Zongshen GB225

Zongshen GB225The Zongshen GB225 is a 0.2 L (223 cc, 13.61 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 GB225 engine has a single-cylinder, overhead valve (OHV) design, and recoil starter. This engine used a carburetor fuel system, transistorized magneto ignition system, splash type lubricating system, and forced-air cooling system. The ZS GB225 is equipped with a 2.6 L (0.69 US. gal. 0.57 Imp. gal.) fuel tank.

The Zongshen GB225 engine produced 6.0 PS (4.4 kW; 5.9 HP) at 3,600 rpm of maximum output power and 12.9 N·m (1.3 kg·m, 9.5 ft·lb) of peak torque.

General information

Engine Specifications
Engine modelGB225
Engine type4-stroke, OHV, single-cylinder
Displacement223 cm3, (13.61 cu·in)
Max. horsepower6 PS (4.4 kW; 5.9 HP) at 3,600 rpm
Max. torque12.9 N·m (1.3 kg·m, 9.5 ft·lb
Cooling systemForced air
Lubricating systemSplash
Ignition systemTransistorized ignition
Fuel systemCarburetor
Fuel consumption375 g/kWh
Fuel tank capacity2.6 L (0.69 US. gal. 0.57 Imp. gal.)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Starting systemRecoil starter
PTO shaft rotationCounterclockwise (from PTO shaft side)
Dry weight16.5 kg (36.4 lbs)

Cylinder Block and Head

Cylinder bore is 72.0 mm (2.83 in) and piston stroke is 55.0 mm (2.17 in).

Cylinder block
Compression ratio:
Cylinder bore:72.0 mm (2.83 in)
Piston stroke:55.0 mm (2.17 in)
Number of piston rings (compression / oil):2/1
Number of main bearings:2
Crankshaft center distance:27.5 mm (1.085 in)
Cylinder head
Valve arrangement:OHV

Service Data

The 4-stroke engine oil with a viscosity of SAE 10W-30 is recommended for the GB225, 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 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
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)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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