The Honda iGX270 is a 270 cc, (16.5 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.
A 77.0 mm (3.03 in) cylinder bore and 58.0 mm (2.28 in) piston stroke give the iGX270 engine a total of 270 cc of displacement. The compression ratio rating is 8.5:1.
The iGX270 engine produced 8.6 PS (6.3 kW; 8.4 HP) at 3,600 rpm of net power and 19.1 N·m (1.9 kg·m, 14.1 ft·lb) at 2,500 rpm of maximum torque.
The Honda iGX270 features:
OHV design
Cast iron cylinder sleeve
Ball bearing supported crankshaft
Heavy-duty balancer shaft
C.D.I.(Capacitor Discharge Ignition)
Horizontal type carburetor with butterfly valve
ECU (electronic control unit) with a self-tuning regulator (STR) governor system
Forced splash lubrication system
Forced air cooling system
Recoil or recoil and starter motor
General information
Engine Specifications
Engine model
iGX270
Engine type
4-stroke, OHV, single-cylinder
Displacement
270 cm3, (16.48 cu·in)
Max. horsepower
8.6 PS (6.3 kW; 8.4 HP) at 3,600 rpm
Max. torque
19.1 N·m (1.9 kg·m, 14.1 ft·lb) at 2,500 rpm
Cooling system
Forced air
Air cleaner
Dual element type
Lubricating system
Forced splash
Ignition system
C.D.I.(Capacitor Discharge Ignition)
Fuel system
Horizontal type carburetor with butterfly valve
Fuel consumption
2.4 Liters (0.63 US gal, 0.53 Imp gal)/h
Fuel tank capacity
5.3 L (1.4 US. gal. 1.17 Imp. gal.)
Fuel used
Unleaded gasoline (octane number 86 or higher)
Starting system
Recoil or recoil and starter motor
Stoping system
Ignition exciter coil circuit open
Governor
Self-tuning regulator (STR) governor system
PTO shaft rotation
Counterclockwise (from PTO shaft side)
Dimensions (L x W X H)
355 x 462 x 422 mm (14.0 x 18.2 x 16.6 in)
Dry weight
30.3 kg (66.8 lbs)
Cylinder Block and Head
Cylinder block
Compression ratio:
8.5:1
Cylinder bore:
77.0 mm (3.03 in)
Piston stroke:
58.0 mm (2.28 in)
Cylinder internal diameter (standard):
77.000-77.017 mm (3.0315-3.0322 in)
Piston skirt outer diameter (standard):
76.975-76.985 mm (3.0305-3.0309 in)
Number of piston rings (compression / oil):
2/1
Connecting rod big end diameter (standard):
33.025-33.039 mm (1.3002-1.3007 in)
Connecting rod small end diameter (standard):
18.005-18.020 mm (0.7089-0.7094 in)
Piston pin diameter:
17.994-18.000 mm (0.7084-0.7087 in)
Side clearance (Top):
0.030-0.060 mm (0.0012-0.0024 in)
Side clearance (Second):
0.030-0.060 mm (0.0012-0.0024 in)
Ring end gap (Top):
0.200-0.350 mm (0.0079-0.0138 in)
Ring end gap (Second):
0.350-0.500 mm (0.0138-0.0197 in)
Ring end gap (Oil):
0.200-0.700 mm (0.0079-0.0276 in)
Ring width (Top):
1.160-1.175 mm (0.0457-0.0463 in)
Ring width (Second):
1.160-1.175 mm (0.0457-0.0463 in)
Crankpin journal diameter:
32.975-32.985 mm (1.2982-1.2986 in)
Cylinder head
Valve arrangement:
OHV, gear driven
Valves:
2
Valve steam diameter (INTAKE):
6.575-6.590 mm (0.2589-0.2594 in)
Valve steam diameter (EXHAUST):
6.535-6.550 mm (0.2573-0.2579 in)
Valve spring free length (INTAKE):
39.0 mm (1.5354 in)
Valve spring free length (EXHAUST):
39.0 mm (1.5354 in)
Camshaft lobe height (INTAKE):
31.945-32.145 mm (1.2577-1.2655 in)
Camshaft lobe height (EXHAUST):
31.666-31.866 mm (1.2467-1.2546 in)
Camshaft journal diameter :
15.966-15.984 mm (0.6286-0.6293 in)
Tightening torque
Tightening torque specs
Connecting rod bolt (M8x1.25 Special)
14 Nm; 1.4 kg·m; 10 ft·lb
Cylinder head bolt (M10x1.25)
35 Nm; 3.5 kg·m; 25 ft·lb
Flywheel nut (M16x1.5 Special)
115 Nm; 11.5 kg·m; 83 ft·lb
Rocker arm pivot lock nut (M6x0.5)
10 Nm; 1.0 kg·m; 7 ft·lb
Rocker arm pivot bolt (M8x1.25 Special)
24 Nm; 2.4 kg·m; 17 ft·lb
Crankcase cover bolt (M8x1.25)
24 Nm; 2.4 kg·m; 17 ft·lb
Oil level switch joint nut (M10x1.25)
10 Nm; 1.0 kg·m; 7 ft·lb
Fuel filter joint nut (M10x1.25)
2 Nm; 0.2 kg·m; 1.4 ft·lb
Muffler mounting nut (M8x1.25)
24 Nm; 2.4 kg·m; 17 ft·lb
Air cleaner wing nut (M6x1.0)
9 Nm; 0.9 kg·m; 6.5 ft·lb
Oil drain bolt (M12x1.5)
23 Nm; 2.3 kg·m; 17 ft·lb
Fuel tank bolt (M8x1.25)
24 Nm; 2.4 kg·m; 17 ft·lb
Air cleaner mounting nut (M6x1.0)
10 Nm; 1.0 kg·m; 7 ft·lb
Fuel strainer cup (M24x1.0)
4 Nm; 0.4 kg·m; 2.9 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:
3,600±150 rpm
Idle speed:
1,400±150 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:
Forced splash
Oil type:
Honda 4-stroke or an equivalent (SE or later)
Recommended oil:
SAE 10W-30
Oil capacity:
1.1 L (1.16 US. qt, 0.97 Imp. qt.)
Ignition system
Type:
C.D.I.(Capacitor Discharge Ignition) type magneto ignition
Author:Sergei WersAbout: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.
The Honda iGX270 is a 270 cc, (16.5 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.
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