The Honda GXV160 is an 163 cc, (9.95 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion gasoline engine with a vertical shaft, manufactured by Honda Motor Company for general-purpose applications.
A 68.0 mm (2.68 in) cylinder bore and 45.0 mm (1.77 in) piston stroke give the GXV160 engine a total of 163 cc of displacement. The compression ratio rating is 8.0:1.
This engine produced 6.0 PS (4.4 kW; 6.0 HP) at 3,600 rpm of horsepower and 10.8 N·m (1.1 kg·m, 8 ft·lb) at 2,500 rpm of torque.
The Honda GXV160 features:
- Overhead valve (OHV) design
- Transistorized magneto ignition system
- Horizontal type carburetor with butterfly valve
- Centrifugal governor
- Splash lubrication system
- Forced air cooling system
- Recoil or electric starter
General information
| Engine Specifications | |
| Engine model | GXV160 |
| Engine type | 4-stroke, OHV, single-cylinder |
| Displacement | 163 cm3, (9.95 cu·in) |
| Max. horsepower | 6.0 PS (4.4 kW; 6.0 HP) at 3,600 rpm |
| Max. torque | 10.8 N·m (1.1 kg·m, 8 ft·lb) at 2,500 rpm |
| Cooling system | Forced air |
| Lubricating system | Splash |
| Ignition system | Transistorized magneto ignition |
| Fuel system | Horizontal type carburetor with butterfly valve |
| Fuel consumption | 250 g/HPh |
| Fuel tank capacity | 2.0 L (0.53 US. gal. 0.44 Imp. gal.) |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Recoil or electric starter |
| Stoping system | Ignition primary circuit ground |
| Governor | Centrifugal governor |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 435 x 345 x 355 mm (17.1 x 13.6 x 14 in) |
| Dry weight | 15.5 kg (34.2 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 8.0:1 |
| Cylinder bore: | 68.0 mm (2.68 in) |
| Piston stroke: | 45.0 mm (1.77 in) |
| Cylinder internal diameter (standard): | 68.000 mm (2.6772 in) |
| Piston skirt outer diameter (standard): | 67.985 mm (2.6766 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Connecting rod big end diameter (standard): | 30.020 mm (1.1819 in) |
| Connecting rod small end diameter (standard): | 18.005 mm (0.7089 in) |
| Piston pin diameter: | 18.000 mm (0.7087 in) |
| Side clearance (Top): | 0.030-0.065 mm (0.0012-0.0026 in) |
| Side clearance (Second): | 0.030-0.65 mm (0.0012-0.0256 in) |
| Ring end gap (Top): | 0.200-0.400 mm (0.0079-0.0157 in) |
| Ring end gap (Second): | 0.200-0.400 mm (0.0079-0.0157 in) |
| Ring end gap (Oil): | 0.150-0.350 mm (0.0059-0.0138 in) |
| Ring width (Top): | 1.500 mm (0.0591 in) |
| Ring width (Second): | 1.500 mm (0.0591 in) |
| Ring width (Oil): | 2.500 mm (0.0984 in) |
| Crankpin journal diameter: | 29.980 mm (1.1803 in) |
| Cylinder head | |
| Valve arrangement: | OHV, gear driven |
| Valves: | 2 |
| Valve steam diameter (INTAKE): | 5.480 mm (0.2157 in) |
| Valve steam diameter (EXHAUST): | 5.440 mm (0.2142 in) |
| Valve spring free length (INTAKE): | 34.000 mm (1.3386 in) |
| Valve spring free length (EXHAUST): | 34.000 mm (1.3386 in) |
| Camshaft lobe height (INTAKE): | 27.700 mm (1.0905 in) |
| Camshaft lobe height (EXHAUST): | 27.750 mm (1.0925 in) |
| Camshaft journal diameter : | 13.984 mm (0.5506 in) |
Tightening torque specs
| Tightening torque specs | |
| Connecting rod lower cap | 12 Nm; 1.2 kg·m; 9 ft·lb |
| Cylinder head bolt | 24 Nm; 2.4 kg·m; 17 ft·lb |
| Flywheel nut | 75 Nm; 7.5 kg·m; 54 ft·lb |
| Pivot adjusting nut | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Pivot bolt | 24 Nm; 2.4 kg·m; 17 ft·lb |
| Oil filter extension | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Oil drain bolt | 18 Nm; 1.8 kg·m; 13 ft·lb |
| Oil pan | 24 Nm; 2.4 kg·m; 17 ft·lb |
| Standard torque values | |
| Bolt, nut (5 mm) | 5.5 Nm; 0.55 kg·m; 4.0 ft·lb |
| Bolt, nut (6 mm) | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Bolt, nut (8 mm) | 24 Nm; 2.4 kg·m; 17 ft·lb |
| Bolt, nut (10 mm) | 37.5 Nm; 3.75 kg·m; 27 ft·lb |
| Bolt, nut (12 mm) | 55 Nm; 5.5 kg·m; 40 ft·lb |
Service Data
| Engine | |
| Maximum speed: | 3,200 ± 100 rpm |
| Idle speed: | 1,700 ± 150 rpm |
| Cylinder compression: | 5.0-8.0 kg/cm2 (71-114 psi) at 600 rpm |
| Valve clearance | |
| Intake valve clearance: | 0.15±0.02 mm (0.006±0.001 in) |
| Exhaust valve clearance: | 0.20±0.02 mm (0.008±0.001 in) |
| Oil system | |
| Lubrication system: | Splash |
| Oil type: | Honda 4-stroke or an equivalent (SE or SF) |
| Recommended oil: | SAE 10W-30 |
| Oil capacity: | 0.6 L (0.63 US. qt, 0.53 Imp. qt.) |
| Fuel system | |
| Type: | Horizontal type carburetor with butterfly valve |
| Main jet: | #70 |
| Float height: | 12.2-15.2 mm (0.48-0.60 in) |
| Pilot screw opening: | 2 turns out |
| Ignition system | |
| Type: | Transistorized magneto ignition |
| Ignition timing: | 20° B.T.D.C. (Fixed) |
| Spark plug: | NGK: BP5ES, BPR5ES NIPPONDENSO: W16EP-U, W16EPR-U |
| Spark plug gap: | 0.7-0.8 mm (0.0276-0.0315 in) |
| Ignition coil air gap | 0.3-0.5 mm (0.0118-0.0197 in) |
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