Honda GS160

Honda GS160The Honda GS160 is a small 0.16 l (160 cc, 9.8 cu.in.) single-cylinder air-cooled 4-stroke internal combustion gasoline engine with horizontal shaft, manufactured by Honda Motor Company for general-purpose applications, such as pressure washers tillers and cultivators, agricultural equipment, water pumps.

The Honda GS160 engine has a single-cylinder with a cast-iron cylinder liner, compact combustion chamber, tough resin overhead cam for durability and quietness and uniblock construction reduce fuel consumption. The GS160 engine has transistorized magneto ignition, horizontal type carburetor with butterfly valve and recoil starter.

A 64 mm (2.5 in) cylinder bore and 50 mm (2.0 in) piston stroke give the engine a total of 160 cm3 of displacement. Compression ratio is 8.5:1. It produces 3.7 kW (5.0 HP) at 3,600 rpm and 10.3 N·m (1.05 kg·m, 7.6 ft·lb) of torque at 2,500 rpm.

General information

Engine Specifications
ModelGS160
Type4-stroke, OHС, single cylinder
Displacement160 cm 3 (9.8 cu-in)
Max. horsepower5.0 HP (3.7 kW) at 3,600 rpm
Max. torque (crank PTO)10.3 N·m (1.05 kg·m, 7.6 ft·lb) at 2,500 rpm
CarburetorHorizontal type, butterfly valve
Cooling systemForced-air
Ignition systemTransistorized magneto ignition
Lubricating systemSplash
Starting systemRecoil starter
Stoping systemIgnition primary circuit ground
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity2.0 l (0.53 US. Gal, 0.44 Imp. Gal.)
Fuel consumption230 g/HPh
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

GS160
Length, mm (in)337 (13.3)
Width, mm (in)369 (14.5)
Height, mm (in)343 (13.5)
Dry weight, kg (lb)13.6 (30.0)

Cylinder Block and Head

Cylinder block
Compression ratio:8.5:1
Bore x Stroke64 mm X 50 mm (2.5 x 2.0 in)
Sleeve internal diameter64.00 mm (2.52 in)
Piston skirt outer diameter63.969 mm (2.5185 in)
Number of piston rings (compression / oil):2 / 1
Ring side clearanceTop/second/oil0.015-0.045 mm (0.0006-0.0018 in)
Ring end gapTop0.20-0.35 mm (0.008-0.014 in)
Second0.30-0.45 mm (0.012-0.018 in)
Oil0.15-0.35 mm (0.006-0.014 in)
Ring widthTop/second1.5 mm (0.06 in)
Oil2.5 mm (0.10 in)
Connecting rod small end ID13.005 mm (0.512 in)
Connecting rod big end ID26.02 mm (1.024 in)
Crankpin outer diameter25.98 mm (1.023 in)
Main journal outer diameterPTO side27.993 mm (1.1021 in)
Flywheel side25.393 mm (0.9997 in)
Cylinder Head
Warpage (limit)0.10 mm (0.004 in)
Valve Arrangement:OHС
Valves:2
Stem outer diameter (standard):INTAKE5.480 mm (0.216 in)
EXHAUST5.44 mm (0.214 in)
Guide internal diameterINTAKE / EXHAUST5.5 mm (0.2165 in)
Spring free length34.0 mm (1.34 in)

Tightening torque specs

Tightening torque specs
Crankcase cover12 Nm; 1.2 kg·m; 8.6 ft·lb
Connecting rod bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Valve adjusting lock nut8 Nm; 0.8 kg·m; 5.8 ft·lb
Cylinder head cover bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Oil drain plug bolt24 Nm; 2.4 kg·m; 17 ft·lb
Flywheel nut75 Nm; 7.6 kg·m; 55 ft·lb
Governor arm nut10 Nm; 1.0 kg·m; 7 ft·lb
Muffler bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Recoil starter nut8.5 Nm; 0.85 kg·m; 6.1 ft·lb
Fan cover stud bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Spark plug20 Nm; 2.0 kg·m; 14 ft·lb

Service Information

Engine
Maximum speed3,850 ± 150 rpm
Idle speed1,400 ± 150 rpm
Cylinder compression5.0 kg/cm2 (71 psi) at 600 rpm
Valve clearance
Intake valve0.15 ± 0.04 (0.006 ± 0.002)
Exhaust valve0.20 ± 0.04 (0.008 ± 0.002)
Oil system
Oil typeHonda 4-stroke or an equivalent (SE or SF)
Recommended oilSAE 10W-30
Oil capacity0.58 l (0.61 US. qt, 0.55 Imp. qt.)
Ignition system
Spark plugNGK: BPR6ES
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
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 verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

1 Comment

  1. What is the diameter of the shaft?
    what is the height of the shaft from the mounting platform?
    Is is compatible replacement for a GX160?

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