The Zongshen 161F is a 123 cc, (7.51 cu·in) single-cylinder air-cooled 4-stroke internal combustion small gasoline engine manufactured by Zongshen Power Co. for general-purpose applications.
The Zongshen BT161F engine has an overhead valve (OHV) design, carburetor fuel system, transistorized ignition system, and a recoil starter. The ZS 161F engine a compression ratio rating is 8.7:1, cylinder bore and piston stroke are 61.0 mm (2.4 in) and 42.0 mm (1.65 in), respectively.
The Zongshen ZS 161F produced 3.0 PS (2.2 kW, 3.0 HP) at 3,600 rpm of maximum horsepower.
4-stroke, OHV, single cylinder
123 cm2, (7.51 cu·in)
3.0 PS (2.2 kW, 3.0 HP) at 3,600 rpm
Fuel tank capacity
1.5 L (0.4 US. gal. 0.33 Imp. gal.)
PTO shaft rotation
Counterclockwise (from PTO shaft side)
Dimensions and Weight
Zongshen ZS 161F
Length, mm (in)
Width, mm (in)
Height, mm (in)
Dry weight, kg (lb)
0.10-0.15 mm (0.0039-0.0059 in)
0.15-0.20 mm (0.0059-0.0079 in)
4-stroke engines oil
0.6 l (0.6 US gal. 0.5 Imp. gal.)
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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