Raising the bar on everything! GX630 Honda V-twin engines offer higher horsepower, improved adaptability, quiet operation and greater fuel efficiency.
| Engine Type | Air-cooled 4-stroke OHV |
| Bore x Stroke | 78 X 72 mm |
| Displacement | 688 cm3 |
| Net Power Output* | 20.8 hp (15.5 kW) @ 3,600 rpm |
| Net Torque | 35.6 lbs ft (48.3 Nm) @ 2,500 rpm |
| PTO Shaft Rotation | Counterclockwise (from PTO shaft side) |
| Compression Ratio | 9.3:1 |
| Lamp/Charge coil options | 2.7A, 17A, 26A |
| Carburetor | Horizontal type, two barrel butterfly valve, internal vent |
| Ignition System | Digital CDI with variable ignition timing |
| Starting System | Electric |
| Lubrication System | Forced lubrication |
| Governor System | Mechanical |
| Air cleaner | Dual element |
| Oil Capacity | 2.1 US qt (2.0l) |
| Fuel | Unleaded 86 octane or higher |
| Dry Weight | 96.8 lb (44 kg) |