Honda GX110

Honda GX110 engineThe Honda GX110 is a 0.11 l (107 cc, 6.5 cu-in) single-cylinder air-cooled four-stroke internal combustion gasoline engine manufactured by Honda Motor Company since 1983 for general-purpose applications, such as pressure washers, commercial lawn and garden equipment, tillers and cultivators, generators, construction or industrial equipment, agricultural equipment, small vehicles, water pumps.

The Honda GX110 engine has an overhead valve (OHV) design for increased efficiency and optimal power transfer, sophisticated air intake system, large capacity, multi-chamber exhaust system, and heavy-duty recoil starter. This engine used horizontal type carburetor with a butterfly valve, transistorized magneto ignition system, splash type lubricating system, and forced-air cooling system. The engine used a dual element (dry/semidry) air cleaner.

The GX110 engine produces 2.6 kW (3.5 PS) at 4,000 rpm of maximum horsepower and 6.68 N·m (0.7 kg·m, 5.2 ft·lb) at 2800 rpm of maximum torque.

General information

Engine Specifications
Engine model GX110
Type 4-stroke, OHV, single cylinder, inclined by 25°
Displacement 107 cm 3 (6.5 cu-in)
Max. horsepower 3.5 PS (2.6 kW) at 4000 rpm
Max. torque 6.68 N·m (0.7 kg·m, 5.2 ft·lb) at 2800 rpm
Carburetor Horizontal type, butterfly valve
Cooling system Forced-air
Ignition system Transistorized magneto ignition
Lubricating system Splash
Starting system Recoil starter
Stoping system Ignition primary circuit ground
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity 2.5 L (0.66 US Gal, 0.55 Imp Gal.)
Fuel consumption 230 g/HPh
PTO shaft rotation Counterclockwise (from PTO shaft side)
Dimensions (L x W X H) 320 x 345 x 320 mm (12.6 x 13.6 x 12.6 in)
Dry weight 12.0 kg (25.6 lb)

Cylinder Block and Head

The Honda GX110 has cast iron cylinder sleeve, ball bearing supported crankshaft, improved piston design, heavy-duty balancer shaft. The cylinder bore is 57.0 mm (2.24 in) and the piston stroke is 42.0 mm (1.65 in). The compression ratio rating is 8.7:1.

Cylinder block
Compression ratio: 8.7:1
Bore x Stroke 57.0 mm X 42.0 mm (2.24 x 1.65 in)
Sleeve internal diameter 57.000-57.015 mm (2.2440-2.2447 in)
Piston skirt outer diameter 56.965-56.985 mm (2.2427-2.2435 mm)
Number of piston rings (compression / oil): 2 / 1
Ring side clearance (Top/second) 0.015-0.045 (0.0006-0.0018)
Ring end gap (Top/second) 0.20-0.40 mm (0.0079-0.0157 in)
Ring end gap (Oil) 0.15-0.35 mm (0.006-0.0137 in)
Ring width (Top/second) 1.5 mm (0.059 in)
Ring width (Oil) 2.5 mm (0.98 in)
Piston pin outer diameter: 12.994-13.000 mm (0.5115-0.5118 in)
Crankshaft main journal diameter: 26.0 mm (1.02362 in)
Cylinder Head
Warpage (limit) 0.10 mm (0.004 in)
Valve Arrangement: OHV
Valves: 2
Stem outer diameter (INTAKE): 5.468-5.480 mm (0.2152-0.2157 in)
Stem outer diameter (EXHAUST): 5.425-5.440 mm (0.2135-0.2141 in)
Cam height (INTAKE): 27.70 mm (1.0905 in)
Cam height (EXHAUST): 27.75 mm (1.0925 in)
Camshaft journal diameter: 14.00 mm (0.5511 in)

Service Data

Maximum speed 3,960 ± 100 rpm
Idle speed 1400 ± 150 rpm
Cylinder compression 6.0-8.5 kg/cm2 (85-151 psi) at 600 rpm
Type Horizontal type, butterfly valve
Main jet #60
Float height 13.7±1.5 mm (0.54±0.06 in)
Pilot screw opening 2-1/4 turns out
Oil system
Lubricating system Splash type
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.)
Ignition system
Ignition timing B.T.D.C. 25° / 1,400 rpm
Type Transistorized magneto ignition
Spark plug NGK: BPR6ES
Spark plug gap 0.7-0.8 mm (0.028-0.031 in)
Ignition coil air gap 0.2-0.6 mm (0.01-0.02 in)


Manufacturer or Brand Models
Honda EG1200X, EG1400X
Honda F380
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.

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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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