Honda GX160 T1/K1

Honda GX160 T1/K1The Honda GX160 T1/K1 is a 163 cc (9.95 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Honda Motor Company for general-purpose applications.

It has a 68.0 mm (2.68 in) cylinder bore and 45.0 mm (1.77 in) piston stroke. The compression ratio rating is 7.5:1 or 8.5:1.

The GX160 T1/K1 engine produced 6 PS (4.4 kW; 6.0 HP) at 4,000 rpm of maximum horsepower and 11.0 N·m (1.1 kg·m, 8.1 ft·lb) at 2,500 rpm of maximum torque.

The Honda GX160 T1/K1 features:

  • OHV design
  • Transistorized magneto ignition system
  • Horizontal carburetor with butterfly valve
  • Centrifugal govervor
  • Splash type lubrication system
  • Forced air cooling system
  • Recoil or electirc starter

General information

Engine Specifications
Engine model GX160 T1/K1
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 4,000 rpm
Max. torque Crank PTO: 11.0 N·m (1.1 kg·m, 8.1 ft·lb) at 2,500 rpm
With 1/2 reduction: 22 N·m (2.2 kg·m, 16 ft·lb) at 1,250 rpm
With 1/6 reduction: 66 N·m (6.6 kg·m, 48 ft·lb) at 420 rpm
Cooling system Forced air
Air cleaner Dual element type
Semi-dry type
Oil-bath type
Cyclone type
Lubricating system Splash type
Ignition system Transistorized magneto ignition
Fuel system Horizontal carburetor with butterfly valve
Fuel consumption 230 g/PSh
Fuel tank capacity 3.6 L (0.95 US. gal. 0.79 Imp. gal.)
Fuel used Unleaded gasoline (octane number 86 or higher)
Starting system Recoil or electirc starter
Stoping system Ignition primary circuit ground
Governor Centrifugal govervor
PTO shaft rotation Counterclockwise (from PTO shaft side)

Cylinder Block and Head

Cylinder block
Compression ratio: 7.5:1 or 8.5:1
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)
Side clearance (Top): 0.015-0.045 mm (0.0006-0.0018 in)
Side clearance (Second): 0.015-0.045 mm (0.0006-0.0018 in)
Side clearance (Oil): 0.015-0.045 mm (0.0006-0.0018 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): 1.5 mm (0.0591 in)
Ring width (Second): 1.5 mm (0.0591 in)
Ring width (Oil): 2.5 mm (0.0984 in)
Crankpin journal diameter: 29.980 mm (1.1803 in)
Crankshaft center distance: 22.5 mm (0.885 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): 30.500 mm (1.2008 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 bolt 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
Rocker arm pivot lock nut 10 Nm; 1.0 kg·m; 7 ft·lb
Rocker arm pivot bolt 24 Nm; 2.4 kg·m; 17 ft·lb
Crankcase cover bolt 12 Nm; 1.2 kg·m; 9 ft·lb
Oil level switch joint nut 10 Nm; 1.0 kg·m; 7 ft·lb
Oil drain bolt 18 Nm; 1.8 kg·m; 13 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: 3,800-4,000 rpm
Idle speed: 1,250-1,600 rpm
Cylinder compression: 6.0-8.5 kg/cm2 (85-121 psi) at 600 rpm
Valve clearance
Intake valve clearance: 0.13-0.17 mm (0.0051-0.0067 in)
Exhaust valve clearance: 0.18-0.22 mm (0.0071-0.0087 in)
Oil system
Lubrication system: Splash type
Oil type: SAE 10W-30
Recommended oil: Honda 4-stroke or an equivalent (SE or SF)
Oil capacity: 0.6 L (0.63 US. qt, 0.53 Imp. qt.)
Fuel system
Type: Horizontal carburetor with butterfly valve
Main jet: Externally vented carburetor bowl: #72
Internally vented carburetor bowl: #68
Float height: 13.7 mm (0.5394 in)
Pilot screw opening: Externally vented carburetor bowl: 2 turns out
Internally vented carburetor bowl: 2-1/8 turns out
Ignition system
Type: Transistorized magneto ignition
Ignition timing: 25° B.T.D.C. (Fixed)
Spark plug: NGK: BP6ES, BPR6ES
NIPPONDENSO: W20EP-U, W20EPR-U
Spark plug gap: 0.7-0.8 mm (0.0276-0.0315 in)
Spark plug torque: 18 N·m (1.8 kg·m, 13.3 ft·lb)
Ignition coil air gap 0.2-0.6 mm (0.0079-0.0240 in)

Applications

Manufacturer or Brand Models
Generators
Honda EC2000