10 Best Boat Fuel Tanks (Reviews Updated 2022)

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Getting your boat the best fuel tank is necessary for those who run on outboard motors. If you’re the owner of a bigger vessel, then you probably already have a built-in container installed under your deck. However, since outboard motors are also used on smaller boats, you might need to buy a tank to supply its power. Unlike bigger models, these small boats often don’t have a fuel tank.

You can choose from a variety of different designs and capacities, and getting the biggest or most expensive ones might not necessarily be the best for you. It all depends entirely on your needs and preferences. In our reviews, we try to feature a wide array of models that provides great quality and will satisfy a bigger audience. We also recommend that you check out our buying guide to give yourself an idea of how to pick the right tank for your boat.

Best Boat Fuel Tanks

Here are our picks for the 10 best boat fuel tanks.

1. Moeller Marine 15 Gallon Topside Boat Fuel Tank

Moeller Marine 15 Gallon Topside Boat Fuel Tank

This Moeller Marine tank features a 15gal fuel capacity, and its design allows for topside mounting. You’ll find that its low-profile frame makes it a bit more convenient to install in smaller spaces. However, its size is still considerable, with a 42.5″ length, a 14.75” width, and a 9.97” height. So make sure to measure your boat’s available space carefully. The fitting is crafted with aluminum, and its cap features a fuel gauge for added convenience.

Notable Features You Need To Know About:

  • Fuel gauge
  • Low-profile frame
  • Durable material
  • Large capacity
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2. Moeller Marine Portable High Profile Boat Fuel Tank

Moeller Marine Portable High Profile Boat Fuel Tank

Moeller is one of the most popular marine accessory manufacturers, and for a good reason. Their boat fuel tank is on the larger side of the spectrum, able to hold up to 12 gallons. We recommend that you only store this unit above the deck. Its material is composed of high-density PET, a sturdy plastic that’s also resistant to the elements. The cap of the tank comes with self-venting, and it meets the requirements of the EPA. Finally, in the tank bottom, you’ll find a reserve level. And you’ll also get a fuel gauge to give you better control.

Notable Features You Need To Know About:

  • Cap is self-venting
  • Durable material
  • 12-gallon capacity
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3. Moeller Portable A/D Boat Fuel Tank

Moeller Portable Ad Boat Fuel Tank

Another model made by Moeller, this tank lets you choose between a 3 and 6.5gal fuel capacity. This tank is made with tough PET, much like most models on our list. And it features a cap design that’s self-venting, offering extra practicality. The fuel fitting is set at 90°, but you can easily rotate it to make the hose attachment easier. This tank also comes with its own fuel gauge and glass lens, as well as a handle that allows for more convenient transport and carrying.

Notable Features You Need To Know About:

  • Turning fuel-assembly
  • Fuel gauge
  • Convenient handle
  • Non-corrosive material
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4. Arksen Portable Storage Boat 35-Gallon Fuel Tank With Pump

Arksen Portable Storage Boat 35 Gallon Fuel Tank With Pump


This Arksen model isn’t just your typical tank. It features a 35-gallon fuel capacity, and it’s made from very tough stainless steel. While being more substantial than the regular PET plastic, it affords better durability and protection against the elements. Fuel transfer is very convenient because of its two-way pump. This way, you can quickly fill a smaller unit or remove its contents by reversing its cranking action. The included hose is kink-free and 8ft long.

For added safety, it features a ground clamp that prevents static discharge that can damage many of your boat’s electrical components and devices. Lastly, you’re getting two rear wheels with a 10-inch diameter, front caster outfitted with brakes, as well as a handle that makes transport easy.

Notable Features You Need To Know About:

  • Steel construction
  • Portable
  • High fuel capacity
  • Two-way pump
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5. Attwood Portable 3 Gallon Boat Fuel Tank

Attwood Portable 3 Gallon Boat Fuel Tank


This Attwood unit deserves a spot on our list because of its efficient design. This tank features a multi-layer system that’s built to resist the build-up of pressure. Even if the pressure gets too much, the cap is capable of self-venting because of its vacuum valve. This 3gal tank can be installed with an NPT 1/4in fuel fitting. Lastly, this unit is compliant with EPA’s regulations. If you’re looking for an excellent tank made with durable plastic, this unit is a solid choice.

Notable Features You Need To Know About:

  • Compact size
  • Vacuum valve
  • Multi-layer system
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6. Moeller Marine 18 Gallon Topside Boat Fuel Tank

Moeller Marine 18 Gallon Topside Boat Fuel Tank


This tank features a very-high fuel capacity of 18gal and its compliant with every government safety requirement. Granted, it might cost more than you’re a regular fuel tank, the cross-link type poly construction that it sports is more than enough to justify the price. You can also mount this topside, offering more practicality. This tank’s fuel fitting is made with aluminum and has a 3/8in diameter. The sight gauge on the cap is also very convenient.

Notable Features You Need To Know About:

  • Sight gauge
  • High fuel capacity
  • Durable design
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7. Five Oceans Portable 3 Gallon Boat Fuel Tank

Five Oceans Portable 3 Gallon Boat Fuel Tank


If you don’t use up much fuel in your boating expeditions and would prefer a more compact frame, then this Five Oceans unit is a good choice. This tank’s fuel fitting is an NPT-type, angled at 90º, and has a ¼” thread. Granted, it’s not the most massive tank on our list, but it’s perfect for smaller vessels. And it’s compact frame and handle makes it easier to store and transport. It requires manual venting to prevent the buildup of pressure.

Notable Features You Need To Know About:

  • Compact
  • Handle
  • For smaller vessels
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8. STKUSA Aluminum 20 Gallon Boat Fuel Tank

Stkusa Aluminum 20 Gallon Boat Fuel Tank


A 20-gallon unit that’s meant to be a permanent boat fixture, this STKUSA tank measures at 19.75” in length, 24″ in width, and a 10″ height. It uses an AN-10 type of fuel fitting. Lastly, the manufacturer has undergone intensive testing to determine the safety of this tank, and it passes with flying colors.

Notable Features You Need To Know About:

  • Aluminum frame
  • Easy installation
  • Large fuel capacity.
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9. Five Oceans Portable 6 Gallon Boat Fuel Tank

Five Oceans Portable 6 Gallon Boat Fuel Tank


This Five Oceans unit is very affordable, and it features a very compact frame. It has a height of less than 9”, so you can easily store it in most small spaces without issue. It has a 6 gallon capacity, which is more than enough to fuel most trips. The tank has an NPT-type fuel fitting set at 90°, as well as a fuel gauge (high-contrast) located on its cap. You should know that while we’ve tested this product and found it secure, it’s not yet approved by the EPA. This tank also comes with a 1-year manufacturer’s warranty.

Notable Features You Need To Know About:

  • Compact frame
  • Fuel gauge (high-contrast)
  • Ergonomic handle
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10. Scepter Marine Portable EPA Boat Fuel Tank

Scepter Marine Portable Epa Boat Fuel Tank


This Scepter Marine model gives you two fuel capacity options to choose from (3 and 6gal). In terms of safety, the fuel tank is approved by the EPA, and it’s built using durable materials. While it does have a self-venting design, it’s not that efficient. So you might notice some slight pressure build-up. It uses a ¼” NPT type fuel fitting and it features a fuel gauge for added convenience. Lastly, its molded feet gives extra stability.

Notable Features You Need To Know About:

  • Stable design
  • EPA compliant
  • Self-venting
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Fuel tanks, surprisingly enough, have many variations to choose from. So finding the right one might prove to be an extra challenge. What size should you pick? Should you go to a self-venting unit? Our buyer’s guide below will answer all your queries.

Buyer’s Guide – Picking The Right Fuel Tank For Your Boat

Best Boat Fuel Tank ReviewsSince you’re probably set on getting your boat a new fuel tank, you need to look out for a few things. Apart from making sure that the unit you’re getting is EPA compliant, here are a few other qualities you need to consider. It all depends on your needs and preferences, so there really is no “best” tank that suits everyone.


This factor should be a top priority since you might want to purchase a tank that’s not a permanent fixture. So bringing along a compact and portable unit offers more convenience. Some boat owners prefer to take their tanks off their boats for refilling fuel, while some prefer to get a separate container, so their tanks stay in their vessels. Regardless, having a portable unit can make transport easier.


Capacity is pretty much polar opposites because you often have to sacrifice one when favoring the other. Smaller tanks will have a fuel capacity ranging from 3 to 15 gallons. However, the higher the capacity you get, the heavier the unit will be. A bigger unit might be more convenient for some because it requires fewer refills. The best tank, in our opinion, lies in the middle ground, where you can carry it on your own, but have any fuel to last you more than one trip.


A larger size correlates to a higher capacity. You need to double-check the measurements of your vessel’s available space to ensure that the tank you’re eyeing will be able to fit. We recommend that you keep your tank well away from other devices, especially ones with flammable material. A few manufacturers designed their tanks in a way that can give high capacity and a compact design. Some of these units feature low-profile frames, so you can easily store them in tighter spots.

We’ve noticed recently that most boating enthusiasts have a few queries regarding fuel tanks, so we’ve answered the most common ones below:

Frequently Asked Questions

Here are the questions frequently asked about the best boat fuel tanks.

What exactly is a boat tank, and how is it different from a standard tank?

These special tanks are specifically built to be used for marine vessels, and they hold the fuel used for your boat’s outboard motor. As you’ve seen from our reviews, you can choose between a portable or a permanent tank. Fuel tank systems for your boat need at least one portable tank (typically made from plastic or steel), a hose that features fittings that allow quick disconnection, a bulb to prime your engine, and durable straps that keep the tank in position.

Is it advisable to keep a full tank on your boat?

Yes, you don’t have to worry about any danger from having full tanks. These units are designed with safety in mind. However, we recommend that you only fill it at a maximum of 90%. Otherwise, you risk damaging the tank because of gas expansion. Luckily, most modern units nowadays have self-venting features, so you don’t have to worry about any of this. So be sure to check if the tank you want uses manual or automatic venting. For instance, Moeller units automatically release excess pressure as soon as the interior of the tank reaches a pressure of 5psi.

On another note, the fuel type you’re using can also play a big role. If your fuel contains ingredients like ethanol, you need to be more careful. This substance will absorb moisture and sink to that tank’s bottom if left for long periods unused. If the ethanol with water reaches the engine, it might get damaged. The best way to avoid any accidents is to remove your tank and take it with you when the boat is not in use.

What’s the proper way of storing a fuel tank?

The manufacturer will typically supply the necessary instructions. But in general, most tanks need placing bottom-down. After storing it, we recommend strapping it to avoid any movement. This is an added safety measure to help prevent any accidents and leaks if ever its fuel hose might get disconnected.

Larger aluminum tanks should be placed below decks, while a smaller tank is normally placed on the boat’s deck. Just place them where you find it suitable, a location that’s safe and doesn’t have any nearby flammable objects. Don’t forget to keep in mind the length of the fuel line, because many tend to forget this, so they end up not being able to reach the engine.

Boat Fuel Tank Review Conclusion

A high-quality tank will last you many years before it needs replacing. By getting yourself a reliable unit, you’re given the insurance that your safe from any accidents and mishaps. Also, getting a bad unit will end up costing you more because tanks are connected to the motor of your boat. So a faulty tank could end up damaging your motor if you’re not too careful.