When choosing an additional or main fuel tank for a small craft, many owners consider the volume of 24 liters as the optimal compromise between autonomy and dimensions. Fuel tank This capacity allows you to take long walks without the risk of being on the water without fuel, but it does not overload the transom and does not occupy a critical part of the useful space in the cockpit. It is the balance of weight and energy reserve that makes this liter popular among owners of inflatable PVC boats and small aluminum boats.
But buying a 24-liter capacity isn't just a matter of volume, but you have to consider the material, the type of fuel, the compatibility with your vehicle. outboard And most importantly, safe water rules, which can lead to financial losses and a real threat to crew safety, and in this article, we'll go through all the details of these tanks.
The issue of the range often becomes decisive when planning a route. Fuel consumption In today's two-stroke and four-stroke engines, it varies, and understanding how many kilometers you can walk in 24 liters is a basic skill of a boatmaster. Let's dive into the technical details.
Materials of manufacture: plastic against aluminum
The choice of material for the 24-liter tank is in front of almost every buyer, and the market is dominated by two main types: polyethylene containers and aluminum structures. PolyethyleneThe stainless gas used in manufacturing is usually highly chemical-resistant and does not corrosion, making it ideal for salt water. Such tanks are often produced by rotational molding, which ensures no seams and high strength.
On the other hand, aluminum tanks They are traditionally considered more durable in extreme temperatures and mechanical stress, they are better shaped when fully refueled and often equipped with more massive fittings, but aluminum is susceptible to oxidation when in contact with some poor-quality fuels or water that has got inside, which requires more careful monitoring of the inner surface.
Importantly, modern plastic tanks often have a built-in fuel level indicator, which is extremely convenient to operate. Aluminum models may require a separate sensor or a transparent insert, which can become cloudy over time. Term of service Quality plastic is comparable to metal, if you follow the rules of storage.
⚠️ Warning: Never use canisters or tanks that are not labeled "Fuel Safe" or specifically designed for boat fuel for storage of gasoline. Conventional plastic may soften or react with gasoline components, which will lead to depressurization.
When choosing between materials, you should also consider the weight of the empty container. A plastic tank of 24 liters will be lighter than an aluminum counterpart, which is critical for low-power engines, where every kilogram on the transom affects the weight of the tank. plane-speedHowever, aluminum models often have a more rigid design, allowing them to be installed in niches or fastened without an additional frame.
The Hidden Benefits of Plastic Tanks
Modern crosslinked high-density polyethylene (HDPE) is not only resistant to impact, but also has the property of “shape memory”. When dented by impact on the side or berth, the material tends to return to its original state, unlike aluminum, which receives irreversible deformation.
Calculation of range and economy
One of the main questions when buying a 24-liter tank is how far you can go, and the range depends on the engine's power and operating mode. Nominal expense The engine rarely matches the real one, because the boat encounters wave and wind resistance on the water, and for accurate planning, you need to know the average flow rate of your engine at cruising speed.
Consider a rough 24-liter range table for a tank, depending on engine power and operating mode, averaged and can vary depending on boat type and load.
| Engine power (hp) | Mode of work | Average consumption (l/hour) | Working hours (hours) | Approximate range (km)* |
|---|---|---|---|---|
| 5-6 hp | Full gas. | 2.0 - 2.5 | 9.6 - 12.0 | 240 - 300 |
| 9.9 hp | Cruiser (70%) | 3.5 - 4.0 | 6.0 - 6.8 | 180 - 210 |
| 15 hp | Full gas. | 5.5 - 6.5 | 3.7 - 4.3 | 110 - 130 |
| 20 hp | Cruiser (70%) | 6.0 - 7.0 | 3.4 - 4.0 | 100 - 120 |
Note: The calculation of the power reserve is made at an average speed of 30 km / h. Real indicators depend on the hydro-aerodynamics of the boat hull, the weight of the passenger and the presence of the current.
As you can see from the table, for low-power engines, 24 liters is almost an infinite amount of time to fish for days without refueling. For more powerful engines, this volume is a good reserve or a main tank for daytime exits. stock-stock 10-15% of the tank capacity in case of unforeseen circumstances, such as wind changes or the need for maneuver.
Compatibility with outboard motors
Not every fuel tank fits any motor. The key element here is the connection system and the type of fuel mix. For two-stroke engines that run on a mixture of gasoline and oil, it is important that the tank material is resistant to the aggressive effects of oil. Modern plastics and special aluminum alloys are usually inert to such mixtures, but older tank models may have had problems with the delamination of the inner walls.
Particular attention should be paid to the type of connection of the hose. Most tanks with 24 liters are equipped with a universal connection, but there are differences in diameter and type of fixation (fast removable connectors or clamping connections). Japanese engines (Yamaha, Tohatsu, Nissan) often use standard fittings, while some Chinese or European models may require adapters. Always check the tank's completeness before buying.
Another important aspect is that there's a built-in fuel filter-sludge filter, which in 24-liter tanks is often integrated into the neck or the exit pipe, and it traps large debris and water, protecting the body from the vent. carburetor Or your engine's injector for a breakdown, and if you don't have one, you'll need to put an extra separator on the hose, which will make it more complicated.
Use fuel hoses only labeled "Low Permeation" and conventional hoses can pass gasoline vapors through the walls, not only resulting in fuel loss, but also creating explosive vapor concentrations in enclosed spaces or boat compartments.
Rules for safe operation and storage
Water safety starts with the proper operation of the fuel system. A 24-liter tank contains a significant amount of energy, and errors are unacceptable here. The first rule is to refuel only on shore or on special floating refueling stations equipped with appropriate signs. Gas on the go or near an open fire is strictly prohibited.
When you put a tank in a boat, you need to make sure it's securely fixed, and even if it seems heavy, it can shift in the wave, damage the tranberry, or worse, fall overboard with the hose connected. riggingIt is not recommended to simply place the tank on the boat floor without mounting, especially in the bow, where it can shift the center of gravity.
⚠️ Warning: Never leave the fuel tank in direct sunlight for long periods without ventilation. The thermal expansion of the gasoline vapor can create excessive pressure leading to tank deformation or pressure relief valve operation with loss of fuel.
Storing the tank in the off-season requires preparation, you need to fully generate fuel from the system or, in extreme cases, use fuel stabilizers if the tank remains full. conservation: draining residues, purging the system and storing in a cool, ventilated place in a vertical position.
☑️ Preparation of the tank for winter storage
Service and extension
Regular maintenance of the fuel system is the key to the stable operation of the engine. 24 liters tank requires periodic checks for the integrity of the body and cleanliness inside. Water in the tank is the main enemy of any fuel system, especially in winter, when it can freeze and damage the elements. tester-paste, which change color when in contact with water, or clear hoses-sludge.
Cleaning the interior is necessary if you notice the appearance of sludge or flakes. In aluminum tanks, it can be oxidation, in plastic tanks it is the result of a reaction of poor-quality fuel. Washing should be carried out with special means or pure gasoline, avoiding the use of aggressive solvents that can damage. plastic or seals.
You should also check the condition of the ventilation valve regularly, and if it gets clogged with dirt or insects, the fuel will create a vacuum in the tank, and the engine will stop receiving gasoline when it stalls on water, and simply purging the valve with compressed air will help avoid this situation. Prevention It takes a few minutes, but saves you from a long repair.
The myth of the tank's "breathing"
Many owners tightly twist the tank lid, believing that this way the fuel evaporates less. In fact, when generating fuel, air must enter. If the valve in the lid is faulty or closed, the engine will stall. Check the valve's performance by blowing into it: air must pass freely in both directions (or only inward, depending on the design).
Frequently Asked Questions (FAQ)
Can I use a 24-liter tank for a diesel outboard motor?
Technically possible, if the diameter of the filler neck and the output fitting are the same. However, diesel fuel requires more filtration and paraffinization-resistant materials. Make sure the tank is labeled Diesel Safe, as some plastics can swell from the diesel fuel.
How to properly dispose of an old plastic fuel tank?
Plastic tanks are often made of high-density polyethylene (HDPE), which is recycled, but before recycling, the tank must be thoroughly washed and all fuel vapors removed, and it is forbidden to hand over the tank with residues to regular plastic reception points due to the risk of fire.
Why does the tank blow in hot weather?
It's a natural physical process of fuel vapor expansion when heated. If the tank is sealed and the pressure relief valve is working properly, it should be pumping out the excess. If the inflation is strong and constant, maybe the valve is faulty or the tank overheats in the sun. Don't open the lid abruptly, put the pressure on slowly.
Which hose is better to choose for a 24-liter tank?
The best choice is a reinforced hose marked USCG Type A1 or ISO 7840. These hoses do not bend at low temperatures, are resistant to gasoline and oil, and have low vapor permeability. The hose length should be sufficient for comfortable maneuvering, but not excessive, so as not to create resistance to the current of fuel.
The main conclusion: the 24-liter tank is a versatile solution for small and medium boats, providing a balance between autonomy and convenience. The key to long service is the choice of quality material, regular water checks and proper fixation in the boat.