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Honda GX390 13 HP Engine
Honda GX390 13 HP Engine
Honda GX390 13 HP Engine
Honda GX390 13 HP Engine
Honda GX390 13 HP Engine
Honda GX390 13 HP Engine
Honda GX390 13 HP Engine

Honda GX390 13 HP Engine

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Quality and Performance Come Standard

The GX390 offers all of the power, comfort, and efficiency you’ve come to expect from Honda – along with several new features to further enhance your experience. It’s no wonder why the GX Series is the go-to when performance counts. Experience loads of power, impressive durability and exceptional fuel consumption with the GX390 – a great engine choice for water pumps, pressure washers, small vehicles and more.

Common Applications

  • Agricultural equipment
  • Commercial lawn and garden equipment
  • Construction/industrial equipment
  • Forestry equipment
  • Generators
  • Pressure washers
  • Small vehicles
  • Tillers/cultivators
  • Water pumps


Fuel-Efficient, High-Output Operation

  • Variable timing digital CDI ignition
  • Increased compression ratio
  • Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficiency
  • 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 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 decompression system
  • Variable ignition timing.

Emissions Compliant

  • CARB and EPA certified
  • No catalyst necessary.

Available Options

  • Low profile versions
  • Gear reduction options
  • Electric start
  • Spark arrester available
  • Charge and lamp coils with multiple output options available
  • Cyclone Air Cleaner available


  • Engine Type - Air-cooled 4-stroke OHV
  • Bore x Stroke - 88 mm x 64 mm
  • Displacement - 389 cm^3
  • 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 Rotation - Counterclockwise (from PTO shaft side)
  • Compression Ratio - 8.5:1
  • Fuel Tank Capacity - 6.1 litres (6.4 U.S. qts)
  • Lamp/Charge coil options - 25W, 50W / 1A, 3A, 10A, 18A
  • Carburetor - Butterfly Float Type
  • Ignition System - Digital CDI with variable ignition timing
  • Starting System - Recoil/electric
  • Lubrication System - Splash
  • Governor System - Centrifugal mass type
  • Air Cleaner - Dual element
  • Oil Capacity - 1.1 litres (1.16 U.S. qts)
  • Fuel - Unleaded 86 octane or higher
  • Dry Weight - 31.5 kg (69 lbs)


We're here to make your experience smooth and satisfying. Looking for a shipping quote? Just reach out to us, and we'll offer you a special rate that's made just for you.

We're excited to ship to all States and Provinces across North America. With our careful pre-inspection, rapid delivery times and commitment to quality, we ensure your order arrives safely and swiftly. At HOC, we go above and beyond to meet your needs. Your happiness is our guarantee. Contact us for a shipping quote tailored to you, and we'll handle everything else.


At HOC, we meticulously select our dealers from a pool of globally renowned entities, ensuring that we offer only the best to you. Our commitment to excellence is further reflected in our offering of the most Comprehensive Warranty Periods among equipment dealers across North America.

This approach allows you to make your selection with a sense of confidence and assurance, knowing well that your purchase is under the protection of a warranty that's as steadfast and dependable as the product itself. We invite you to experience the peace of mind and trust that come with choosing HOC, where your satisfaction and security are our topmost priorities.

To view the specific warranty period applicable to this product, and to delve into the details of your protection, please click the link below.

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Honda GX390 13 HP Engine

Honda GX390 13 HP Engine