Background and Identification
The Honda General Purpose Motor model GX120UT2 is an air-cooled, four-stroke, overhead-valve engine. It can be used for pressure washers, commercial lawn and garden equipment, tillers and cultivators, generators, construction and industrial equipment, agricultural equipment, small vehicles, and water pumps, among other applications. Without fuel or oil, this engine weighs 29 pounds.
The model GX120UT2 displaces 118 cubic centimeters (cc) and produces a net power output of 3.5-horsepower at a speed of 3,600 revolutions per minute. The GX120UT2 model’s larger sibling, the GX270UT2, produces 8.5-horsepower at 3,600 revolutions per minute. The engine produces a net torque of 5.4 foot-pounds at 2,500 revolutions per minute. It can hold up to 2.1 U.S. quarts (2.1 liters) of gasoline and 0.59 U.S. quarts (0.56 liters) of engine oil. Honda recommends using unleaded 86 octane or higher fuel for this engine.
The GX120UT2 model was sold in five different shaft configurations, the L-type (reduction-type PTO), Q-type (straight-shaft), S-type (metric straight-shaft), T-type (straight-shaft), and AR-type (rammer).
The Honda General Purpose Motor model GX120UT2 can be identified by its red engine cover, a white fuel tank, and a mechanical box with a black cover. The name “Honda” is printed in white font on the side of the engine cover along with the model “GX” in red font and “120” in black font with a white border.
Engine Type: Air-cooled 4-stroke OHV
Bore x Stroke: 60 X 42 mm
Displacement: 118 cm3
Net Power Output: 3.5 HP (2.6 kW) @ 3,600 rpm
Net Torque: 5.4 lb-ft (7.3 Nm) @ 2,500 rpm
PTO Shaft Rotation: Counterclockwise (from PTO shaft side)
Compression Ratio: 8.5:1
Lamp/Charge coil options: 25W, 50W
Ignition System: Transistorized magneto
Starting System: Recoil
Lubrication System: Splash
Governor System: Mechanical
Air cleaner: Dual Element
Oil Capacity: 0.59 US qt. (0.56 L)
Fuel Tank Capacity: 2.1 U.S. qts (2.0 liters)
Fuel: Unleaded 86 octane or higher
Dry Weight: 29 lbs. (13.0 kg)