
Nitro fuel left inside an RC fuel tank can turn bad and gel up, causing the fuel lines to clog. To clean gel out of a nitro RC fuel tank, some recommend using fresh fuel, shaking it up, and then dumping it out. Others suggest using denatured alcohol, which can be used to clean the exterior of the engine case and carburetor, as well as the fuel filters. Some people also use dish soap and water, although it is advised to rinse the tank with nitro fuel afterward to remove any water residue.
| Characteristics | Values |
|---|---|
| Cleaning products to use | Denatured alcohol, acetone, fresh fuel, dish soap, water, isopropyl alcohol, WD-40, brake cleaner, carb cleaner, varsol, antifreeze, nitro cleaner |
| Cleaning methods | Soak, shake, dump, rinse, repeat, dry, run the model as normal, back-flush, spray |
| Notes | Avoid using water and glow fuel together, and avoid using water in your fuel tank. Denatured alcohol and acetone should also not be used in the fuel tank. |
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What You'll Learn

Using denatured alcohol
Denatured alcohol is a great option for cleaning out a nitro RC fuel tank. It is important to note that you should never use water in your fuel tank, as water and glow fuel do not mix well together.
To start, empty the fuel tank by drawing out the leftover fuel with an empty fuel bottle. Do not place this fuel back into the can of fresh fuel, and dispose of it properly. Squeeze the bottle and insert the tip into the fuel tank, drawing out the leftover fuel. Repeat this process until the tank is completely empty.
Next, you will need to fill the tank with denatured alcohol. Fill the tank halfway to three-quarters full with the alcohol, replace the cap, and shake the tank vigorously for 20-30 seconds. Then, dump out the alcohol. Repeat this process, shaking and dumping until the tank is completely clean.
If you are cleaning the fuel filter, you can use denatured alcohol to backflush the filter, forcing the cleaning solvent through the filter in the opposite direction of the fuel flow. You can also use denatured alcohol to clean the exterior of the engine case and carburetor by blasting away grease and dirt. Use small brushes to remove stubborn particles, and then dry the engine with compressed air.
Denatured alcohol is a versatile and effective solution for cleaning your nitro RC fuel tank and engine. It is important to follow these steps carefully and wear protective gear, such as safety glasses and gloves, when working with hazardous chemicals.
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Cleaning with dish soap and water
To clean gel out of a nitro RC fuel tank, it is important to first drain the tank of any leftover fuel. This can be done by drawing out the leftover fuel with an empty fuel bottle. It is important to note that this old fuel must be disposed of properly and should not be placed back into a can of fresh fuel.
Once the tank is empty, there are a few different methods that can be used to clean it. One method is to use dish soap and water. This involves filling the tank with hot water and dish soap, such as Dawn, and letting it soak. The tank should then be rinsed and the process repeated until it is clean. Finally, the tank should be rinsed with nitro fuel to remove any leftover water. It is important to let the tank dry completely before using it again, and compressed air can be used to speed up the drying process.
Another method is to use denatured alcohol. This involves filling the tank with denatured alcohol and shaking it for 20-30 seconds. The alcohol is then dumped out, and the process is repeated until the tank is clean. It is important to shake out as much of the liquid as possible before running the model as normal.
Other methods include using fresh fuel, ISO alcohol, or an ultrasonic cleaner. It is important to note that water and glow fuel should not be used together, and that any cleaning products should be suitable for use with aluminum if the tank is made from this material.
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Applying acetone
To clean gel out of a nitro RC fuel tank, one method involves using acetone. Here is a detailed, step-by-step guide on applying acetone to clean your fuel tank:
First, remove the fuel tank from the chassis of your RC vehicle. This will give you access to the tank and ensure that the acetone solution is applied directly to the affected areas.
Next, fill the fuel tank halfway to three-quarters full with acetone. It is important to use a sufficient amount of acetone to effectively dissolve the gelled fuel and any other residue inside the tank.
After filling the tank with acetone, securely replace the cap and shake the tank vigorously for 20-30 seconds. This step ensures that the acetone comes into contact with all interior surfaces, breaking down the gelled fuel and loosening any stubborn residue.
Now, carefully dump out the acetone-fuel mixture from the tank. You may consider doing this over a sink or a designated disposal area to avoid spills.
Repeat the process by filling the tank halfway with acetone, shaking, and dumping it out again. This second round ensures that any remaining residue or gelled fuel is completely removed.
Finally, shake out as much of the remaining liquid from the tank as possible. Reinstall the fuel tank back into your RC vehicle, and you're almost ready to go!
Before starting your engine, it is recommended to run the model without fuel for a short period to ensure no liquid remains inside. This step helps prevent potential issues that could arise from running your engine with residual cleaning fluids.
By following these steps and applying acetone in a careful, controlled manner, you can effectively clean gel out of your nitro RC fuel tank, ensuring your vehicle is well-maintained and ready for optimal performance.
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Using fresh fuel
To start the cleaning process, first, empty the fuel tank by drawing out the leftover fuel with an empty fuel bottle. Do not place this fuel back into the can of fresh fuel. The old fuel must be properly disposed of. Give the bottle a squeeze before entering the tip into the fuel tank. This allows the bottle to draw in the raw fuel from the tank. Repeat this step until all the fuel is in the bottle.
Next, fill the tank with fresh fuel and shake it up. Wait a minute, then shake it again, and finally, dump out the fuel. This process should dissolve any gunk in the tank. You can also try flushing the tank with fresh fuel.
It is important to note that some people recommend using denatured alcohol or acetone to clean RC nitro fuel tanks. However, others argue that these solvents should not be used in fuel tanks. It is recommended to use common sense and choose a method that works for you.
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Back-flushing the tank
To back-flush the tank, the fuel filter needs to be accessible. This may require removing the tank from the chassis. Once the filter is accessible, the cleaning solvent can be forced through it using a fuel tube or a similar method. The solvent will flow in the opposite direction to the fuel flow, hence the term "back-flushing".
It is important to use a solvent that is suitable for use with the specific fuel tank and filter. Some solvents, such as petroleum-based solvents like WD-40, can damage the o-rings and plastic components of the tank and filter. Therefore, it is recommended to use solvents specifically designed for cleaning fuel tanks, such as denatured alcohol or nitro cleaner.
After back-flushing the tank, it is important to ensure that the tank is thoroughly dried before refilling it with fuel. This can be done by shaking the tank to remove as much liquid as possible and then letting it air dry for a period of time.
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Frequently asked questions
If the gelled fuel is still liquid and can flow, you can use denatured alcohol or clean methanol to clean your tank. If the gelled fuel is solid, you can try using hot water and soap, or acetone or denatured alcohol to dissolve the gel.
Avoid using water, as this does not mix well with glow fuel. Also, avoid using petroleum-based solvents and oils like WD40, as these can weaken the plastic of your fuel tank.
The best way to clean your nitro RC fuel tank is to use denatured alcohol or acetone. Remove the tank from the chassis and shake the liquid around for 20-30 seconds before dumping it out. Repeat this process until the tank is clean.









































