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Honda Engines GX390

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Availability
Brochure
Manufacturer
Honda Engines
Model
GX390

Overview

Description

The Next Generation of GX Engines.



With the GX340, you're looking at one of the best engines in the business. 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
  • Generators
  • Tillers / cultivators
  • Forestry equipment
  • Construction / industrial equipment
  • Agricultural equipment
  • Small vehicles
  • Water pumps
Fuel Efficient, High Output Operation
  • Digital CDI ignition system with variable timing
  • Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficency
  • Increased compression ratio
  • 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
  • Reduced mechanical noise due to piston design
  • Helical cut gears
  • Sophisticated air intake system
Proven Reliability
  • Oil Alert
  • Dual element air cleaner
  • Cast iron cylinder sleeve
  • High quality materials, fit, and finish
  • Fuel Valve
  • 3-Year Limited Warranty
Easy to Use and Maintain
  • Simple throttle control
  • Large fuel tanks
  • Dual oil drains and fill
  • Large automotive type fuel cap
  • Easy, convenient, heavy duty control box
  • Easily accessible spark plug
Easy Starting
  • Heavy duty recoil starter
  • Automatic mechanical de-compression system
  • Variable ignition timing
Emissions Compliant
  • CARB and EPA certified
  • No catalyst necessary
Available Options
  • Low profile versions
  • Gear reduction options
  • Spark arrester available
  • Electic start
  • Charge and lamp coils with multiple output options available
  • Cyclone Air Cleaner available
Specifications
  • 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 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)
Dimensions
  • Length (min): 16.0" (407 mm)
  • Width (min): 19.1" (485 mm)
  • Height (min): 17.7" (449 mm)
PTO
  • E type: Tapered shaft
  • H type: Reduction type PTO
  • L type: Reduction type PTO
  • P type: Threaded type (SAE)
  • Q type: Straight shaft
  • R type: Reduction type PTO
  • V type: Tapered shaft

Specs

Engine

Engine Type
Air-cooled 4-stroke OHV
Bore x Stroke
88 x 64 mm
Displacement
389 cm3
Compression Ratio
8.2:1
Horsepower
11.7 hp (8.7 kW) @ 3,600 rpm
Torque
19.5 lb.-ft (26.4 Nm) @ 2,500 rpm
Fuel Capacity
6.4 U.S. qt. (6.1 L)
Starting System
Recoil/electric

Dimensions

Length
16.0 in. (407 mm)
Width
19.1 in. (485 mm)
Height
17.7 in. (449 mm)
Weight
69 lb. (31.5 kg)

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