:1 |
| Cylinder bore: | 77.0 mm (3.03 in) |
| Piston stroke: | 72.0 mm (2.83 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Crankshaft center distance: | 36 mm (1.415 in) |
| Cylinder head | |
| Valve arrangement: | OHV, belt driven |
| Valves: | 2,(4 valves in total) |
Service Data
| Engine | |
| Maximum speed: | 3400±100 rpm |
| Idle speed: | 1400±150 rpm |
| Cylinder compression: | 6.0-8.0 kg/cm2 (85-114 psi) at 500 rpm |
| Valve clearance | |
| Intake valve clearance: | 0.15±0.02 mm (0.006±0.001 in) |
| Exhaust valve clearance: | 0.20±0.02 mm (0.008±0.001 in) |
| Oil system | |
| Lubrication system: | Forced lubrication |
| Oil type: | Honda 4-stroke or an equivalent (SG or SF) |
| Recommended oil: | SAE 10W-30 |
| Oil capacity: | Without oil filter: 2.2 L (2.32 US. qt, 1.94 Imp. qt.) With oil filter: 2.5 L (2.6 US. qt, 2.2 Imp. qt.) |
| Fuel system | |
| Type: | Horizontal type carburetor with butterfly valve |
| Ignition system | |
| Type: | Transistorized magneto ignition |
| Spark plug: | NGK: ZGR5A DENSO: J16CR-U |
| Spark plug gap: | 0.7-0.8 mm (0.0276-0.0315 in) |
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