Categories: Articles, Resource managementPublished On: 10th October 2023

Dual Fuel Carburettors for Portable Generators: What are they, what do They do and Why we Should Use Them.

By 4 min read


In a world where energy efficiency and environmental consciousness are becoming increasingly important, the utilization of dual fuel carburettors for portable generators has emerged as a viable and sustainable alternative to traditional petrol -powered generators.

These innovative carburettors enable generators to operate on both liquefied petroleum gas (LPG) and natural gas, offering numerous advantages over their petrol counterparts. This article will explore what a dual fuel carburettor is, how it functions, and the various advantages it provides for users who seek a cleaner, more economical, and reliable power source.

Understanding Dual Fuel Carburettors

A carburettor is a device in an internal combustion engine that mixes air with a fine spray of liquid fuel, often petrol, to create a highly combustible mixture. In the context of portable generators, traditional carburettors are designed to work exclusively with petrol. However, dual fuel carburettors are engineered to allow generators to run on multiple fuel sources, primarily petrol, LPG (liquefied petroleum gas), and natural gas.

Here’s how a dual fuel carburettor works:

  1. Petrol Mode: In this mode, the generator operates as it would with a standard carburettor, using petrol as the primary fuel source. Users can switch between fuel sources as needed, making it versatile for various applications.
  2. LPG Mode: When users choose to run their generators on LPG, the dual fuel carburettor draws LPG from a separate tank and mixes it with the right amount of air for combustion. LPG, a cleaner-burning fuel, is compressed into a liquid state, making it easy to store and transport.
  3. Natural Gas Mode: Similarly, when the generator is set to run on natural gas, the carburettor adjusts the air-to-fuel mixture to utilize this cleaner-burning fuel source.

Advantages of Dual Fuel Carburettors for Portable Generators

  1. Cost Savings:
    • Reduced Fuel Costs: One of the primary advantages of dual fuel carburettors is the significant reduction in fuel costs. LPG and natural gas are generally less expensive than petrol, and their prices tend to be more stable over time, reducing the impact of price fluctuations on your energy expenses. Savings between 30% and 60% over the price of petrol can be anticipated depending on the load placed on the generator.
    • Extended Run Times: Dual fuel generators can run for longer durations on a single tank of LPG or natural gas compared to petrol. This extended runtime is especially valuable during power outages, ensuring a continuous power supply without frequent refuelling.
  1. Environmental Benefits:
    • Lower Emissions: LPG and natural gas produce fewer emissions compared to petrol. They release fewer harmful pollutants such as carbon monoxide (CO), nitrogen oxides (NOx), and particulate matter. This is essential for reducing the carbon footprint and improving air quality.
    • Compliance with Regulations: Using cleaner-burning fuels can help meet environmental regulations and emission standards, ensuring that your generator operates within legal limits.
  2. Reduced Maintenance Costs:
    • Cleaner Engine: LPG and natural gas result in cleaner engine operation. They leave fewer carbon deposits in the engine, reducing the need for frequent maintenance and extending the generator’s lifespan.
    • Fewer Carburettor Issues: Traditional carburettors in petrol generators can get clogged over time due to varnishing and residue buildup. Dual fuel carburettors are less prone to these issues, minimizing maintenance and repair costs.
  3. Fuel Supply Versatility:
    • Redundancy in Fuel Sources: During emergencies or natural disasters, having the ability to switch between different fuel sources offers a critical advantage. If petrol is scarce or unavailable, you can still power your generator with LPG or natural gas.
    • Easier Storage: LPG and natural gas are stored in sealed tanks, making them less prone to spillage, evaporation, or contamination, which is common with petrol storage.
  4. Quiet Operation:
    • Reduced Noise Levels: Generators that run on LPG or natural gas tend to operate more quietly compared to petrol -powered generators. This is particularly beneficial for residential areas and settings where noise pollution is a concern.
  5. Fuel Availability:
    • Wide Availability of LPG and Natural Gas: LPG and natural gas are widely available and can be delivered directly to your location. This accessibility adds to the convenience of using dual fuel generators.


The adoption of dual fuel carburettors for portable generators represents a significant step forward in achieving more cost-effective, environmentally friendly, and versatile power solutions. By allowing generators to operate on both petrol and cleaner-burning fuels like LPG and natural gas, users can enjoy substantial cost savings, reduced emissions, and increased reliability, all while contributing to a greener and more sustainable future. Dual fuel generators are a compelling choice for homeowners, businesses, and communities looking to meet their power needs while minimizing their impact on the environment. As technology continues to advance, the use of dual fuel carburettors will likely become even more accessible and efficient, making it an increasingly attractive option for powering homes and businesses.




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One Comment

  1. Angus Clarke 27th October 2023 at 09:24 - Reply

    Excellent Article. I have done this conversion for a few people. They’re very happy with the results.

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