Increasing autonomy is a key challenge for any hydraulic motor that goes on a long hike or fishing trip for a few days. Standard 12 or 25 liters that offers a range of water-powered engines. Yamaha or Tohatsu As a basic setup, it's often a disaster when you use powerful two-stroke engines, which is why installing an extra tank becomes not just a whim, but a technical necessity for a comfortable rest on the water, you will no longer depend on gas stations on the shore and you will be able to devote full time to fishing or exploring the water area.
But simply buying a larger capacity is only half the battle. Integrating a new fuel system properly requires understanding the physics of processes, safety rules, and how carburetor or injector systems work. Incorrect insertion can lead to air suction, engine power loss, or even a fire hazard. In this article, we will take a closer look at how to turn your boat into a real long-range boat.
Calculation of the required volume and choice of the type of capacity
Before you go to the store for the can, you need to make accurate calculations, so as not to overpay for extra liters and not take up useful space in the cockpit. Fuel consumption depends on the engine speed, propeller and loading of the boat. boat-engine It consumes about 10 liters per hour at cruising speed, and you plan to be in the water for 8 hours, you only need a regular tank for a couple of hours. You need a capacity of at least 60-70 liters, taking into account the supply.
There are two main types of designs: rigid tanks made of cross-linked polyethylene and soft fuel bags. Watski or NorPoleThey are more durable, shape-shifting and often equipped with built-in fuel level indicators, ideal for permanent installation in the haunches or under the seats, soft tanks are lighter, take up less space when transported on the trailer, but require more careful handling and protection from sharp edges inside the boat hull.
It is important to consider not only the litre, but also the dimensions of the product. The tank should freely pass through the hatches or trawler of your boat if you plan to remove it for refueling or maintenance. You should also pay attention to the presence of an observation window or the possibility of installing a level sensor, since it is impossible to determine the balance of fuel in a dark container by eye.
Technical requirements for materials and construction
The fuel system is a high-risk zone, so the materials used to make the tank must meet strict standards, including resistance to aggressive gasoline and oils, as well as ultraviolet radiation. Cheap plastics can become brittle over time or swell up by changing geometry and damaging fasteners. Quality tanks are made from high-density polyethylene (HDPE) with additives that prevent fuel vapor diffusion.
There is often a partition inside the structure that extinguishes the splashing of fuel (the "slashing" effect), which is critical for the stable operation of the engine on the wave. If the fuel is actively splashed, air bubbles can enter the mainline, which will lead to unstable operation of the engine. In addition, the neck must have a reliable sealed cover with a pressure relief valve to prevent the extrusion of vapors when heated in the sun.
⚠️ Warning: Never use conventional water-based plastic canisters or process liquids to store fuel! They have no antistatic protection and can dissolve with gasoline, leading to fatal consequences on the water.
Another important element is the fuel intake inside the tank, which must be equipped with a mesh filter of rough cleaning, which prevents debris and condensate from entering the fuel main. Some modern models are equipped with a multi-stage filtration system at the exit, which prolongs the life of the carburetor or fuel pump injector.
Connection schemes: serial and parallel connection
There are two main ways to integrate the extra capacity into the boat's fuel system: the first is a serial connection, where an additional tank is installed in front of the main one, in which case the fuel is first consumed from the external tank, and then the motor automatically switches to the regular tank, which is the simplest and most common method, which does not require complex manipulation of the cranes during the movement.
The second option is a parallel connection using a fuel separator or tee, which allows the fuel to be consumed from both tanks simultaneously, which ensures better weighting of the boat and stability on the course, but this scheme requires the installation of additional back pressure valves so that fuel does not flow from one tank to the other by chance, creating the risk of overflow through the neck.
Nuances of the operation of the reverse valves
In parallel, it is important that the pressure in the main line is the same, so if one tank is higher than the other, the fuel will leave the bottom one first until the levels are equal, or vice versa, depending on the design of the valves.
To implement any scheme, you will need high-quality fuel hoses with markings. USCG Type A1They're reinforced and they don't let the fuel vapor out, and the normal transparent hoses don't fit in, and don't forget the adapters and fittings, which are made of brass or stainless steel that's resistant to seawater.
Instructions for installation and installation of the system
The installation of the additional tank requires precision and adherence to technology. First, you need to determine the location of the installation. The tank must be fixed rigidly to prevent it from moving or hitting the wave. The attachment uses special belts with quick-removal buckles or metal brackets with a rubber pad to prevent plastic from friction against the boat hull.
The fuel line is then laid. The hose should not have cracks, inflections or tension. It is recommended to use corrugated protection for areas passing through sharp metal edges or hatches. All connections should be tightened with stainless steel clamps. After assembly, the system should be checked for leakage by pumping a pear and visually inspecting the joints for leakage.
☑️ Check before the first launch
If you install a tank inside a hazelnut, make sure you have ventilation in this compartment, and the vapors are heavier than air, and can accumulate at low points, creating explosive concentrations. In some cases, it makes sense to install a gassing sensor of the hold, which will sound when a leak is detected.
Comparison of specifications of different solutions
To make it easier for you to choose, we have prepared a comparative table of popular types of additional containers, these parameters will help you to weigh the pros and cons before buying.
| Parameter | Hard plastic tank | Soft fuel bag | Aluminum tank (homemade) |
|---|---|---|---|
| Weight (empty) | Medium. | Low. | Highly |
| Durability | High. | Medium | Very high. |
| Protection from UV | Yeah (massively) | It needs a case. | Yes. |
| Price. | Medium/High | Low. | Depends on the execution |
As you can see from the table, plastic-tank They're the middle ground for most PVC and aluminum boat owners. They don't rust, they don't beat, they last for decades. Soft tanks are good as emergency options or for seasonal trips when you need to save space during transportation. Aluminum structures are often self-made, but that requires a high skill welder and adherence to argon welding technology.
Use silicone lubricant for rubber tank covers seals, which will prevent them from drying out and cracking under the influence of sun and salt water, keeping them tight for years to come.
Operational safety and maintenance
Operating additional fuel equipment requires the owner of the boat to be disciplined. Regularly check the condition of the fuel hoses, especially in the connection with the tank and engine. Plastic ages, cracks and may lose elasticity. If you notice that the paging pear has become rigid or sticky, replace it immediately, as this is the first sign of rubber failure.
At the end of each season, it is recommended to drain fuel from an additional tank or add a stabilizer to it if storage is planned for a long time. The remaining gasoline is oxidized, forms resins and lacquer plaque that clogs the jelly jelly carburetor. Also remember to wash the fuel filter-sludger, if it is provided by the design of your additional tank.
⚠️ Warning: Fill the extra tank only on the shore, in a well-ventilated place. Never fill the tank "to the end" in the heat - when heated, the fuel expands and can pour through the valve, creating a fire-prone film on the water surface.
Keeping these simple rules in mind will avoid most fuel system problems, and remember that you are insulated on the water, and engine failure due to a dry tank or clogged filter can make a pleasant walk a serious challenge.
A properly selected and installed additional tank increases the range of the boat by 2-3 times, turning day trips into full-fledged multi-day expeditions without the risk of being left without fuel.
Frequently Asked Questions (FAQ)
Can I connect the tanks of different manufacturers?
Yes, you can. As long as the diameters of the fittings match or the correct adapters are used, it is also important that all the components of the system (hoses, fittings) are compatible with gasoline and do not create resistance to fuel currents that exceed the capabilities of the engine fuel pump.
Do I need to raise the extra tank above the main one?
When connected in series, an additional tank is usually placed next to the engine or on the stern, connecting the hose to the main tank, which is located on the lower unit. It is not necessary to raise it higher if you use a regular pear of paging. However, if the tank is below the level of the carburetor, the pumping can take longer.
How does the extra weight of the tank affect the boat’s driving performance?
A full 60-liter tank weighs about 45 kg. This is a significant additive that can affect the differentiation of the boat. It is recommended to place the heavy tank closer to the center of gravity (CG) of the boat or on the opposite side of the driver to compensate for roll. In small boats, this can reduce the maximum speed by 1-2 km / h.
Can I store a tank of gasoline inside a closed hazelnut?
It is strongly recommended not to store the fuel tank in a fully sealed, unventilated runduk. Gasoline vapors should have an outlet. If the tank is removable, it is better to store it outside the boat in a special ventilated box or in a room for fuel.