Powerful. Reliable. Durable.
With the GX390, you’re looking at some of the best engines in the business. Powerful, Reliable, Durable, and Quiet. Honda’s GX Series is power you can trust, and then some.
Engine Type Air-cooled 4-stroke OHV
Bore x Stroke 88 X 64 mm
Displacement 389 cm3
Net Power Output* 11.7 hp (8.7 kW) @ 3,600 rpm
Net Torque 19.5 lb-ft (26.5 Nm) @ 2,500 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Compression Ratio 8.2:1
Lamp/Charge coil options 25W, 50W / 1A, 3A, 10A, 18A
Carburetor Butterfly Float Type
Ignition System Digital CDI with variable timing
Starting System Recoil/electric
Lubrication System Splash
Governor System Centrifugal Mass Type
Air Cleaner Dual element
Oil Capacity 1.16 US qt (1.1 L)
Fuel Tank Capacity 6.4 U.S. qts (6.1 liters)
Fuel Unleaded 86 octane or higher
Dry Weight 69 lb (31.5 kg)