Honda’s GX series engines are legendary for superior reliability and performance. And there’s no doubt about it: the GX120 lives up to the legend. Lower noise levels, lower vibration, and lower emissions – without sacrificing power output or performance.

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
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!
No catalyst necessary

SPECIFICATIONS

Manufacturer's Warranty	3 year limited warranty
Engine Type	GX series OHV commercial-duty
Shaft Diameter	1 (Gear Reduction Output 3/4")
Shaft Length (in)	3-15/64
Net Power Output (HP)	11.7 (8.7 kW) at 3,600 RPM
Net Torque (lbs/ft)	19.5 (26.4 Nm) at 2,500 RPM
Shaft Output	Horizontal
Crankshaft	H type
Bore x Stroke	3.5 x 2.5 in
Displacement	389
PTO Shaft Rotation	Counterclockwise (from PTO shaft side)
Gear Reduction	H type 6:1
PTO Height	5-1/4
Cylinders (qty)	1
Cylinder Bore	Cast iron
Compression Ratio	8.2:1
Cooling System	Air Cooled
Low Oil Alert	Yes
Low Oil Shutdown	Yes
Carburetor	Float, external vent
Ignition System	Electronic
Starting System	Recoil
Lubrication System	Forced Splash
Governor System	Centrifugal mechanical
Air Cleaner	Dual Element
Oil Capacity (qt)	1.16
Fuel Tank	Standard (White)
Fuel Tank Capacity (qt)	6.4
Fuel Type	Gasoline
Fuel Filter	Fuel tank filler neck strainer
Throttle Control	Manual
Choke Control	Manual
Max RPM	3,600
Muffler Included	Standard, exhaust pipe protector, spark arrestor, deflector
Auto Compression Release	Yes
CARB Approval	No
Bolt Circle (in)	5, 6-1/2
Mounting Base L x W (in)	7-11/16 x 3-25/64 - 4-1/16
Dimensions L x W x H (in)	15-7/8 x 17-11/16 x 17-3/8
Ship Weight	95 lbs