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GX Series Commercial Grade
iGX390

Honda takes intelligence to a whole new level.

Click here for features of the iGX.

Technologically Advanced.

iGX engines feature an integrated ECU (electronic control unit) with a self-tuning regulator (STR) governor system. This allows the engine to communicate with the machine it is powering.

  • Operation is automated
  • Control becomes surer, faster and easier.
  • Enables drive-by-wire remote control operation of the engine, regulating functions such as starting, throttle, ignition timing and diagnostics.
  • Engine speed can be programmed and varied based on the equipment application's load and speed requirement.
  • Easier for inexperienced users to operate
  • Easily maintained - Ideal for rental applications
  • Same legendary durability, quality, and reliability as our GX engines

More Thoughtful iGX Design Features

  • Full auto choke
  • Automatic shut-off fuel valve (iGX440 only)
  • Digital ignition system
  • Long-life oil-immersed timing belt (iGX440 only)
  • Efficient muffler
  • New long-life air filter
  • Low effort recoil starter with automatic decompression
  • Automotive style starter motor
  • Multifunction oil alert
  • Wide fuel filler mouth with ratchet-type fuel filler cap

Possible applications include:

  • Pressure washers that prolong pump life by automatically idling up or down when the user squeezes or releases the trigger handle
  • Utility vehicles with smooth drivability and true "turnkey" operation using drive-by-wire and auto-choke features
  • Water pumps that can be automatically activated based on water level by remote switch
  • Lawn tractors that can automatically vary engine speed based on load so the engine does not slow in thick grass
  • Generators/Welders that deliver consistent, steady frequency output and can auto-idle without an external solenoid
 

View Specifications
View Performance Curve

Specifications  
Engine Type Air-cooled, 4-Stroke, OHV, single cylinder
Bore x Stroke 3.5" x 2.5" (88 x 64 mm)
Displacement 24 cu in (389 cm3)
Compression Ratio 8.2 : 1 
Net power (kW/rpm)* 11.7 hp (8.7 kW)
Net Torque* 19.5 lbs ft (26.4 Nm)
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Ignition System Digital CDI with variable ignition timing
Starting System Electric Starter
Carburetor Float type - Horizontal Butterfly
Lubrication System Splash
Governor System Electric STR (Self Tuning)
Air Cleaner Dual Element 
Oil Capacity 1.16 US qt (1.1 L)
Fuel Tank Capacity  6.4 US qt (6.1 L)
Evaporative Emissions Low permeation hose and purge joint provided
Exhaust Emissions Certified for use in all 50 states
Dimensions (L x W x H) Q-Shaft 16.0" (407 mm) x 19.1" (485 mm) x 17.7" (449 mm)
Dry Weight 82 lbs (37.0 kg)

* The power rating of the engine indicated in this document is the net power output tested on a production engine for the engine model and measured in accordance with SAE J1349 at 3,600 rpm (net power) and at 2,500 rpm (Max net torque). Mass production engines may vary from this value. Actual power output for the engine installed in the final machine will vary depending on numerous factors, including the operating speed of the engine in application, environmental conditions, maintenance, and other variables.

Performance Curve