Best Boat Fuel Tanks: Top Recommendations And Reviews

When it comes to choosing the best boat fuel tank, there are several factors to consider. The size of your boat and its fuel capacity are important determinants when selecting a fuel tank. For instance, a large outboard engine would require a bigger fuel tank, such as a 15 or 20-gallon tank, while a smaller boat with lower fuel consumption could opt for a more compact 3-gallon tank. Additionally, the physical space available on the deck of your boat will influence your choice of fuel tank size and shape.

Boat fuel tanks are typically made from materials like polyethylene or aluminum, with some tanks designed for portability and others for permanent mounting. Portable tanks are ideal for providing a flexible fuel source for boats of various sizes, catering to fishing trips, water sports, and recreational activities. On the other hand, permanent fuel tanks offer a fixed solution for engine fuel storage.

When selecting a boat fuel tank, it is crucial to consider the tank's durability and resilience to environmental factors. The housing, valves, and fittings of the tank should be corrosion-resistant, and the tank should be able to withstand constant sun exposure without becoming brittle.

Some of the top-rated boat fuel tanks include offerings from Attwood, Scepter, BISupply, and Moeller, with capacities ranging from 3 to 24 gallons. These tanks are known for their automotive-grade, multi-layer construction, durability, and compliance with safety standards.

Ultimately, the best boat fuel tank will depend on your unique requirements, taking into account the size of your boat, fuel consumption, available space, and the tank's construction and features.

Portable vs. permanent fuel tanks

When choosing a fuel tank for your boat, there are two main types to consider: portable and permanent. Each has its advantages and is suited to different boat types and needs.

Portable Fuel Tanks

Portable fuel tanks are designed to be easily removed from the boat and refilled at a fueling station. They are usually made of plastic and come in various sizes, from one-gallon to fifty-gallon capacity. Portable tanks are a good option for those who want flexibility and the ability to refuel their tanks on land. They are also typically more affordable than permanent tanks.

Some features to look for in a portable fuel tank include:

• A durable construction material, such as high-density polyethylene or anti-static, anti-aging, and corrosion-resistant plastic.
• An easy-to-carry design with a handle for convenient transportation and storage.
• A fuel gauge to monitor the remaining oil volume.
• Compatibility with your boat's engine and fuel system.
• EPA and CARB certification to ensure safety and durability.

Permanent Fuel Tanks

Permanent fuel tanks, on the other hand, are installed in the boat's hull and are not meant to be removed. These tanks are usually made of aluminum or plastic and can hold ten to several hundred gallons of fuel. They are typically found on larger vessels and powerboats. Permanent tanks offer a more permanent solution for those who don't want to deal with refilling portable tanks.

• Permanent tanks are usually installed by a professional, so factor in the cost of installation.
• Choose a tank material that is suitable for your boat type and fuel system. Aluminum, for example, can react with ethanol fuel additives and cause corrosion if not properly treated.
• Ensure the tank meets all relevant safety regulations and standards, including proper venting and capacity for your boat's needs.
• Consider the weight and placement of the tank to avoid interfering with the boat's balance and stability.

Both portable and permanent fuel tanks have their advantages. Portable tanks offer flexibility and convenience, while permanent tanks provide a more permanent solution with a higher fuel capacity. The best option for you will depend on your boat's size, fuel consumption, and personal preferences.

Fuel tank size

The size of the boat fuel tank you need depends on the size of your boat and how much fuel it consumes. If you have a large outboard engine, opt for a larger tank, such as a 15- or 20-gallon fuel tank. For smaller boats that don't burn as much fuel, a 3-gallon tank may be more suitable.

The physical size of the tank is also an important consideration. If you have limited space on your boat, look for slim and narrow tanks that can fit in small spaces, such as under your chair.

Portable boat fuel tanks are available in a variety of sizes, typically ranging from 3 to 12 gallons. Some common sizes include:

• 3-gallon: Suitable for small boats and kayaks.
• 6-gallon: Ideal for small fishing boats, dinghies, and other small vessels.
• 12-gallon: Balances weight and capacity, suitable for almost any boat.

You can also find larger, permanent boat fuel tanks with sizes ranging from 14 to 55 gallons or more. These are typically made of polyethylene or aluminum and are mounted below or above the deck.

Fuel capacity

If you have a large outboard engine, a 15- or 20-gallon fuel tank will be necessary to support it. On the other hand, if your boat is smaller and doesn't burn much fuel, a 3-gallon tank may be more suitable. For small vessels, a compact and easy-to-transport design is ideal, as it can be conveniently stored under a seat.

Boat fuel tanks come in a variety of sizes, including 3-gallon, 6-gallon, 12-gallon, and larger capacities like 14, 15, 22, or 24-gallon tanks. The size of the tank you choose will depend on the size of your boat, the amount of fuel it consumes, and the available space on the deck.

It's worth noting that the shape of the fuel tank is also important. If you have limited space on your boat, look for slim and narrow tanks that can fit in small places, such as under your chair. Additionally, consider the material of the tank. Plastic marine fuel tanks are lightweight, inexpensive, corrosion-resistant, and not susceptible to degradation from ethanol fuels. Aluminum tanks, on the other hand, are extremely strong and can be equipped with baffles to prevent fuel from sloshing back and forth.

Fuel tank materials

Boat fuel tanks are made from materials that can withstand extreme environments, including constant sun exposure and corrosive saltwater. The most common materials used for boat fuel tanks are polyethylene plastic and aluminium.

Polyethylene Plastic

Polyethylene plastic tanks are lightweight, inexpensive, corrosion-resistant, and not susceptible to degradation from ethanol fuels. They are available in a range of sizes and shapes to fit different boats and are suitable for both portable and permanent fuel tanks.

Aluminium

Aluminium tanks are extremely strong and durable. They can be equipped with baffles to prevent fuel from sloshing back and forth. Aluminium is resistant to rust and corrosion when kept away from moisture.

Other Materials

Some fuel tanks are made from other materials, such as steel and thermoplastic. Steel tanks were commonly used in the past but are prone to rust and leaking over time. Newer tanks made from thermoplastic polymers, such as high-density polyethylene, are becoming more common due to their ability to safely tolerate pressure buildup.

Fuel tank installation

Support Structures

When installing a fuel tank, it is important to ensure that the tank is adequately supported. Insufficient support can lead to cracks in the tank, causing fuel to leak into the bilges. This is especially important for large tanks, as the weight of the fuel can cause the tank to sag or flex, leading to structural failure. It is recommended to use a continuous shelf-like structure to support the tank rather than stringers or beams, as this minimizes flexing.

Water Drainage

Fuel tanks should be elevated above the sole or deck to allow for water drainage. This can be achieved by using spacers made of non-hygroscopic material such as prefabricated fiberglass or GPO3. The spacers should be bedded athwartships to the tank bottom using a polyurethane bedding compound. This prevents water migration and corrosion.

Corrosion Prevention

Aluminum fuel tanks, in particular, should be installed in a way that allows for adequate air exposure to prevent corrosion. All points of contact with the tank that could trap water should be eliminated. Water-absorbent materials such as wood should not come into contact with the tank, and rubber strips should be avoided as they contain carbon, which is cathodic to aluminum and can cause galvanic corrosion.

Accessibility

It is important to consider serviceability and accessibility when installing a fuel tank. All serviceable components, such as fill, vent, and supply fittings, as well as inspection ports, should be accessible and visible. Covering or sheathing the tank for cosmetic or acoustic purposes may impede the identification of leaks and corrosion.

Mounting Surface

When mounting the fuel tank, it is important to ensure that it is installed on a stable surface. The tank should be mounted on the hull stringers and never on the bottom of the hull.

Securing the Tank

The method of securing the tank will depend on the material. For aluminum tanks, 3M 5200 adhesive can be used to glue the tank in place. This creates a strong seal that can withstand the weight of the fuel.

Fittings and Connections

It is recommended to use stainless steel pipe fittings for the fuel supply to avoid galvanic corrosion. All connections should be tight and secure to prevent fuel leaks.

Frequently asked questions