Petrol Engine Honda GX390

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The GX390 engine is suitable for a wide range of heavy-duty applications such as construction equipment, tillers, generators, welders, pumps and other industrial applications.

• The OHV design enhances combustion efficiency
• A variable ignition timing (digital CDI) results in high power output, reduced fuel consumption and  excellent exhaust emissions performance.
• Easy starting with an automatic decompression system and an easy-to-grip soft recoil starter handle
• High quality materials and purpose-built components ensure reliable long-term use
• Meets world’s most stringent environmental legislation
• Guaranteed low fuel and oil consumption
• Reduced vibration and noise level

Engine Type

4-stroke single cylinder
OHV petrol engine
25° inclined cylinder
horizontal shaft

Cylinder Sleeve Type

Cast iron sleeve

Bore x Stroke

88 x 64 mm


389 cm³

Compression Ratio

8.2 : 1

Net Power

8.7 kW ( 11.7 HP ) / 3600 rpm

Cont. Rated Power

6.4 kW ( 8.6 HP ) / 3000 rpm
7.0 kW ( 9.4 HP ) / 3600 rpm

Max. Net Torque

26.5 Nm ( 2.7 kgfm ) / 2500 rpm

Ignition System

Digital CDI with variable ignition timing


Recoil (el. start optional)

Fuel Tank Capacity

6.1 Liter

Fuel Cons. at Cont. Rated Power

3.5 L/h – 3600 rpm

Engine Oil Capacity

1.1 Liter

Dimensions (L x W x H)

406 x 460 x 448 mm

Dry Weight

31.7 kg

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