Approximately 20 horsepower.
The Honda iGX800 is a heavy-duty industrial engine in Honda’s iGX lineup. The model designation suggests its place in the series, and it is commonly cited as delivering around 20 horsepower under standard testing conditions. Exact horsepower can vary with operating speed, load, altitude, and the specific configuration of the unit, so always refer to the official data sheet or nameplate for your particular model.
What the 20 HP figure means in practice
The horsepower rating is a measure of output at defined conditions and does not always reflect real-world performance in every application. Here are the key points to understand about the iGX800 horsepower rating:
The following points summarize how horsepower is defined and what affects it for the iGX800.
- Typical quoted power is around 20 HP at the engine’s standard operating speed (commonly 3600 rpm for many Honda industrial engines).
- There is a distinction between continuous (rated) horsepower and peak (short-term) horsepower; the iGX800’s spec sheet may specify one or both depending on the model and intended application.
- Real-world output is affected by air intake, exhaust restrictions, temperature, altitude, and fuel quality.
- Electronic fuel injection (EFI) and engine management in the iGX line are designed to optimize efficiency and maintain power delivery under varied conditions.
For precise numbers for your unit, check the data plate on the engine or the official Honda documentation for the exact model variant you own.
Where to find the official specification
To verify the horsepower, access Honda’s official documentation or consult your equipment’s manual. Look for the "Power" or "Horsepower" section in the technical data for the iGX800; it will specify the rpm, whether the rating is continuous or peak, and the power in hp and kW.
- Find the model’s data sheet in Honda’s literature or website for the iGX800 variant; ensure you’re viewing the correct year and configuration.
- Check the rating at the specified RPM (for example, 3600 rpm) and note whether it is continuous or peak power.
- Read any notes about operating conditions (altitude, temperature) that accompany the rating.
- Look at the engine label on your unit for a direct, up-to-date horsepower figure.
The following steps help you locate and interpret the exact horsepower rating:
In short, the exact horsepower can vary by version and testing conditions, so rely on the official documents for accuracy.
Additional context
Horsepower alone does not tell the whole story about an engine’s capacity. Torque, rpm, and efficiency at load determine how an engine performs in a given application, such as generators, pumps, or compressors used with iGX800-powered equipment.
Summary
The Honda iGX800 is generally described as producing about 20 horsepower, with the exact figure depending on rpm, configuration, and testing standards. For precise numbers, consult the data plate on your unit or Honda’s official spec sheet for the exact model version you own.


