
The fuel burn of a generator depends on various factors, such as the type of engine, vintage, and load. For example, a 9kw generator burns between 0.5 and 0.75 gallons per hour, while a 16kw generator burns about 0.75 gallons per hour under a normal load. The fuel burn of a 6kw Onan diesel generator may vary depending on the specific model and operating conditions, but it is generally estimated to be around 0.5 gallons per hour under average load conditions. However, it's important to note that the load is not static and can vary depending on the appliances being used.
| Characteristics | Values |
|---|---|
| Model | Onan Diesel 6.0kW |
| Type | 2-cylinder genset |
| Engine | DJB |
| RPM | 1800 |
| Fuel Tank Capacity | 5 gallons |
| Fuel Consumption | 0.5-0.75 gallons per hour |
Explore related products
What You'll Learn

The fuel burn of a 6kW Onan diesel generator depends on the load
The fuel burn of a generator is also influenced by the type of engine and its vintage. For instance, a 7.5 kW Onan generator from the 1970s or 1980s would deliver 12 hp-hour/gallon, while a newer model might achieve 16 or 17 hp-hour/gallon.
Assuming the 6kW Onan diesel generator is a newer model with an efficiency of 17 hp-hour/gallon, we can estimate its fuel consumption. Each kilowatt requires approximately 2 hp of energy, so a 6kW generator would need 12 hp. Dividing the required horsepower by the engine's efficiency gives us the fuel burn: 12/17 = 0.71 gallons per hour at full load.
At half load, the fuel consumption would be lower. Using the same efficiency estimate, the fuel burn would be: 6/17 = 0.35 gallons per hour.
Bleach and Diesel: A Dangerous Mix?
You may want to see also
Explore related products

A 9 kW genset burns 0.5-0.75 gph
The fuel consumption of a generator depends on its size and the load under which it is operating. A 9 kW genset, for example, burns 0.5-0.75 gallons of fuel per hour, according to one source with over 1,100 hours of usage. This is consistent with the fuel consumption rates of other generators of a similar size.
A 9 kW Onan with a Kubota diesel engine, for instance, burns 0.5 gallons at 50% load and 1 gallon at 100% load, according to the manual. Another user with an Onan 8 kW generator, which runs their house as a hurricane generator, reports a consistent rate of 12 gallons per 24 hours.
It's worth noting that gensets typically run at 25-50% load on average on a boat, so for a 9 kW generator, 0.5 gallons per hour is a reasonable estimate. However, fuel consumption can vary depending on the specific appliances being used and the load they draw. For example, running a fridge and two ACs may result in a fuel burn rate of 1/3 to 1/2 gallons per hour.
Additionally, there are no established standards or regulations governing how manufacturers measure fuel consumption for generator sets, so the actual fuel burn rate may vary from the specifications provided.
Diesel vs Gasoline: Which Fuel Has a Longer Shelf Life?
You may want to see also
Explore related products

A 100 kW generator burns more fuel at 10kW than a 10kW generator
A 6kW Onan diesel generator, such as the Cummins Onan 6000, will have a fuel consumption of around 0.5 gallons per hour, although this may vary depending on the load and other factors. For example, the load is not static as 120V devices and appliances will change their draws from time to time, with air conditioners cycling on and off.
Now, onto the comparison between a 100 kW generator and a 10 kW generator. Interestingly, a 100 kW generator will burn more fuel at 10 kW than a 10 kW generator set. This may seem counterintuitive, but there are several factors influencing fuel consumption in generators. Firstly, larger generators require bigger engines to power the full load, resulting in higher fuel consumption. Additionally, the efficiency of the engine plays a role, with generators that have low power requirements and stable loads often fitted with fuel governors to control fuel delivery.
The type of fuel also impacts fuel consumption rates. Natural gas generators, for instance, tend to use more fuel than diesel generators, but natural gas is typically lower in cost. Diesel generators are known for their quick startup and high power density, making diesel the preferred choice for larger generators. However, natural gas offers a continuous, clean-burning supply, eliminating the need for large on-site fuel storage.
Furthermore, the specific fuel consumption metric measures a generator's efficiency by evaluating how much fuel it uses to produce one unit of power. This metric can help users understand and optimise their generator's fuel usage. It's important to note that there are no established standards for how manufacturers measure fuel consumption for generator sets or engines, so direct comparisons between different generators may be challenging.
To ensure optimal fuel efficiency, it's recommended to match the generator's size with typical load requirements and avoid overloading the generator. Regular maintenance and the use of modern generators with advanced technology can also contribute to reduced fuel consumption and improved performance.
How to Use Old Diesel Fuel?
You may want to see also

Onan 7.5 KW older units have DD 2 cycles of 16 hp-hour/gallon
The fuel consumption of a generator depends on several factors, including the type of engine, its vintage, and the load at which it is being run. For example, a 100kW generator will burn more fuel at 10kW than a 10kW generator set.
For comparison, a 9 kw genset burns between 0.5 and 0.75 gallons per hour. A 15kw generator burns 0.67 gallons per hour at half load. A 16kw generator burns 0.75 gallons per hour under normal load.
The Cummins Onan 6000 generator does not have a standard fuel consumption rate, as it depends on the load at which it is being run. The general estimate is 0.5 gallons per hour, but it may be less or more.
Diesel Fuel Costs in Arizona: Current Prices
You may want to see also

Onan RV QD 6000-Watt Diesel Generator Set runs two 15,000 BTU air conditioners
The Onan RV QD 6000-Watt Diesel Generator Set can run two 15,000 BTU air conditioners. This generator is ideal for diesel-powered Class A and Class C motorhomes, as well as diesel truck campers. The Onan 6000-Watt Generator runs two 15,000 BTU air conditioners on a 1000-watt base load, with an additional 600 watts available for lights, electronics, and entertainment.
The generator set incorporates digital voltage regulation and frequency control with a pure sine wave output that won't harm electronics. It also includes overload protection in the form of a 30-Amp, 2-Pole circuit breaker. The Onan RV QD 6000 Diesel Generator Set is designed for quiet operation, meeting all National Park Service sound level requirements of 60 dBA or less at fifty feet.
The generator's fully enclosed design includes a USDA-approved, spark-arresting muffler, and an intake silencer, which help to reduce noise for smooth, quiet operation. A three-point fully localized mounting system further reduces vibration. The Onan RV QD 6000 Diesel Generator Set also comes with an hour meter, making it perfect for on-time maintenance and tracking total hours.
While the exact fuel consumption of this generator may vary depending on the load and specific operating conditions, some sources suggest that a general rule of thumb for a diesel generator of similar capacity is around 1/2 gallon of fuel per hour of operation. However, it's important to note that the actual fuel consumption may be less or more, depending on various factors.
Diesel Engines and Carbon Monoxide: A Deadly Combination
You may want to see also
Frequently asked questions
A 6kw Onan diesel generator is a 2-cylinder, air-cooled generator with a 5-gallon fuel tank.
The fuel burn of a 6kw Onan diesel generator is estimated to be between 0.5 and 0.75 gallons per hour. However, this may vary depending on the load and other factors.
The fuel burn of a generator can be affected by various factors, including the type of engine, vintage, load, and cooling system.
The fuel consumption of a generator depends on its specific characteristics and usage. Different generators will have varying fuel burns based on factors such as power output, efficiency, and operating conditions.

















