
There are several ways to make a temporary fuel tank. One method is to use a spare fuel jug or a milk jug with a petcock, a valve, and a hose barb, connected to the fuel pump with a hose. Another option is to use a gas tank from an old lawn mower, which already has a manual petcock. A creative solution is to use a one-liter pop bottle and some fuel tubing, which can be wired to the steering wheel to control the flow of fuel. It is important to note that the chosen container should be made of materials that are safe for fuel contact and that any spilled fuel is given time to evaporate.
| Characteristics | Values |
|---|---|
| Container | Soup can, pop bottle, milk jug, clothing detergent container, motor oil bottle, gas can, mower tank, boat fuel tank, metal can |
| Accessories | Fuel tubing, barbed fitting, rubber washer, fender washers, polyurethane gas line, petcock, fuel pump, hose |
| Considerations | Ensure container is rated for fuel, hang tank securely to avoid spills, plug vacuum line, block off return |
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What You'll Learn

Using a milk jug
Milk jugs can be used as temporary fuel tanks, but it is important to note that this is not recommended by many due to safety concerns. Milk jugs can dissolve in gas, and gasoline can eat through the bottom of the jug. If you are looking for a short-term solution in an emergency, a milk jug could work, but it is better to use a proper fuel canister.
If you do decide to use a milk jug, it is important to take certain precautions. Firstly, ensure that the milk jug is made of PVC, as this material is not adversely affected by fuel. However, it is important to note that PVC can build up static, which could be a concern if there is a risk of gasoline and static sparks. Additionally, make sure that the jug has a vented cap to prevent pressure build-up, as gasoline is highly volatile and can rapidly build up pressure at temperatures over 40°F.
To create a temporary fuel tank from a milk jug, you will need to drill a hole in the jug and insert a barbed fitting, a rubber washer, and some fender washers. You may also need to use RTV to ensure a seal around the fitting. You can then hook up a hose to the barbed fitting and connect it to your fuel pump.
It is important to use caution when handling gasoline and to ensure that there are no sparks or open flames nearby. It is also crucial to properly label the milk jug to avoid any confusion or accidental use for drinking water.
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Creating a valve and hose barb
Firstly, source a suitable container for your fuel. This could be a plastic or metal container, such as a gas can, a lawnmower tank, or even a milk jug, ensuring that the plastic is compatible with the fuel type and will not melt or dissolve.
Next, you will need to create an opening for the valve and hose barb. For plastic containers, drilling a hole of the appropriate size is recommended. However, for metal containers, welding a steel NPT coupling provides a secure base for the valve. It is crucial to ensure that the hole is properly sealed to prevent leaks. This can be achieved by using thread sealants or adhesives, such as epoxy, that are compatible with the container's material.
Now, it's time to install the valve and hose barb. Select a valve that fits securely into the opening and has the appropriate threading. A fuel valve with an o-ring seal and screws that thread into partially drilled holes in the tank might be an option. The hose barb will be attached to the valve, and this is where the hose for transferring fuel will be connected. Ensure that the connection between the valve and hose barb is secure and leak-proof.
Finally, test the setup by attaching the hose to the hose barb and turning on the fuel pump. Ensure that there are no leaks and that the fuel is transferred smoothly through the system.
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$115.5

Using a soup can
Firstly, ensure you have a suitable soup can. It is recommended to use a metal can, similar to those used for products like WD-40. Clean the can thoroughly to remove any residual soup or contaminants.
Next, you will need to create an opening for the fuel to flow in and out of the can. Carefully create a hole in the top of the can that is large enough to accommodate a standard fuel hose. You may want to consider using a barbed fitting with a rubber washer to ensure a tight seal and prevent leaks.
Now, you will need to attach a valve and hose barb to the can. Braze or weld a steel or brass NPT coupling into the hole you created. This will provide a secure connection for your fuel line. Ensure that all connections are airtight to prevent fuel leakage.
At this stage, you may also want to consider adding a fuel filter between the carburetor and the pump to help ensure that any contaminants are caught before they enter your engine.
Once your connections are secure, you can attach a fuel hose to the valve. Ensure that the hose is securely clamped to prevent it from detaching during use.
Now, your temporary fuel tank is almost ready for use. Before filling with fuel, ensure that your can is placed securely, such as on the seat of your vehicle, and that the engine is turned off and cooled down to prevent any risk of combustion.
When filling your soup can fuel tank, slowly pour the fuel into the can to avoid overflow and spillage. Only fill the can to about 95% capacity to allow for fuel expansion.
Remember to always exercise extreme caution when working with fuel, and ensure proper ventilation to prevent the buildup of dangerous fumes.
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Building an 'auxiliary tank'
Building an auxiliary tank involves some creativity and resourcefulness. Here are some detailed instructions and considerations to help you get started:
Planning and Materials:
First, determine the purpose and duration of use for your temporary fuel tank. This will influence your choice of materials and design. For example, a short-term solution could involve using a plastic milk jug, while a longer-lasting option might require a more durable container, such as a metal can or a purpose-built fuel tank.
Container Selection:
Choose a suitable container for your fuel tank. Options may include:
- Plastic bottles or jugs (e.g., milk jugs, detergent containers, motor oil bottles)
- Metal cans (e.g., soup cans, WD-40 cans)
- Fuel tanks from old lawn mowers or similar equipment
- Purpose-built fuel cans or tanks (e.g., boat fuel tanks, gas cans)
Assembly:
Once you've selected your container, follow these general steps for assembly:
- Ensure your container is thoroughly cleaned and dried to remove any residue that could contaminate the fuel.
- Modify the container by adding a valve, hose barb, and any necessary fittings. You may need to drill holes and use washers to create secure connections.
- Connect the tank to the fuel pump using fuel tubing or a hose. Ensure a tight seal to prevent leaks.
- Consider suspending the tank above the engine or securing it to a stable structure to prevent accidental spills or damage.
Safety Considerations:
- Always exercise extreme caution when working with flammable fuels. Work in well-ventilated areas, and ensure no open flames or sparks are present that could cause an explosion.
- Be mindful of the container's material and its compatibility with gasoline. Some plastics may dissolve or become brittle over time, leading to leaks or other issues.
- Ensure your temporary fuel tank has a way to turn off the gas flow to prevent accidental spills or overflow.
- Allow adequate time for any spilled gasoline to evaporate before starting your engine.
By following these guidelines and adapting them to your specific needs, you can successfully build an auxiliary fuel tank for your vehicle or equipment.
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Using a boat fuel tank
If you're looking for a temporary fuel tank for a boat, there are a few options to consider. Firstly, it is important to prioritise safety, as fuel tanks can be dangerous if not handled properly. While some people opt for makeshift solutions like milk jugs or water bottles, these are not recommended for long-term use due to safety concerns.
A safer option is to purchase a pre-made boat fuel tank. These tanks are designed specifically for fuel and can be found at various retailers, including Walmart, eBay, and marine supply stores. They come in different sizes, such as 3, 6, or 15-gallon capacities, and can be made of plastic or stainless steel. When choosing a tank, consider the space available on your boat, as some areas may not accommodate traditional long and wide fuel tanks.
Once you've selected a suitable tank, you'll need to connect it to your boat's fuel system. This typically involves using a fuel hose to connect the tank to the fuel pump or engine. Ensure that the fittings and hose are compatible with your boat's motor and fuel system. It is also important to properly vent the tank to allow fuel flow to the engine.
Additionally, consider the fuel type and any necessary treatments. For example, some boat owners choose to treat their fuel with a stabilizer to maintain its quality during extended periods of inactivity. Proper maintenance of your fuel tank and system is crucial to ensure the safety and performance of your boat.
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