Honda Horizontal Engine 11.7 Net HP 389cc 12V ES 3 Amp 1" x 3-31/64" #GX390-QAE2

HondaSKU: GX390-QAE2

Sale price$1,025.00
Only 2 units left


The Next Generation of GX Engines
More power.
Less fuel consumption.
Less emissions.
No modifications necessary for equipment currently set up for the previous GX series.
11.7 Net HP Formerly Rated 13 HP
12 volt electric start, 3 amp alternator
1" x 3-31/64" keyed shaft, tapped 7/16".
OHV, low oil shutdown protection, heavy duty industrial engine
3 year warranty.
Universal bolt pattern for easy repowering.
Model GX390-QAE2.
82 lbs
Not available for sale in California
Engine Type
Air-cooled 4-stroke OHV
Bore x Stroke
88 X 64 mm
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
Lamp/Charge coil options
25W, 50W / 1A, 3A, 10A, 18A
Butterfly Float Type
Ignition System
Digital CDI with variable timing
Starting System
Lubrication System
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)
Unleaded 86 octane or higher
Dry Weight
69 lb (31.5 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.
Honda GX Series Engines The Next Generation
In 1983, Honda Motor Company developed a revolutionary new 4-stroke, overhead valve engine that defined the future of small engine technology.
Now, almost 27 years later, Honda introduces the next generation of GX engines by offering more power, more quiet, less fuel consumption and less emissions than ever before. All this in a configuration that doesnt require modifications to equipment currently set up for the current GX Series.

More Power

The new Honda GX Series engines offer up to 6% more power over the original models. The increase in power is achieved through several innovative improvements.

  • The new GX series now employs a digital CDI ignition system to dramatically improve ignition timing.
  • The compression ratio has been increased
  • Combustion air flow has been enhanced through a more efficient air cleaner design that reduces air flow restriction.

Less Noise

Youll enjoy noise reduction levels ranging from 2.5 to 8db thanks to Hondas re-designed air cleaner and muffler. Vibration levels have also been reduced through the use of an all new, light weight piston.

Less Fuel

Fuel consumption has been reduced by 10% through dramatically improved combustion efficiency. The new GX series offers:

  • Improved ignition timing
  • Smaller inlet port and
  • Increased compression ratio.

This means longer runs times and lower fuel costs for Honda owners.

Same Footprint

OEMs can pass along new improvements and features without having to worry about costly and time consuming product modifications. New GX Series models have the exact footprint and fit into the same envelope as their similarly sized predecessors.

EPA Phase 3 Ready!

Once again, Honda leads the way in offering power solutions that meet EPA Phase 3 emission regulations well ahead of schedule.

Even more importantly, Honda GX engines meet these regulations without the need for a catalyst.

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