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GX 340 (Vertical Crankshaft)

Quality and performance come standard.
Professionals rely on the GXV390 to deliver reliable and easy-starting, along with fuel-efficient performance, day in and day out

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Common Applications

  • Commercial lawn and garden equipment
  • Tractors
  • Construction/industrial equipment
  • Agricultural equipment
  • Small vehicles



Fuel Efficient, High-Output Operation

  • Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficiency
  • OHV design for increased efficiency and optimal power transfer
  • High compression ratio for better fuel efficiency

Smooth Performance

  • Precision-engineered components result in lower vibration
  • Ball bearing supported crankshaft for greater stability
  • Dual balancer shafts

Exceptionally Quiet

  • Large capacity, multi-chamber exhaust system
  • Reduced mechanical noise due to light weight, noise-reducing materials
  • Forged steel crankshaft and rigid crankcase
  • Helical cut gears
  • Sophisticated air intake system

Proven reliability

  • Oil Alert
  • Cast iron cylinder sleeve
  • High-quality materials, fit, and finish
  • Dual element air cleaner
  • Fuel Valve
  • 3-Year Limited Warranty

Easy to use and maintain

  • Large fuel tanks
  • 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

Emissions compliant

  • CARB and EPA certified
  • No catalyst necessary

Available options

  • Gear reduction options
  • Electric start
  • Spark arrester available
  • Charge and lamp coils with multiple output options available


Engine Type Air-cooled 4-stroke OHV
Bore x Stroke 82 mm x 64 mm
Displacement 337 cm3
Net Power Output* 8.9 HP (6.6 kW) @ 3,600 rpm
Net Torque 15.9 lb-ft (21.6 Nm) @ 2,500 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Compression Ratio 7.7:1
Fuel Tank Capacity 2.1 litres (2.2 U.S. qts)
Lamp/Charge Coil Options 1A, 3A, 10A
Carburetor Float type
Ignition System Transistorized magneto
Starting System Recoil/electric
Lubrication System Pressure and splash
Governor System Centrifugal mechanical
Air Cleaner Dual element
Oil Capacity 1.1 litres (1.2 U.S. qts)
Fuel Unleaded 86 octane or higher
Dry Weight 32.3 kg (71.2 lbs)



Length (min): 433 mm (17.0″)
Width (min): 382 mm (15.0″)
Height (min): 406 mm (15.9″)

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