Honda G20

Honda G20The Honda G20 is a 132 cc (8.05 cu.in.) single-cylinder air-coolled 4-stroke internal combustion small gasoline engine manufactured by Honda Motor Company since 1963 for general-purpose applications.

The G20 has a slide valve (L-head) design and an efficient combustion chamber designs together with a high-performance carburetor. Friction components such as the cylinder sleeve and piston are made of high strength materials.

The G20 produced 2.0 PS (1.47 kW) at 3400 rpm of continuous rated horsepower and 3.0 PS (2.2 kW) of maximum horsepower.

General information

Engine Specifications
ModelG20 / GR20
Type4-stroke, single cylinder, side-valve
Displacement132 cm 3 (8.05 cu-in)
Max. horsepower3.0 PS (2.2 kW)
Max. torque
CarburetorHorizontal, butterfly valve
Cooling systemForced-air
Ignition systemHigh voltage ignition
Lubricating systemSplash system
Starting systemRecoil starter
Stoping systemGround switch
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity4.5 L
PTO shaft rotationCounterclockwise (from PTO shaft side)

Maintenance data

Oil system
Oil typeHonda 4-stroke or an equivalent
Recommended oilSAE 20 or 30
Oil capacity0.57 l
Ignition system
Spark plugNGK: C-6HB
Spark plug gap0.6-0.7 mm (0.024-0.028 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.

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