Honda G45

Honda G45The Honda G45 is a 240 cc (16.6 single-cylinder air-coolled 4-stroke internal combustion small gasoline engine manufactured by Honda Motor Company since 1964 for general-purpose applications.

The Honda G45 engine has a recoil starter, horizontal carburetor with butterfly valve and high voltage ignition. Cylinder bore and piston stroke are 72.0 mm (2.83 in) and 59.0 mm (3.32 in), respectively.

The G45 produced 4.5 PS (3.31 kW) at 3400 rpm of continuous rated horsepower and 6.0 PS (4.4 kW) at 4000 rpm of maximum horsepower.

General information

Engine Specifications
Type4-stroke, single cylinder
Displacement240 cm 3 (16.6 cu-in)
Max. horsepower6.0 PS (4.4 kW) at 4000 rpm
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 capacity6.0 L
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Length, mm (in)374 (14.72)
Width, mm (in)323 (12.71)
Height, mm (in)450 (17.71)
Dry weight, kg (lb)23.0 (50.7)

Maintenance data

Cylinder compression5.3 kg/cm2 (75 psi)
Tappet clearance0.05-0.10 (0.002-0.004 in)
Oil system
Oil typeHonda 4-stroke or an equivalent
Recommended oilSAE 10W-30
Oil capacity0.75 L
Ignition system
Spark plugNGK: B7-H
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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