2025 Honda GX120UTQX6 ENGINE

GX120 Horizontal Crankshaft

Ready for almost anything, the GX120 offers low noise levels and emissions – along with plenty of power and reliability to boot.

Common Applications

• Agricultural equipment
• Commercial lawn and garden equipment
• Construction/industrial equipment
• Forestry equipment
• Generators
• Pressure washers
• Tillers/cultivators
• Water pumps

FEATURES

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

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

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
• Automatic mechanical decompression system  

Emissions Compliant

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

Available Options

• Gear reduction options
• Spark arrester available

SPECIFICATIONS

• Engine Type Air-cooled 4-stroke OHV
• Bore x Stroke 60 mm x 43.5 mm
• Displacement 122 cm³
• Net Power Output* 3.2 HP (2.4 kW) @ 3,600 rpm
• Net Torque 5.5 lb-ft (7.3 Nm) @ 2,500 rpm
• PTO Shaft Rotation Counterclockwise (from PTO shaft side)
• Compression Ratio 8.3:1
• Fuel Tank Capacity 2.0 litres (2.1 U.S. qts)
• Lamp/Charge coil options 25W, 50W
• Carburetor Butterfly
• Ignition System Transistorized magneto
• Starting System Recoil
• Lubrication System Splash
• Governor System Mechanical
• Air Cleaner Dual element
• Oil Capacity 0.56 litres (0.59 U.S. qts)
• Fuel unleaded 86 octane or higher
• Dry Weight 13.2 kg (29 lbs.)