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GX Series Commercial Grade
GX390
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The Next Generation of GX Engines
•More power.
•Quieter.
•Less fuel consumption.
•Less emissions.
•No modifications necessary for equipment currently set up for the previous GX series.

Features
•Honda OHV Commercial-grade engine
•Horizontal shaft
•Electronic ignition/Oil Alert
•EPA/CARB compliant
•3 Year Commercial Warranty

Applications: Lawn tractors, Pressure washers, Go-Karts, Trenchers, Agricultural equipment, Chipper/shredders, Air compressors, Concrete saws, Variety of construction equipment

 

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 Recoil Starter
Carburetor Butterfly
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 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) 16.0" (407 mm) x 18.1" (459 mm) x 17.7" (449 mm)
Dry Weight 69 lbs (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.

Performance Curve