Honda GXV270

Honda GXV270The Honda GXV270 is a 270 cc, (16.48 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.

Cylinder bore and piston stroke are 77.0 mm (3.03 in) and 58.0 mm (2.28 in), respectively. Compression ratio rating is 7.8:1.

This engine produced 8.6 PS (6.35 kW; 8.5 HP) at 3,600 rpm of horsepower and 18.0 N·m (1.8 kg·m, 13.3 ft·lb) at 2,500 rpm of torque.

The Honda GXV270 features:

  • Overhead valve (OHV) design
  • Transistorized magneto ignition system
  • Horizontal type carburetor with butterfly valve
  • Centrifugal governor
  • Pressure and splash lubrication system
  • Forced air cooling system
  • Recoil or electric starter

General information

Engine Specifications
Engine modelGXV270
Engine type4-stroke, OHV, single-cylinder
Displacement270 cm3, (16.48 cu·in)
Max. horsepower8.6 PS (6.35 kW; 8.5 HP) at 3,600 rpm
Max. torque18.0 N·m (1.8 kg·m, 13.3 ft·lb) at 2,500 rpm
Cooling systemForced air
Air cleanerDual-element type
Lubricating systemPressure and splash
Ignition systemTransistorized magneto ignition
Fuel systemHorizontal type carburetor with butterfly valve
Fuel consumption240 g/HPh
Fuel tank capacity2.0 L (0.53 US. gal. 0.44 Imp. gal.)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Starting systemRecoil or electric starter
Stoping systemIgnition primary circuit ground
GovernorCentrifugal governor
PTO shaft rotationCounterclockwise (from PTO shaft side)
Dimensions (L x W X H)410 x 385 x 405 mm (16.1 x 15.2 x 15.9 in)
Dry weight28.0 kg (61.7 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:7.8:1
Cylinder bore:77.0 mm (3.03 in)
Piston stroke:58.0 mm (2.28 in)
Cylinder internal diameter (standard):77.000 mm (3.0315 in)
Piston skirt outer diameter (standard):76.985 mm (3.0309 in)
Number of piston rings (compression / oil):2/1
Side clearance (Top):0.150-0.450 mm (0.0059-0.0177 in)
Side clearance (Second):0.150-0.450 mm (0.0059-0.0177 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):0.200-0.700 mm (0.0079-0.0276 in)
Ring width (Top):2.000 mm (0.0787 in)
Ring width (Second):2.000 mm (0.0787 in)
Crankshaft main journal diameter:32.985 mm (1.2986 in)
Cylinder head
Valve arrangement:OHV, gear driven
Valves:2
Valve steam diameter (INTAKE):6.590 mm (0.2594 in)
Valve steam diameter (EXHAUST):6.550 mm (0.2579 in)
Camshaft lobe height (INTAKE):33.000 mm (1.2992 in)
Camshaft lobe height (EXHAUST):32.600 mm (1.2835 in)
Camshaft journal diameter :16.000 mm (0.6299 in)

Tightening torque specs

Tightening torque specs
Connecting rod bolt14 Nm; 1.4 kg·m; 10 ft·lb
Cylinder head bolt35 Nm; 3.5 kg·m; 25 ft·lb
Flywheel nut115 Nm; 11.5 kg·m; 83 ft·lb
Pivot adjusting nut10 Nm; 1.0 kg·m; 7 ft·lb
Push rod guide pivot bolt24 Nm; 2.4 kg·m; 17 ft·lb
Oil pan bolt24 Nm; 2.4 kg·m; 17 ft·lb
Air cleaner body cap nut9 Nm; 0.9 kg·m; 6.5 ft·lb
Muffler mounting nut24 Nm; 2.4 kg·m; 17 ft·lb
Exhaust pipe mounting nut24 Nm; 2.4 kg·m; 17 ft·lb
Oil drain plug45 Nm; 4.5 kg·m; 34 ft·lb
Cylinder head cover bolt9 Nm; 0.9 kg·m; 6.5 ft·lb
Fuel tank bolt24 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:3400 ± 150 rpm
Idle speed:1400 ± 150 rpm
Cylinder compression:6.0-8.5 kg/cm2 (85-151 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:Pressure and splash
Oil type:Honda 4-stroke or an equivalent (SE or SF)
Recommended oil:SAE 10W-40
Oil capacity:1.1 L (1.16 US. qt, 0.97 Imp. qt.)
Fuel system
Type:Horizontal type carburetor with butterfly valve
Main jet:#85
Float height:11.9-14.5 mm (0.47-0.57 in)
Pilot screw opening:2-1/4 turns out
Ignition system
Type:Transistorized magneto ignition
Ignition timing:20° B.T.D.C. (Fixed)
Spark plug:NGK: BPR5ES NIPPONDENSO: W16EPR-U
Spark plug gap:0.7-0.8 mm (0.0276-0.0315 in)
Ignition coil air gap0.3-0.5 mm (0.0118-0.0197 in)
Author: Sergei Wers
About: 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.

ATTENTION! Dear visitors, this is an informational database of technical specifications, we are not a parts supplier or a marketplace.

We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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