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GX120 - Manufacturer: Honda

Quality and performance come standard.

Completely redesigned for 2011, the new GX120 offers lower noise levels, lower vibration, and lower emissions - without sacrificing power output or performance. And the new GX120 essentially matches the dimensions of the previous model, so no modifications to existing equipment designs are necessary.

  • Commercial lawn and garden equipment
  • Tillers / cultivators
  • Generators
  • Construction / industrial equipment
  • Agricultural equipment
  • Water pumps
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Engine TypeAir-cooled 4-stroke OHV
Bore x Stroke60 X 42 mm
Displacement118 cm3
Net Power Output*3.5 HP (2.6 kW) @ 3,600 rpm
Net Torque5.4 lb-ft (7.3 Nm) @ 2,500 rpm
PTO Shaft RotationCounterclockwise (from PTO shaft side)
Compression Ratio8.5:1
Lamp/Charge coil options25W, 50W
Ignition SystemTransistorized magneto
Starting SystemRecoil
Lubrication SystemSplash
Governor SystemMechanical
Air cleanerDual Element
Oil Capacity0.59 US qt. (0.56 L)
Fuel Tank Capacity2.1 U.S. qts (2.0 liters)
FuelUnleaded 86 octane or higher
Dry Weight29 lbs. (13.0 kg)


Length (min)11.7" (297 mm)
Width (min)13.6" (346 mm)
Height (min)13.0" (329 mm)

Pto Shaft Options

L typeReduction type PTO
Q typeStraight shaft
S typeStraight shaft (metric)
T typeStraight shaft
AR typeRammer

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

Exceptionally Quiet

  • Even quieter than previous model!
  • 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
  • New carburetor chamber coating and carburetor filter help to protect against fuel impurities
  • 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

  • Simple throttle control
  • Large fuel tanks
  • Large automotive type fuel cap
  • Dual oil drains and fill
  • Easy, convenient, heavy duty control box
  • Easily accessible spark plug

Easy Starting

  • Heavy duty recoil starter
  • Ergonomic, easy to grip recoil rope design
  • Automatic mechanical de-compression system

Emissions Compliant

  • Lower emissions, same power output!
  • CARB and EPA certified
  • No catalyst necessary

Available Options

  • Gear reduction options
  • Spark arrester available

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