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
Model BT 173F(E)
Type 4-stroke, OHV, single cylinder
Displacement 243 cm2, (14.83 cu·in)
Max. horsepower 6.7 PS (4.9 kW; 6.5 HP) at 3,600 rpm
Max. torque 14.0 N·m (1.4 kg·m, 10.3 ft·lb)
Fuel system Carburetor
Cooling system Forced-air
Ignition system Transistorized
Lubricating system Splash system
Starting system 173F – Recoil starter
173FE – Electric staretr
Fuel tank capacity 5.2 L (1.37 US. gal. 1.14 Imp. gal.)
Fuel consumption 374 g/kWh
PTO shaft rotation Counterclockwise (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 valve 0.10-0.15 mm (0.004-0.006 in)
Exhaust valve 0.15-0.20 mm (0.006-0.008 in)
Oil system
Oil type 4-stroke engines oil
Recommended oil 10W-30
Oil capacity 1.1 L (1.16 US. qt, 0.97 Imp. qt.)
Ignition system
Ignition timing 23°±2° B.T.D.C. (Fixed)
Spark plug gap 0.6-0.8 mm (0.024-0.031 in)
Spark plug torque 20 N·m; 2.0 kg·m; 14.7 ft·lb
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