Zongshen 168FB(E)

Zongshen 168FB(E) engineThe Zongshen ZS 168FB(E) is a 0.2 L (196 cc, 11.96 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 ZS 168FB(E) engine has a single-cylinder, overhead valve (OHV) design, and recoil starter (168FB) or electric starter (168FBE). This engine used a carburetor fuel system, transistorized magneto ignition system, splash type lubricating system, and forced-air cooling system. The ZS 168FB(E) is equipped with a 2.6 L (0.69 US. gal. 0.57 Imp. gal.) fuel tank.

This engine produced 5.2 PS (3.8 kW; 5.1 HP) at 3,600 rpm of horsepower and 10.7 N·m (1.1 kg·m, 7.9 ft·lb) of peak torque.

General information

Engine Specifications
Engine model ZS 168FB(E)
Engine type 4-stroke, OHV, single-cylinder
Displacement 196 cm3, (11.96 cu·in)
Max. horsepower 5.2 PS (3.8 kW; 5.1 HP) at 3,600 rpm
Max. torque 10.7 N·m (1.1 kg·m, 7.9 ft·lb)
Cooling system Forced air
Lubricating system Splash
Ignition system Transistorized ignition
Fuel system Carburetor
Fuel consumption 374 g/kWh
Fuel tank capacity 2.6 L (0.69 US. gal. 0.57 Imp. gal.)
Fuel used Unleaded gasoline (octane number 86 or higher)
Starting system Recoil or electric starter
PTO shaft rotation Counterclockwise (from PTO shaft side)
Dimensions (L x W X H) 275 x 245 x 340 mm (10.8 x 9.6 x 13.4 in)
Dry weight 15.0 kg (33.1 lbs)

Cylinder Block and Head

It has a 68.0 mm (2.68 in) cylinder bore and 54.0 mm (2.13 in) piston stroke. Compression ratio rating is 8.5:1.

Cylinder block
Compression ratio: 8.5:1
Cylinder bore: 68.0 mm (2.68 in)
Piston stroke: 54.0 mm (2.13 in)
Crankshaft center distance: 27 mm (1.065 in)
Cylinder head
Valve arrangement: OHV, belt driven
Valves:: 2

Service Data

The 4-stroke engine oil with a viscosity of SAE 10W-30 is recommended for the ZS 168FB(E), refilling oil capacity is 0.6 L (0.63 US. qt, 0.53 Imp. qt.). The valve clearance is 0.10-0.15 mm (0.0039-0.0059 in) for intake valves and 0.15-0.20 mm (0.0059-0.0079 in) for exhaust valves.

Engine
Maximum speed: 3,900 rpm rpm
Idle speed: 1,800±200 rpm rpm
Valve clearance
Intake valve clearance (COLD): 0.10-0.15 mm (0.0039-0.0059 in)
Exhaust valve clearance (COLD): 0.15-0.20 mm (0.0059-0.0079 in)
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
Ignition timing: 24°±2° B.T.D.C.
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)

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