
Cleaning a Coleman fuel tank is an important task to keep it in good condition and ensure its longevity. The process involves several steps, including emptying the tank, rinsing with clean fuel or a suitable chemical cleaner, addressing any rust or corrosion, and proper storage. It is recommended to clean the tank whenever it is dirty and at the end of the camping season. Additionally, transferring fuel back into the fuel can and regular oiling of the pump cup are crucial for maintaining fuel flow and preventing blockages. Proper cleaning products and techniques are essential to avoid damaging the tank, and users should be cautious when handling chemicals and flammable substances.
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What You'll Learn

Empty the tank and rinse with clean fuel to prevent sediment
Emptying and rinsing your Coleman fuel tank with clean fuel is an important step in maintaining your lantern or stove. This process helps prevent sediment and moisture accumulation, which can lead to operational issues and rust formation.
Firstly, it is essential to empty all the gasoline from your fuel tank. This step should be performed occasionally, especially if the lantern will not be in use for several weeks. By doing this, you can prevent gum and varnish accumulation inside the tank.
After emptying the tank, it is good practice to refill it with clean, fresh fuel. This simple action helps in rinsing away any remaining residue and ensures that your lantern or stove operates optimally. Additionally, it helps to prevent the buildup of sediment or moisture, which can cause operational problems and rusting, especially if the lantern is not used for extended periods.
If you notice any signs of rust, it is crucial to address this issue promptly. Rust can eventually destroy the fuel tank and render your lantern or stove unusable. In such cases, you may need to consider using specific rust removal methods or seeking professional advice.
To further enhance the cleaning process, some users recommend adding a small amount of lacquer thinner or fuel line cleaner to the tank after emptying it. This additional step can help dissolve stubborn residue and ensure a more thorough cleaning. However, always exercise caution and refer to the manufacturer's guidelines when using any cleaning chemicals.
By following these steps and regularly emptying and rinsing your Coleman fuel tank with clean fuel, you can effectively prevent sediment buildup and maintain the optimal functioning of your lantern or stove.
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Use rust remover, vinegar, or CLR to remove rust
If your Coleman fuel tank has rust, you can use rust remover, vinegar, or CLR to remove it. First, disassemble the appliance to make cleaning easier. Rustolium rust remover liquid and gel are both popular options and can be purchased at Walmart for $4 per gallon. Alternatively, plain distilled white vinegar can be used, which is even cheaper at $4 per gallon at Walmart and less at the dollar store. Vinegar can also be used to clean the valve, but it should be brushed on rather than submerging the valve to avoid damaging the graphite packing inside. To use vinegar for cleaning bare metal, create a mixture of 1 cup of vinegar and 1 tablespoon of salt, heating it to near-boiling. Submerge the parts in this mixture for an hour or more, then rinse them in warm water and brush them with a stiff brush. Repeat this process as needed, and finish by applying a light coat of oil, Vaseline, or WD-40, rubbing with 0000 steel wool. If you are looking for a faster option, naval jelly (a combination of phosphoric and sulfuric acid) can be applied with a toothbrush and rinsed off after 15-30 minutes. This method, however, will ruin paint.
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Use an alcohol-based cleaner, like HEET, to flush the tank
Flushing your Coleman fuel tank with an alcohol-based cleaner is an effective way to clean it. This method is particularly useful for liquid gas stoves and lanterns that have been left in storage for long periods. It is also a good way to clean stove and lantern fuel tanks.
Firstly, empty your stove or lantern fuel tank completely. Do not save the fuel unless you plan to filter it and put it in your lawnmower. Next, pour in an alcohol-based automotive fuel line cleaner like HEET. Avoid using drugstore alcohol as it contains water. Pour in around a quarter of a tank of HEET, swirl it around inside your stove or lantern, and let it sit for 20 minutes. You will likely notice some solid bits and pieces coming out of the tank.
After 20 minutes, empty the cleaner from your stove or lantern. Add some more HEET, pump up the tank, and open the valves so that the alcohol runs through the unit and out of the portals in liquid form. This process will flush the tank and ensure that it is thoroughly cleaned.
For an extra cleaning step, you can add a mixture of liquid carburetor cleaner and Coleman stove fuel after flushing with HEET. This step is particularly useful for addressing moisture accumulation inside the fuel tanks, which can lead to rusting. Use a blend of 20% carburetor cleaner and 80% Coleman Fuel, enough to fill the tank about a quarter full. Run this fuel mix in your stove or lantern as you would normally, burning it completely. Then, fill your lantern or stove with clean fuel.
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Clean the outside with car wax and a soft toothbrush
To clean the outside of a Coleman fuel tank, you can use car wax to give it a nice shine. First, spray a small amount of cleaner into a rubbing compound to make it easier to spread. Then, rub the tank as you would your car, avoiding any decals as acids can burn your skin. Once you have finished rubbing the tank, remove the compound with a clean, dry rag. If it has dried and is difficult to remove, spray it with cleaner to loosen it up.
After this, you can apply car wax to give the tank a nice shine. Use a soft toothbrush to remove the wax, being careful to avoid the decal. This method is also useful for removing an imprinted logo on the fount. Always exercise caution when using chemicals and read the manufacturer's warning labels before use.
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Store in a plastic bag to prevent insect infestations
After cleaning your Coleman stove or lantern, it is important to store it properly. Place the appliance in a plastic bag and seal it with a twist tie. This prevents spiders or other insects from crawling into the unit, which can block the fuel and airflow. For liquid fuel appliances, transfer any remaining fuel from the tank back into the fuel can. This prevents a lacquer buildup on the tank's fuel tube, which can restrict fuel flow to the generator and burner.
Before storing your Coleman stove or lantern, it is important to clean it whenever it is dirty or after a spill or boil-over that causes buildup. Under most conditions, appliances can be wiped out with warm water and dishwashing soap and then dried. For a deeper clean, you can remove specific parts and check for debris or food residue.
When it's time to take out your appliance after storage, remember to oil the pump cup on the tank's pump plunger at least twice a year with a light machine oil. This ensures that the pump will work smoothly and push air into the tank properly.
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