reliable, fuel efficient performance


The EFI (electronic fuel injection) configuration eliminates the carburettor and allows an electronically-controlled fuel injector to deliver the required quantity of fuel, thus offering a number of key features for the new Honda models, including:

  • Fuel efficiency due, in part, to an electronic control system that continuously monitors and adjusts the engine’s air/fuel ratio according to variable operating conditions.
  • Enhanced reliability and less maintenance due to reduced fuel-associated carburettor issues.
  • Improved starting by continuously optimizing the air/fuel mixture.
  • Improved user comfort by eliminating the manual choke and fuel shut-off valve.



This engine features a compact design including a hemispherical combustion chamber, integrated cylinder and cylinder head and forged steel connecting rods.  Other features that users will appreciate include a digital ignition system, long-life air filter, automotive-style starter motor and a pressurized fuel pump.  All these elements contribute to high efficiency, superior cooling, low noise and vibrations as well as reliable performance.


The Honda iGX engines are the very finest stationery engines being produced by powering construction equipment (concrete saws, ride-on concrete trowels, vibratory rollers, generators, etc.) and lawn and garden equipment (tractors, shredders, etc.). 


The iGX800's high capacity pump facilitates consistent oil delivery, and a handy oil alert so there is no risk of running dry and doing damage to the engine. There's a dual cylindrical air filter, and a large diameter air intake on board for superior cooling, perfect when operating over long periods of time.

The result is a long-lasting, high-performing and reliable engine.

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Model GX800IRH
Type 4-stroke OHV petrol engine, horizontal shaft
Bore & Stroke 2 / 83 x 72mm
Displacement 799cm3
Compression Ratio 9:1
Net Power 18.5 kW (24.8 HP) / 3600rpm
Continuous Rated Power 13.3 kW (17.8 HP) / 3000 rpm 15.0 kW (20.1 HP) / 3600rpm
Max Net Torque 54.5Nm / 5.56 kgfm / 2500rpm
Ignition System Full transistor ignition coil
Starting System Electric starter
Fuel Consumption at Rated Power 6.88 L/hr - 3600rpm
Lubrication System Full-pressure
Recommended Fuel Unleaded
Capacity and Dimensions
Oil Capacity Without oil filter replacement: 1.6L
With oil filter replacement: 1.8L
Dimensions 429 x 492 x 438 mm (T-Type)
Dry Weight 48.2kg

the honda advantage

no fuel mixing

FUEL EFFICIENT & enviro friendly


power & torque

3 year warranty

Honda's leading range of power equipment comes with leading warranty periods. Our range of GX engines carrying up to a 3 year warranty*.

With regular servicing by a Honda authorised dealer, using only Honda Genuine Parts and Accessories, your Honda product will work hard around your home for many years. 

Find more details on Honda's warranties and the warranty schedule on our warranty page. 


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Ready to take the next step towards your Honda engine? With our nationwide network of dealers, from the far north to the deep south and everywhere in between. You can purchase online, or enquire now for more information on Honda Engines. 

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