Sylvie Willis
Draining a generator's fuel tank is a crucial step in maintaining the longevity of the equipment, especially if it is to be stored for an extended period. Generators are expensive, and fuel deterioration can cause costly maintenance issues, so it is important to know how to safely empty the tank. This process involves moving the generator to a well-ventilated area, accessing the fuel lines, and ensuring the fuel valve is turned off. The fuel should then be drained into an appropriate container, and the fuel line reconnected.
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What You'll Learn
Why you should empty a generator fuel tank
Generators are expensive pieces of equipment, and their proper maintenance is essential to keep them from failing during use. One of the most important maintenance practices is to empty the fuel tank before storing the generator for an extended period.
Firstly, fuel does not last forever. Gasoline, diesel, and other liquid fuels can oxidize and deteriorate over time, especially if exposed to extreme temperatures. This can cause the fuel to become stale and gummy, clogging the fuel system and engine and preventing the generator from starting. By emptying the fuel tank before long-term storage, you can avoid these fuel-related problems and ensure that your generator is ready to use when you need it.
Secondly, for generators that use gasoline or diesel, proper care is required when storing fuel to prevent deterioration of the fuel lines, pump, and other plastic or rubber parts. Even if you use a fuel stabilizer, it is still recommended to drain the tank and carburetor periodically and burn the old fuel in your car to prevent issues with the generator.
Additionally, storing a generator with an empty fuel tank can help prolong its life and avoid costly maintenance. By emptying the tank and properly disposing of the expelled fuel, you can reduce the risk of fuel-related issues and keep your generator in good condition.
Finally, safety is a critical consideration when dealing with generators and flammable fuels. By emptying the fuel tank, you reduce the risk of accidents and pollution associated with spilled fuel, especially if it comes into contact with a hot generator engine. Therefore, it is essential to follow safety guidelines and ensure the generator is off and completely cool before emptying the fuel tank.
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When to empty a generator fuel tank
Emptying your generator's fuel tank is important for the longevity of the generator and to prevent fuel-related problems. It is especially important to empty the tank before storing the generator for an extended period.
If you plan on storing your generator for over two months without use, it is recommended to empty the fuel tank. This is because the petrol in the tank can oxidize over time, becoming stale and gummy, which can clog your fuel system and prevent the generator from starting.
It is also important to empty the fuel tank if it contains ethanol, as this can cause deterioration of the fuel lines, pump, and other plastic or rubber parts. In this case, it is recommended to drain the tank each time the generator is stored, even if it is only for a short period.
Additionally, if you live in an area with a cold climate, it may be beneficial to keep your generator's fuel tank empty during the winter months. This is because fuel can thicken and become more difficult to work with in cold temperatures, making it harder to start the generator in an emergency.
However, it is important to note that there are also advantages to storing your generator with a full tank of fuel. Some people recommend leaving the tank full with a fuel stabilizer for up to one year to prevent rust and condensation in the tank. This can also ensure that the generator is ready to use in an emergency without the need to fumble with filling it during a power outage.
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Safety precautions
To ensure safety while emptying your generator's fuel tank, it is important to take the following precautions:
Work in a Well-Ventilated Area
Before starting the process, move your generator to a well-ventilated area. This will help ensure that any fumes or gases produced during the fuel-draining process can dissipate safely.
Allow the Engine to Cool Down
Let the engine cool down completely before beginning the process. This will reduce the risk of burns from hot engine parts. Touching hot engine components can cause serious injuries, so it is crucial to wait until the engine has cooled to room temperature.
Disconnect the Spark Plug Wire
Before making any adjustments to the generator, such as draining the fuel, it is essential to stop the engine and disconnect the spark plug wire. This is a safety measure to prevent accidental ignition or electrical sparks during the process.
Handle Flammable Liquids with Care
When dealing with gasoline or other flammable liquids, extreme caution must be exercised. Avoid any open flames or sources of ignition nearby. Be cautious when working around gasoline to reduce the possibility of fire or explosion.
Use Proper Fuel Containers
Always use appropriate fuel containers to collect the drained fuel. Place a container or bowl next to the generator to catch the drained fuel. Ensure that the container is large enough to hold all the fuel in the tank. Never drain fuel directly onto the ground.
Store or Dispose of Expelled Fuel Properly
After draining the fuel, store it safely or dispose of it properly. Do not leave open containers of fuel unattended, as they pose a safety hazard. If you plan to dispose of the drained fuel, follow local guidelines for hazardous waste disposal.
Refer to the Operator's Manual
Before performing any maintenance or service on your generator, including fuel tank emptying, it is important to read and understand the operator's manual. The manual will provide specific instructions and safety precautions unique to your generator model.
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Step-by-step guide
It is important to empty the fuel tank of your generator if you are storing it for an extended period, especially during the summer months, to prevent fuel deterioration. Here is a step-by-step guide on how to safely empty your generator's fuel tank:
Choose a Safe Work Area:
Start by selecting a well-ventilated location to ensure safety during the process. Make sure the generator is turned off, and the engine is completely cool before beginning any fuel tank drainage work.
Prepare a Suitable Container:
Place a suitable container, such as a fuel can or a bowl, beside the generator. The container should be large enough to hold all the fuel in the tank, typically around 5–10 gallons (18.9–37.9 litres). Do not drain fuel directly onto the ground or into bodies of water, as this can cause accidents and pollution.
Access the Fuel Lines:
Remove any plastic covers or casings that may be obstructing access to the fuel lines. Use a wrench or socket wrenches to carefully detach any bolts holding the covers in place.
Disconnect the Fuel Line:
Locate the clip securing the fuel line that does not connect to the gas tank. Carefully remove the clip, then detach the tube from the fuel valve.
Drain the Fuel:
Tilt the generator slightly so that the fuel flows towards the disconnected fuel line. Place the end of the fuel valve tube into the container and turn the fuel valve to the "On" position. Allow the fuel to drain completely. Once most of the fuel has drained, switch the fuel valve back to the "On" position to drain any remaining fuel.
Reconnect the Fuel Line:
Carefully reattach the fuel line, ensuring it is securely in place. Close the lid on the fuel tank and, if applicable, reattach any covers or plastic casings.
Locate the Carburetor:
Refer to your generator's manual to locate the carburetor. There is usually a screw on the base of the carburetor that opens the drain. Loosen this screw to allow any remaining fuel to drain into a small container placed underneath. Once the fuel has stopped flowing, tighten the screw to close the drain.
Long-Term Storage and Fuel Stabilization:
If you plan to store your generator for long periods without use, consider using a fuel stabilizer to prevent oxidation and fuel-related problems. Alternatively, you can drain and stabilise the oil before storage.
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Storing and disposing of expelled fuel
Storing Expelled Fuel:
- Fresh Fuel Storage: If the drained fuel is still fresh, you can store it for later use. Keep it in a safe and properly labelled container, away from heat sources and direct sunlight.
- Fuel Stabilization: To prevent fuel degradation, add an appropriate fuel stabilizer to your storage container. This is especially important if you plan to store the fuel for extended periods.
- Container Considerations: For smaller generators, use clean containers with airtight caps, such as Australian-certified steel or plastic containers. Steel containers can rust over time, so regular inspection is necessary.
- Climate and Storage Time: The longevity of stored fuel depends on the climate and storage time. In temperate climates, diesel fuel can last up to 12 months without additives. Warmer climates reduce this timeframe.
- Fuel Rotation: Practice fuel rotation by using the oldest fuel in your vehicle every six months and replacing it with fresh fuel. This ensures all your stored generator fuel remains fresh.
- Storage Precautions: Never store fuel inside your generator, especially gas-powered units. Generators with fuel shutoff valves are not always 100% effective. Keep the generator dry and store fuel separately.
Disposing of Expelled Fuel:
- Proper Disposal Methods: Never dispose of old fuel on the ground, in sewers, or in bodies of water. Contact your local fire department or council for guidance on responsible disposal sites.
- Disposal of Contaminated Fuel: If your expelled fuel has degraded, exhibiting a cloudy or dark texture with a sour taste, discard it properly. Do not dump it, as it is still flammable and poisonous.
- Environmental Considerations: Discharging fuel onto the ground or into water can cause accidents and pollution. Always prioritize safe and environmentally responsible disposal methods.
Remember to consult local regulations and seek guidance from relevant authorities for specific disposal instructions in your area.
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Frequently asked questions
Draining the fuel tank is crucial to prevent fuel deterioration and avoid fuel-related problems, especially if the generator will be stored for an extended period.
It is recommended to drain the tank before long-term storage, especially if the fuel contains ethanol. For regular maintenance, ensure you always have fresh, stabilized gas in the tank.
Always refer to your generator's instruction manual before performing any service. Make sure the generator is off and completely cool before draining the fuel. Choose a well-ventilated area to ensure safety during the process.
You will need a container to collect the drained fuel, such as a gas can or fuel tank. Additionally, you may require a wrench or socket wrenches to remove any covers over the fuel lines.
Locate the fuel valve and switch it to the "Off" position. Disconnect the fuel line by removing the clip and detaching the tube from the fuel valve. Place the end of the fuel valve tube into the container and tilt the generator to drain the fuel. Once most of the fuel has drained, switch the fuel valve back to the "On" position to drain any remaining fuel. Finally, reconnect the fuel line and close the lid on the fuel tank.
