Zongshen 173F(E)

Zongshen 173F(E)The Zongshen 173F(E) is a 243 cc, (14.83 cu·in) single-cylinder air-cooled 4-stroke internal combustion small gasoline engine manufactured by Zongshen Power Co. for general-purpose applications.

The Zongshen 173F(E) engine has an overhead valve (OHV) design, carburetor fuel system, transistorized ignition system, and a recoil starter or electric starter. The Zongshen ZS 173F(E) engine a compression ratio rating is 8.4:1. Bore and stroke are 73.0 mm (2.87 in) and 54.0 mm (2.13 in), respectively.

The Zongshen ZS 173F(E) produced 6.7 PS (4.9 kW; 6.5 HP) at 3,600 rpm of maximum output power and 14.0 N·m (1.4 kg·m, 10.3 ft·lb) of maximum torque.

General information

Engine Specifications
ModelBT 173F(E)
Type4-stroke, OHV, single cylinder
Displacement243 cm2, (14.83 cu·in)
Max. horsepower6.7 PS (4.9 kW; 6.5 HP) at 3,600 rpm
Max. torque14.0 N·m (1.4 kg·m, 10.3 ft·lb)
Fuel systemCarburetor
Cooling systemForced-air
Ignition systemTransistorized
Lubricating systemSplash system
Starting system 173F – Recoil starter
173FE – Electric staretr
Fuel tank capacity5.2 L (1.37 US. gal. 1.14 Imp. gal.)
Fuel consumption374 g/kWh
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Zongshen ZS 173F(E)
Length, mm (in)435 (17.1)
Width, mm (in)370 (14.6)
Height, mm (in)425 (16.7)
Dry weight, kg (lb)25.0 (55.1)

Maintenance data

Maximum speed:3,900 rpm
Idle speed:1,800±200 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 capacity1.1 L (1.16 US. qt, 0.97 Imp. qt.)
Ignition system
Ignition timing23°±2° B.T.D.C. (Fixed)
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
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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