The Zongshen GB270 is a 0.27 L (272 cc, 16.6 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Zongshen Power Co for general-purpose applications.
The Zongshen GB270 engine has a single-cylinder, overhead valve (OHV) design, and recoil or electric starter. This engine used a carburetor fuel system, transistorized magneto ignition system, splash type lubricating system, and forced-air cooling system. The ZS GB270 is equipped with a 3.6 L (0.95 US. gal. 0.79 Imp. gal.) fuel tank.
The GB270 engine produced 7.9 PS (5.8 kW; 7.8 HP) at 3,600 rpm of maximum horsepower and 15.5 N·m (1.6 kg·m, 11.4 ft·lb) of maximum torque.
General information
Engine Specifications | |
Engine model | GB270 |
Engine type | 4-stroke, OHV, single-cylinder |
Displacement | 272 cm3, (16.60 cu·in) |
Max. horsepower | 7.9 PS (5.8 kW; 7.8 HP) at 3,600 rpm |
Max. torque | 15.5 N·m (1.6 kg·m, 11.4 ft·lb) |
Cooling system | Forced air |
Lubricating system | Splash |
Ignition system | Transistorized ignition |
Fuel system | Carburetor |
Fuel consumption | 375 g/kWh |
Fuel tank capacity | 3.6 L (0.95 US. gal. 0.79 Imp. gal.) |
Fuel used | Unleaded gasoline (octane number 86 or higher) |
Starting system | Recoil / electric starter |
PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Dry weight | 17.2 kg (37.9 lbs) |
Cylinder Block and Head
Cylinder bore is 75.0 mm (2.95 in) and piston stroke is 61.5 mm (2.42 in).
Cylinder block | |
Compression ratio: | – |
Cylinder bore: | 75.0 mm (2.95 in) |
Piston stroke: | 61.5 mm (2.42 in) |
Number of piston rings (compression / oil): | 2/1 |
Number of main bearings: | 2 |
Crankshaft center distance: | 30.75 mm (1.21 in) |
Cylinder head | |
Valve arrangement: | OHV |
Valves: | 2 |
Service Data
The 4-stroke engine oil with a viscosity of SAE 10W-30 is recommended for the GB270, refilling oil capacity is 0.6 L (0.63 US. qt, 0.53 Imp. qt.).
Engine | |
Maximum speed: | 3,600 rpm |
Idle speed: | 1,450±150 rpm |
Oil system | |
Lubrication system: | Splash |
Oil type: | 4-stroke engine oil |
Recommended oil: | SAE 10W-30 |
Oil capacity: | 0.6 L (0.63 US. qt, 0.53 Imp. qt.) |
Fuel system | |
Type: | Carburetor |
Ignition system | |
Type: | Transistorized ignition |
Spark plug gap: | 0.6-0.8 mm (0.0236-0.0315 in) |
Spark plug torque: | 20 N·m (2 kg·m, 14.7 ft·lb) |
Be the first to comment