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.
|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|
|Ignition system||Transistorized ignition|
|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 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)|
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.).
|Maximum speed:||3,600 rpm|
|Idle speed:||1,450±150 rpm|
|Oil type:||4-stroke engine oil|
|Recommended oil:||SAE 10W-30|
|Oil capacity:||0.6 L (0.63 US. qt, 0.53 Imp. qt.)|
|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)|