The Honda GX140 is a 0.14 l (144 cc) single-cylinder air-cooled 4-stroke internal combustion small gasoline engine manufactured by Honda Motor Company since 1983 for general-purpose applications.
This engine has a single cylinder inclined by 25° overhead valve design for increased efficiency and optimal power transfer, sophisticated air intake system, large capacity, multi-chamber exhaust system, heavy-duty recoil starter.
A 64.0 mm (2.5 in) cylinder bore and 45.0 mm (1.77 in) piston stroke give the engine a total of 144 cc of displacement. It produces 3.6 kW (5.0 PS) at 4,000 rpm and 9.8 N·m (1.0 kg·m, 7.7 ft·lb) of torque at 2,800 rpm.
|Type||4-stroke, OHV, single cylinder, inclined by 25°|
|Displacement||144 cm 3 (8.78 cu-in)|
|Max. horsepower||5.0 PS (3.6 kW) at 4000 rpm|
|Max. torque (crank PTO)||9.8 N·m (1.0 kg·m, 7.7 ft·lb) at 2800 rpm|
|Carburetor||Horizontal type, butterfly valve|
|Ignition system||Transistorized magneto ignition|
|Starting system||Recoil starter|
|Stoping system||Ignition primary circuit ground|
|Fuel used||Unleaded gasoline (octane number 86 or higher)|
|Fuel tank capacity||3.6 l (0.95 US. Gal, 0.79 Imp. Gal.)|
|Fuel consumption||230 g/HPh|
|PTO shaft rotation||Counterclockwise (from PTO shaft side)|
Dimensions and Weight
|Length, mm (in)||315 (12.4)|
|Width, mm (in)||355 (14.4)|
|Height, mm (in)||335 (13.2)|
|Dry weight, kg (lb)||14.0 (30.9)|
Cylinder Block and Head
The Honda GX140 has cast iron cylinder sleeve, ball bearing supported crankshaft, improved piston design, heavy-duty balancer shaft.
|Bore x Stroke||64 mm X 45 mm (2.5 x 1.77 in)|
|Sleeve internal diameter||64.00 mm (2.5196 in)|
|Piston skirt outer diameter||63.985 mm (2.5190 in)|
|Number of piston rings (compression / oil):||2 / 1|
|Warpage (limit)||0.10 mm (0.004 in)|
|Maximum speed||4000 ± 150 rpm|
|Idle speed||1400 ± 150 rpm|
|Cylinder compression||6.0-8.5 kg/cm2 (85-151 psi) at 600 rpm|
|Oil type||Honda 4-stroke or an equivalent (SE or SF)|
|Recommended oil||SAE 10W-30|
|Oil capacity||0.6 P (0.63 US. qt, 0.53 Imp. qt.)|
|Spark plug||NGK: BPR6ES
|Spark plug gap||0.7-0.8 mm (0.028-0.031 in)|
- Pressure washers
- Commercial lawn and garden equipment
- Tillers / cultivators
- Construction / industrial equipment
- Agricultural equipment
- Small vehicles
- Water pumps
We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.
what is the engine output shaft size of the handa GX140 5 Hp Honda motor
Do you mean the length of the shaft or the width? as I could go check
I have an older Honda GX140 5 hp with a “roughly” 3/4″ 14 tooth splined shaft. I need to couple this engine with a hydraulic pump. Any help?
I have a plate compactor with this engine. The engine has no compression, and I’d like to replace it with a new equivalent. Any suggestions for a direct-swap.
Or can anyone tell me the output shiaft diameter so I can find an equivalent motor.
Quelle est la pression d’éjection svp?
@Kenny Millar – The output shaft diameter should be 3/4 inch. I believe the GX140 engine is still available. If you are on a tight budget, you might consider the Lifan LF160F-AQ. It is a Chinese Honda clone (a “Chonda”) and is rated 4hp, not 5hp, but it should bolt right up. Lifan engines are probably the best Chonda engines available. I know both Home Depot and Amazon sell them.