Zongshen 177F(E)

Zongshen 177F(E) engineThe Zongshen ZS 177F(E) is a 0.3 L (270 cc, 16.48 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 177F(E) engine has a single-cylinder, overhead valve (OHV) design, and recoil starter (177F) or electric starter (177FE). This engine used a carburetor fuel system, transistorized magneto ignition system, splash type lubricating system, and forced-air cooling system. The ZS 177F(E) is equipped with a 5.2 L (1.37 US. gal. 1.14 Imp. gal.) fuel tank.

The ZS 177F(E) engine produced 7.9 PS (5.8 kW; 7.8 HP) at 3,600 rpm of maximum horsepower and 15.8 N·m (1.6 kg·m, 11.6 ft·lb) of maximum torque.

General information

Engine Specifications
Engine modelZS 177F(E)
Engine type4-stroke, OHV, single-cylinder
Displacement270 cm3, (16.48 cu·in)
Max. horsepower7.9 PS (5.8 kW; 7.8 HP) at 3,600 rpm
Max. torque15.8 N·m (1.6 kg·m, 11.6 ft·lb)
Cooling systemForced air
Lubricating systemSplash
Ignition systemTransistorized ignition
Fuel systemCarburetor
Fuel consumption374 g/kWh
Fuel tank capacity5.2 L (1.37 US. gal. 1.14 Imp. gal.)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Starting systemRecoil or electric starter
Stoping systemIgnition primary circuit ground
GovernorCentrifugal govervor
PTO shaft rotationCounterclockwise (from PTO shaft side)
Dimensions (L x W X H)435 x 370 x 425 mm (17.1 x 14.6 x 16.7 in)
Dry weight25.0 kg (55.1 lbs)

Cylinder Block and Head

It has a 77.0 mm (3.03 in) cylinder bore and 58.0 mm (2.28 in) piston stroke. Compression ratio rating is 8.4:1.

Cylinder block
Compression ratio:8.4:1
Cylinder bore:77.0 mm (3.03 in)
Piston stroke:58.0 mm (2.28 in)
Crankshaft center distance:29 mm (1.14 in)
Cylinder head
Valve arrangement:OHV, belt driven

Service Data

The 4-stroke engine oil with a viscosity of SAE 10W-30 is recommended for the ZS 177F(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
Ignition system
Type:Transistorized ignition
Ignition timing:23°±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)
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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