
Marine fuel tanks are either permanent or portable. Permanent fuel tanks are usually located under the deck and aren't meant to be removed, whereas portable fuel tanks can be taken off the boat for refuelling. Portable tanks are commonly used on smaller outboard-powered boats, and can be added to extend the boat's operating range.
| Characteristics | Values |
|---|---|
| Marine fuel tank type | Permanent or portable |
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What You'll Learn
- Permanent fuel tanks are installed in the boat's hull and are not meant to be removed
- Portable fuel tanks can be easily removed and replaced when necessary
- Portable tanks are usually made of plastic and come in various sizes, from one-gallon to fifty-gallon capacity
- Permanent tanks are usually made of aluminium or plastic and can hold ten to several hundred gallons of fuel
- Hoses and primer bulbs tend to crack and develop leaks over time

Permanent fuel tanks are installed in the boat's hull and are not meant to be removed
Marine fuel tanks are either permanent or portable. Stern drive and inboard boats are equipped with permanent fuel tanks that are usually located under the deck, and are not meant to be removed. These permanent fuel tanks are one of those “out of sight, out of mind” things on your boat that are often overlooked during routine maintenance. Hoses and primer bulbs, especially those exposed to the elements, tend to crack and develop leaks over time. Permanent fuel tanks are installed in the boat's hull and are not meant to be removed. They are usually located under the deck.
On the other hand, portable fuel tanks can be taken off the boat for refuelling. You can extend your boat’s operating range by simply adding more portable tanks (within reason). When filling portable tanks, always place the tank on the ground and keep the gas pump nozzle in contact with the portable tank. Never put gas in portable tanks while the tanks are in the car or truck—static electricity can build up, creating a spark and fatal explosion.
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Portable fuel tanks can be easily removed and replaced when necessary
Marine fuel tanks are either permanent or portable. Permanent tanks are usually located under the deck and are not meant to be removed. Portable fuel tanks, on the other hand, can be easily removed and replaced when necessary. This makes them ideal for smaller outboard-powered boats. They can be taken off the boat for refuelling, and additional portable tanks can be added to extend the boat's operating range.
When filling portable tanks, it is important to place the tank on the ground and keep the gas pump nozzle in contact with the tank. This is because static electricity can build up and create a spark, leading to a fatal explosion.
Portable fuel tanks offer a convenient and flexible option for boat owners. They can be refuelled off the boat, avoiding the need to locate a fuel pump that can reach the boat. This also allows for easier maintenance and upkeep of the fuel system.
Additionally, portable tanks provide a measure of safety. In the event of a leak or other issue with one tank, it can be quickly and easily replaced with a fully fuelled backup tank. This ensures that the boat can continue operating without significant disruption.
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Portable tanks are usually made of plastic and come in various sizes, from one-gallon to fifty-gallon capacity
Portable fuel tanks are usually made of plastic and come in various sizes, from one-gallon to fifty-gallon capacity. They are used on smaller outboard-powered boats and are portable, so you can take them off the boat for refuelling. They must be filled off the boat and placed on the ground to reduce the potential for the buildup of static electricity. Once filled, they should be stored in a well-ventilated area away from the engine and electrical equipment.
When refuelling a portable tank, it is important to ensure that the boat is securely moored to the dock and that all motors are shut down. Any open flames should be extinguished, and the fuel line disconnected. It is also important to check the fuel system, including the tank, fuel line, and connectors, for any leaks. For mixed gasoline, it is necessary to alternate the addition of gas and oil as the tank is filled, ensuring that they are thoroughly mixed before reconnecting the fuel system to the motor.
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Permanent tanks are usually made of aluminium or plastic and can hold ten to several hundred gallons of fuel
Permanent fuel tanks are usually located under the deck of a boat and are not meant to be removed. They are typically made of aluminium or plastic and can hold ten to several hundred gallons of fuel. This means they are usually found on larger vessels and are more common on powerboats than sailboats.
Permanent tanks are installed in the boat's hull and are designed to be long-lasting. They are made from a variety of materials, each with unique advantages and disadvantages. For example, polyethylene tanks are rugged, marine-grade, and roto-moulded, but they can crack. Steel tanks can rust, and fibreglass tanks can develop osmosis.
Aluminium tanks are a popular choice for permanent fuel tanks due to their durability and corrosion resistance. They are also lightweight, which is important for boats as weight affects performance and fuel efficiency. Plastic tanks, on the other hand, are usually made from polyethylene, which is a strong and flexible material that can withstand the stresses of marine environments. It is resistant to impact and corrosion and is relatively inexpensive.
The capacity of a permanent fuel tank will depend on the size and type of boat it is installed in. Smaller boats with outboard engines typically use portable fuel tanks, which can hold between one and fifty gallons of fuel. Permanent tanks, on the other hand, can hold ten to several hundred gallons, with some tanks offering capacities ranging from 12 up to 82 gallons.
It is important to provide a moderate amount of upkeep to permanent fuel tanks to ensure they serve the engine well and do not strand the boat. Hoses and primer bulbs, especially those exposed to the elements, tend to crack and develop leaks over extended periods. Therefore, it is important to regularly check these components for any signs of wear and tear and replace them if necessary.
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Hoses and primer bulbs tend to crack and develop leaks over time
Hoses and primer bulbs are an essential part of a boat's fuel system, but they are also vulnerable to the elements and tend to crack and develop leaks over time. This is especially true for those hoses and primer bulbs that are exposed to the elements, such as those on smaller outboard-powered boats that commonly use portable fuel tanks.
It is important to regularly inspect your boat's fuel system for any signs of leaks or cracks, as fuel leaks can be dangerous and can leave you stranded on the water. Permanent fuel systems, in particular, are often overlooked during routine maintenance, so it is important to pay close attention to the condition of the hoses and primer bulbs.
If you notice any cracks or leaks in your boat's fuel system, it is important to address the issue as soon as possible. Depending on the severity of the leak, you may be able to repair the hose or primer bulb by patching the crack or replacing the damaged section. However, if the damage is extensive, it may be necessary to replace the entire hose or primer bulb.
To prevent leaks and cracks from occurring in the first place, it is important to properly maintain your boat's fuel system. This includes regularly inspecting and replacing any worn or damaged hoses and primer bulbs, as well as keeping the system clean and free of debris. Additionally, it is important to follow the manufacturer's recommendations for fuel type and maintenance intervals.
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Frequently asked questions
Split fuel tanks are often chosen for their cost-effectiveness, as it can be cheaper to have two smaller tanks than one large one. They also allow for more flexibility, as you can extend the boat's operating range by adding more portable tanks.
It's important to regularly inspect your fuel tank for leaks. When filling portable tanks, always place the tank on the ground and keep the gas pump nozzle in contact with the tank. Never put gas in portable tanks while they are in a car or truck, as static electricity can build up and cause an explosion.
Marine fuel tanks fall into one of two categories: permanent or portable. Stern drive and inboard boats are equipped with permanent fuel tanks that are usually located under the deck, while smaller outboard-powered boats commonly use portable fuel tanks.










































