GX340/390

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GX340/390

Powerful. Reliable. Durable.

With the GX340 and 390, you’re looking at some of the best engines in the business. Powerful, Reliable, Durable, and Quiet. Honda’s GX Series is power you can trust, and then some.

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

SPECIFICATIONS

GX340

GX390

Engine Type Air-cooled 4-stroke OHV Air-cooled 4-stroke OHV
Bore x Stroke 88 X 64 mm 88 X 64 mm
Displacement 389 cm3 389 cm3
Net Power Output* 10.7 hp (8.0 kW) @ 3,600 rpm 11.7 hp (8.7 kW) @ 3,600 rpm
Net Torque 19.5 lb-ft (26.4 Nm) @ 2,500 rpm 19.5 lb-ft (26.5 Nm) @ 2,500 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side) Counterclockwise (from PTO shaft side)
Compression Ratio 8.2:1 8.2:1
Lamp/Charge coil options 25W, 50W / 1A, 3A, 10A, 18A 25W, 50W / 1A, 3A, 10A, 18A
Carburetor Butterfly Float Type Butterfly Float Type
Ignition System Digital CDI with variable timing Digital CDI with variable timing
Starting System Recoil/electric Recoil/electric
Lubrication System Splash Splash
Governor System Centrifugal Mass Type Centrifugal Mass Type
Air Cleaner Dual element Dual element
Oil Capacity 1.16 US qt (1.1 L) 1.16 US qt (1.1 L)
Fuel Tank Capacity 6.4 U.S. qts (6.1 liters) 6.4 U.S. qts (6.1 liters)
Fuel Unleaded 86 octane or higher Unleaded 86 octane or higher
Dry Weight 69 lb (31.5 kg) 69 lb (31.5 kg)

WARNING: California Prop 65 Info

DIMENSIONS

GX340

GX390

Length (min) 16.0″ (407 mm) 16.0″ (407 mm)
Width (min) 19.1″ (485 mm) 19.1″ (485 mm)
Height (min) 17.7″ (449 mm) 17.7″ (449 mm)

PTO

GX340

GX390

E type Tapered shaft View Details Tapered shaft View Details
H type Reduction type PTO View Details Reduction type PTO View Details
L type Reduction type PTO View Details Reduction type PTO View Details
P type Threaded type (SAE) View Details Threaded type (SAE) View Details
Q type Straight shaft View Details Straight shaft View Details
R type Reduction type PTO View Details Reduction type PTO View Details
V type Tapered shaft View Details Tapered shaft View Details