Zongshen 190F(E)

Zongshen 190F(E) engineThe Zongshen ZS 190F(E) is a 0.4 L (420 cc, 25.63 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 190F(E) engine has a single-cylinder, overhead valve (OHV) design, and recoil starter (190F) or electric starter (190FE). This engine used a carburetor fuel system, transistorized magneto ignition system, splash type lubricating system, and forced-air cooling system. The ZS 190F(E) is equipped with a 5.2 L (1.37 US. gal. 1.14 Imp. gal.) fuel tank.

The ZS 190F(E) engine produced 10.6 PS (7.8 kW; 10.5 HP) at 3,600 rpm of maximum horsepower and 23.0 N·m (2.3 kg·m, 17 ft·lb) of maximum torque.

General information

Engine Specifications
Engine model ZS 190F(E)
Engine type 4-stroke, OHV, single-cylinder
Displacement 420 cm3, (25.63 cu·in)
Max. horsepower 10.6 PS (7.8 kW; 10.5 HP) at 3,600 rpm
Max. torque 23.0 N·m (2.3 kg·m, 17 ft·lb)
Cooling system Forced air
Lubricating system Splash
Ignition system Transistorized ignition
Fuel system Carburetor
Fuel consumption 370 g/kWh
Fuel tank capacity 5.2 L (1.37 US. gal. 1.14 Imp. gal.)
Fuel used Unleaded gasoline (octane number 86 or higher)
Starting system Recoil or electric starter
Stoping system Ignition primary circuit ground
Dimensions (L x W X H) 460 x 405 x 430 mm (18.1 x 15.9 x 16.9 in)
Dry weight 31.0 kg (68.3 lbs)

Cylinder Block and Head

Cylinder bore is 90.0 mm (3.54 in) and piston stroke is 66.0 mm (2.6 in). Compression ratio rating is 8.4:1.

Cylinder block
Compression ratio: 8.4:1
Cylinder bore: 90.0 mm (3.54 in)
Piston stroke: 66.0 mm (2.6 in)
Number of piston rings (compression / oil): 2/1
Number of main bearings: 2
Crankshaft center distance: 33 mm (1.3 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 190F(E), refilling oil capacity is 1.1 L (1.16 US. qt, 0.97 Imp. qt.). The valve clearance is 0.10-0.15 mm (0.004-0.006 in) for intake valves and 0.15-0.20 mm (0.006-0.008 in) for exhaust valves.

Maximum speed: 3,900 rpm rpm
Idle speed: 1,800±200 rpm rpm
Valve clearance
Intake valve clearance (COLD): 0.10-0.15 mm (0.004-0.006 in)
Exhaust valve clearance (COLD): 0.15-0.20 mm (0.006-0.008 in)
Oil system
Lubrication system: Splash
Oil type: 4-stroke engine oil
Recommended oil: SAE 10W-30
Oil capacity: 1.1 L (1.16 US. qt, 0.97 Imp. qt.)
Fuel system
Type: Carburetor
Ignition system
Type: Transistorized ignition
Ignition timing: 25°±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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