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
Model G45
Type 4-stroke, single cylinder
Displacement 240 cm 3 (16.6 cu-in)
Max. horsepower 6.0 PS (4.4 kW) at 4000 rpm
Max. torque
Carburetor Horizontal, butterfly valve
Cooling system Forced-air
Ignition system High voltage ignition
Lubricating system Splash system
Starting system Recoil starter
Stoping system Ground switch
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity 6.0 L
PTO shaft rotation Counterclockwise (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 compression 5.3 kg/cm2 (75 psi)
Tappet clearance 0.05-0.10 (0.002-0.004 in)
Oil system
Oil type Honda 4-stroke or an equivalent
Recommended oil SAE 10W-30
Oil capacity 0.75 L
Ignition system
Spark plug NGK: B7-H
Spark plug gap 0.6-0.7 mm (0.024-0.028 in)
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