With the GX390, you’re look for More power. Quieter performance. Lower fuel consumption.

Lower emissions. Better features. Exceptional performance. Honda’s GX series lives up to the legend, and then some.

Common Applications

• Pressure washers

• Commercial lawn and garden equipment

• Tillers / cultivators

• Generators

• Forestry equipment

• Construction / industrial equipment

• Agricultural equipment

• Small vehicles

• Water pumps

• Fuel Efficient, High Output Operation

• Digital CDI ignition system with variable timing

• Increased compression ratio | Learn More

• Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficency

• OHV design for increased efficiency and optimal power transfer

• Smooth Performance

• Precision engineered components result in lower vibration

• Ball bearing supported crankshaft for greater stability

• Heavy duty balancer shaft

• Improved piston design

• Exceptionally Quiet

• Large capacity, multi-chamber exhaust system

• Improved camshaft and muffler reduce overall engine noise by up to 5 dB

• Forged steel crankshaft and rigid crankcase

• Helical cut gears

• Sophisticated air intake system

• Proven Reliability

• Oil Alert

• Cast iron cylinder sleeve

• High quality materials, fit, and finish

• Dual element air cleaner

• Fuel Valve

• 3-Year Limited Warranty

• Easy to Use and Maintain

• Simple throttle control\

• Large fuel tank

• Large automotive type fuel cap

• Dual oil drains and fill

• Easy, convenient, heavy duty control box

• Easily accessible spark plug

• Heavy duty recoil starter

• Automatic mechanical de-compression system | Learn More

• Variable ignition timing

• CARB and EPA certified

• No catalyst necessary

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 (26.4 Nm) @ 2,500 rpm

PTO Shaft Rotationa: Counterclockwise (from PTO shaft side)
Compression Ratio: 8.2:1
Carburetor: Butterfly Float Type
Ignition System: Digital CDI with variable timing 
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

Please contact us if you have any questions about the products. We also provide good discount on higher volume. Wholesale are welcome.

Thanks for checking out our products and we look forward to serving you for many years to come.