The Zongshen ZS 170F(E) is a 0.2 L (208 cc, 12.69 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 170F(E) engine has a single-cylinder, overhead valve (OHV) design, and recoil starter (170F) or electric starter (170FE). This engine used a carburetor fuel system, transistorized magneto ignition system, splash type lubricating system, and forced-air cooling system. The ZS 170F(E) is equipped with a 2.6 L (0.69 US. gal. 0.57 Imp. gal.) fuel tank.
The Zongshen ZS 170F(E) engine produced 5.4 PS (4.0 kW; 5.5 HP) at 3,600 rpm of maximum output power and 11.0 N·m (1.1 kg·m, 8.1 ft·lb) of peak torque.
|Engine model||ZS 170F(E)|
|Engine type||4-stroke, OHV, single-cylinder|
|Displacement||208 cm3, (12.69 cu·in)|
|Max. horsepower||5.4 PS (4.0 kW; 5.5 HP) at 3,600 rpm|
|Max. torque||11.0 N·m (1.1 kg·m, 8.1 ft·lb)|
|Cooling system||Forced air|
|Ignition system||Transistorized ignition|
|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)||390 x 330 x 350 mm (15.4 x 13 x 13.8 in)|
|Dry weight||15.5 kg (34.2 lbs)|
Cylinder Block and Head
It has a 70.0 mm (2.76 in) cylinder bore and 54.0 mm (2.13 in) piston stroke. Compression ratio rating is 8.1:1.
|Cylinder bore:||70.0 mm (2.76 in)|
|Piston stroke:||54.0 mm (2.13 in)|
|Crankshaft center distance:||27 mm (1.065 in)|
|Valve arrangement:||OHV, belt driven|
The 4-stroke engine oil with a viscosity of SAE 10W-30 is recommended for the ZS 170F(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 (0.004-0.006 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|
|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 type:||4-stroke engine oil|
|Recommended oil:||SAE 10W-30|
|Oil capacity:||0.6 L (0.63 US. qt, 0.53 Imp. qt.)|
|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)|