Zongshen GB680

Zongshen GB680The Zongshen GB680 is a 679 cc, (41.44 cu·in) V-twin air-cooled 4-stroke internal combustion small gasoline engine, from GB-series manufactured by Zongshen Power Co. for general-purpose applications.

The Zongshen GB680 engine has an overhead valve (OHV) design, carburetor fuel system, transistorized ignition system, and recoil or electric starter. The cylinder bore is 78.0 mm (3.07 in) and the piston stroke is 71.0 mm (2.8 in). Compression ratio rating is 8.5:1.

The Zongshen GB680 produced 19.7 PS (14.5 kW; 19.4 HP) at 3,600 rpm of maximum output power and 42 N·m (4.3 kg·m, 31 ft·lb) of maximum torque.

General information

Engine Specifications
ModelGB680
Type4-stroke, OHV, V-twin
Displacement679 cm2, (41.44 cu·in)
Max. horsepower19.7 PS (14.5 kW; 19.4 HP) at 3,600 rpm
Max. torque42 N·m (4.3 kg·m, 31 ft·lb)
Fuel systemCarburetor
Cooling systemForced-air
Ignition systemTransistorized
Lubricating systemSplash system
Starting systemRecoil or electric starter
Fuel tank capacity
Fuel consumption370 g/kWh
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Zongshen GB680
Length, mm (in)462 mm (18.2 in)
Width, mm (in)428 mm (16.9 in)
Height, mm (in)456 mm (18.0 in)
Dry weight, kg (lb)46.5 kg (102.5 lbs)

Maintenance data

Engine
Maximum speed:3,900 rpm
Idle speed:1,440±140 rpm
Valve clearance
Intake valve0.10-0.15 mm (0.004-0.006 in)
Exhaust valve0.15-0.20 mm (0.006-0.008 in)
Oil system
Oil type4-stroke engines oil
Recommended oil10W-30
Oil capacity1.2 L (1.27 US. qt, 1.06 Imp. qt.)
Ignition system
Spark plug gap0.6-0.8 mm (0.024-0.031 in)
Spark plug torque20 N·m; 2.0 kg·m; 14.7 ft·lb
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