GX390

Honda takes pride in presenting a product that is eco-friendly and industrious. The durable and high performer- GX390 Engine is all this much and more. This easy to use and maintenance machine is suitable for heavy-duty jobs due to its tough parts and built. Also, it is quite notable for its efficient fuel economy, easy starting and performance.

Download Specifications

FUEL EFFICIENT, HIGH OUTPUT OPERATION
• Digital CDI ignition system with variable timing Learn More
• Increased compression ratio
• 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
• Reduced mechanical noise due to piston design
• Forged steel crankshaft and rigid crankcase
• Helical cut gears
• Sophisticated air intake system

PROVEN RELIABILITY
• Oil Alert Learn More
• 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 tanks
• Large automotive type fuel cap
• Dual oil drains and fill
• Easy, convenient, heavy duty control box
• Easily accessible spark plug

EASY STARTING
• Heavy duty recoil starter
• Automatic mechanical de-compression system Learn More
• Variable ignition timing
EMISSIONS COMPLIANT
• EPA certified
• No catalyst necessary

AVAILABLE OPTIONS
• Low profile versions
• Gear reduction options
• Electic start
• Spark arrester available
• Charge and lamp coils with multiple output options available
• Cyclone Air Cleaner available
• Cyclone Air Cleaner available (Select models)

Model GX390
Engine Type Air-cooled 4-stroke OHV
Bore & 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)

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