The Honda GX35 is a 35.8 cc, 2.2 cu-in) single-cylinder air-cooled four-stroke internal combustion ultra-small 360° inclinable gasoline engine manufactured by Honda Motor Company since 2002.
The Honda GX35 engine is a suitable power source for different applications like commercial lawn and garden equipment, tillers and cultivators, construction and industrial equipment, agricultural equipment, and water pumps.
This engine has an OHC design with valve rocker arms and camshaft driven by a maintenance-free, low-noise timing belt, makes the engine more compact and light. It has a recoil starter, diaphragm type carburetor with the accelerator pump, transistorized magneto ignition.
The cylinder bore is 39.0 mm (1.5 in) and the piston stroke is 30.0 mm (1.2 in). The Honda GX35 mini-motor produced 1.6 PS (1.21 kW) at 7000 rpm and 1.9 Nm (0.19 kg·m, 1.4 ft·lb) at 5000 rpm.
General information
| Engine Specifications | |
| Model | GX35 |
| Type | 4-stroke, OHC, single cylinder |
| Displacement | 35.8 cm 3 (2.2 cu-in) |
| Max. horsepower | 1.6 PS (1.21 kW) at 7,000 rpm |
| Max. torque | 1.9 Nm (0.19 kg·m, 1.4 ft·lb) at 5,000 rpm |
| Carburetor | Diaphragm type |
| Cooling system | Forced-air |
| Ignition system | Transistorized magneto ignition |
| Lubricating system | Oil mist |
| Starting system | Recoil starter |
| Stoping system | Ignition primary circuit ground |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel tank capacity | 0.65 L (0.17 US gal, 0.14 lmp gal) |
| Fuel consumption | 360 g/kWh (265 g/HPh, 0.58 lb/HPh) |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Cylinder Block and Head
| Cylinder block | ||
| Compression ratio: | 8.0:1 | |
| Bore x Stroke | 39 X 30 mm (1.5 x 1.2 in) | |
| Sleeve internal diameter | 39.00 mm (1.535 in) | |
| Piston skirt outer diameter | 38.970-38.990 mm (1.534-1.535 in) | |
| Connecting rod small end ID | 7.978-7.989 mm (0.3141-0.3145 in) | |
| Ring end gap | Top/second | 0.10-0.25 mm (0.004-0.010 in) |
| Ring width | Top/second | 0.970-0.990 mm (0.038-0.039 in) |
| Side clearance | Top/second | 0.015-0.056 mm (0.0006-0.0022 in) |
| Cylinder Head | ||
| Warpage (max) | 0.2 mm (0.01 in) | |
| Valve Arrangement: | OHC | |
| Valves: | 2 | |
| Stem outer diameter (standard): | INTAKE | 3.470-3.485 mm (0.1366-0.1372 in) |
| EXHAUST | 3.435-3.450 mm (0.1352-0.1358 in) | |
| Valve guide internal diameter | 3.50-3.52 mm (0.1378-0.1385 in) | |
| Valve spring free length | 21.77 mm (0.8570 in) | |
| Cam height: | INTAKE | 22.46 mm (0.884 in) |
| EXHAUST | 22.46 mm (0.884 in) | |
Tightening torque specs
| Tightening torque specs | |
| Lower crankcase | 6.4 Nm; 0.7 kg·m; 5.1 ft·lb |
| Fan cover | 6.4 Nm; 0.7 kg·m; 5.1 ft·lb |
| Reed valve plate | 3.0 Nm; 0.3 kg·m; 2.2 ft·lb |
| Ignition coil | 3.4 Nm; 0.35 kg·m; 2.5 ft·lb |
| Recoil starter pulley | 6.4 Nm; 0.7 kg·m; 4.6 ft·lb |
| Flywheel | 22.6 Nm; 2.3 kg·m; 16.7 ft·lb |
| Valve adjusting lock nut | 4.9 Nm; 0.5 kg·m; 3.6 ft·lb |
| Spark plug | 11.8 Nm; 1.2 kg·m; 8.7 ft·lb |
| Clutch bolt | 15.2 Nm; 1.5 kg·m; 11 ft·lb |
Maintenance data
| Engine | |
| Idle speed | 3100 ± 200 rpm |
| Cylinder compression | 9.2-11.2 kg/cm2 (131-159 psi) at 2,000 rpm |
| Valve clearance | |
| Intake valve | 0.08 ± 0.02 |
| Exhaust valve | 0.11 ± 0.02 |
| Carburetor | |
| Main jet |
#38 (SAU, SAUT and SUT types) #37 (For others) |
| Oil system | |
| Oil type | Honda 4-stroke or an equivalent (SG, SF) |
| Recommended oil | SAE 10W-30 |
| Oil capacity | 0.10 L (3.4 US oz, 3.5 lmp oz) |
| Ignition system | |
| Ignition timing | 27 ° B.T.D.C (Fixed) |
| Spark plug | NGK: CMR8H |
| Spark plug gap | 0.6-0.7 mm (0.024-0.028 in) |
| Primary ignition coil resistance | 0.7-0.9 Ω |
| Secondary ignition coil resistance | 6.1-9.3 kΩ |
| Ignition coil air gap | 0.2-0.4 mm (0.008-0.016 in) |
Author:
I am kinda of stunned as this is a very small engine and I would have thought that Honda would be crowing about it’s light weight but I don’t see weight in the specs.Do you know what it is? Cheers, Brad.Brad.
The GX35 weighs 7.6 pounds dry. Also, it is OHC, not OHV. In the photo, you can clearly read “OHC” in the red shroud near the top of the engine.
can you send me details how to purches this machine and where any places in nepal loacation address contacts dealer and price. or india places.
please sir ?
До Сергей:
Горещо Ви благодаря за предоставената техническа информация за двигателя GX35!
Желая Ви здраве и успехи.
Could you please tell me how o get an user manual . I have bought one of these engines but cannot get the cover off the access to throttle or carburettor
Thanks