The Zongshen NH80 is a 72 cc, (4.82 cu·in) single-cylinder air-cooled 4-stroke internal combustion small gasoline engine, from NH-series manufactured by Zongshen Power Co.
It has a 51.0 mm (2.01 in) cylinder bore and 38.8 mm (1.53 in) piston stroke. Compression ratio rating is 7.6:1.
The Zongshen NH80 produced 2.0 PS (1.4 kW; 1.9 HP) at 3,600 rpm of maximum output power and 3.7 Nm (0.38 kg·m; 2.73 ft·lb) of maximum torque.
General information
| Engine Specifications | |
| Model | NH80 |
| Type | 4-stroke, OHV, single cylinder |
| Displacement | 72 cm2, (4.82 cu·in) |
| Max. horsepower | 2.0 PS (1.4 kW; 1.9 HP) at 3,600 rpm |
| Max. torque | 3.7 Nm (0.38 kg·m; 2.73 ft·lb) |
| Fuel system | Carburetor |
| Cooling system | Forced-air |
| Ignition system | – |
| Lubricating system | Splash system |
| Starting system | Recoil starter |
| Fuel tank capacity | – |
| Fuel consumption | 395 g/kWh |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Dimensions and Weight
| Zongshen NH80 | |
| Length, mm (in) | 333 (13.1) |
| Width, mm (in) | 241 (9.5) |
| Height, mm (in) | 322 (12.7) |
| Dry weight, kg (lb) | 9.3 kg (20.5 lbs) |
Maintenance data
| Engine | |
| Maximum speed: | 4,000 rpm |
| Idle speed: | 1,800±200 rpm |
| Valve clearance | |
| Intake valve | 0.10-0.15 mm (0.004-0.006 in) |
| Exhaust valve | 0.15-0.20 mm (0.006-0.008 in) |
| Oil system | |
| Oil type | 4-stroke engines oil |
| Recommended oil | 10W-30 |
| Oil capacity | 0.5 L (0.53 US. qt, 0.44 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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