The Zongshen GB1000S is a 999 cc, (60.96 cu·in) V-twin cylinders air-cooled 4-stroke internal combustion small gasoline engine, from GB-series manufactured by Zongshen Power Co. for general-purpose applications.
The Zongshen GB1000S engine has an overhead valve (OHV) design, carburetor fuel system, transistorized ignition system, and electric starter. The cylinder bore is 90.0 mm (3.54 in) and the piston stroke is 78.5 mm (3.09 in).
The Zongshen GB1000S produced 32.6 PS (24.0 kW; 32.2 HP) at 3,900 rpm of maximum output power and 71 N·m (7.2 kg·m, 52.3 ft·lb) of maximum torque.
General information
| Engine Specifications | |
| Model | GB1000S |
| Type | 4-stroke, OHV, V-twin |
| Displacement | 999 cm2, (60.96 cu·in) |
| Max. horsepower | 32.6 PS (24.0 kW; 32.2 HP) at 3,900 rpm |
| Max. torque | 71 N·m (7.2 kg·m, 52.3 ft·lb) |
| Fuel system | Carburetor |
| Cooling system | Forced-air |
| Ignition system | Transistorized |
| Lubricating system | Splash system |
| Starting system | Electric starter |
| Fuel tank capacity | – |
| Fuel consumption | 360 g/kWh |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Dimensions and Weight
| Zongshen GB1000S | |
| Length, mm (in) | 515 mm (20.3 in) |
| Width, mm (in) | 465 mm (18.3 in) |
| Height, mm (in) | 575 mm (22.6 in) |
| Dry weight, kg (lb) | 54.0 kg (119 lbs) |
Maintenance data
| Engine | |
| Maximum speed: | 3,900 rpm |
| Idle speed: | 1,650±150 rpm rpm |
| Oil system | |
| Oil type | 4-stroke engines oil |
| Recommended oil | 10W-30 |
| Oil capacity | 2.5 L (2.64 US. qt, 2.2 Imp. qt.) |
| Ignition system | |
| Spark plug gap | 0.6-0.8 mm (0.024-0.031 in) |
| Spark plug torque | 20 N·m; 2.0 kg·m; 14.7 ft·lb |
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