Honda G20

Honda G20 engineThe Honda G20 is an 132 cc, 8.1 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Honda Motor Company since 1963 for general-purpose applications.

The Honda G20 engine has a single-cylinder, L-head design with two valves, and a heavy-duty recoil starter. This engine used horizontal type carburetor with a butterfly valve, high voltage ignition system, splash type lubricating system, and forced-air cooling system. The G20 is equipped with a 4.5 L fuel tank.

The Honda G20 engine produced 3.0 PS (2.2 kW; 3.0 HP) of peak output power and 2.0 PS (1.47 kW) at 3400 rpm of continuous rated power.

General information

Engine Specifications
Engine modelG20
Engine type4-stroke, L-head, single-cylinder
Displacement132 cm3, (8.1 cu·in)
Max. horsepower3.0 PS (2.2 kW; 3.0 HP)
Max. torque
Cooling systemForced air
Lubricating systemSplash type
Ignition systemHigh voltage ignition
Fuel systemHorizontal type carburetor with butterfly valve
Fuel tank capacity4.5 L (1.19 US. gal. 0.99 Imp. gal.)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Starting systemRecoil starter
Stoping systemIgnition primary circuit ground
PTO shaft rotationCounterclockwise (from PTO shaft side)

Service Data

Oil system
Lubrication system:Splash type
Oil type:SAE 20 or 30
Recommended oil:Honda 4-stroke or an equivalent
Oil capacity:0.57 L (0.6 US. qt, 0.5 Imp. qt.)
Fuel system
Type:Horizontal type carburetor with butterfly valve
Ignition system
Type:High voltage ignition
Spark plug:NGK C-6HB
Spark plug gap:0.6-0.7 mm (0.0236-0.0276 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 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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