Best 6 Gallon Boat Gas Tank Options: Review & Buyer’s Guide

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Going out on a boat to enjoy the breeze and the alluring sight of open seas is undoubtedly fascinating. And ruining such a moment over running out of gas is something none of us would appreciate. For that reason, we can all agree that getting one of the Best Gallon Boat Gas Tanks is a thoughtful investment.

Anytime you set sail for an adventure to the open seas, you expect nothing but a relaxing time and fun experience. After all, where is the fun in being stranded out there over gas unavailability? Of course, none.

In that case, you need a top-quality gas tank as you also wouldn’t appreciate regular damages and fast deterioration. What you need is a reliable solution and a fuel line in your vessel to bolster your confidence every time you head out for an adventure.

However, there’s a vast array of boat gas tanks out there. And picking the most suitable option for you might be strenuous. Don’t fret because we’ve got you. We’ve chosen the Best 6 Gallon Boat Gas Tanks based on capacity, features, and best usage in this guide.

We’ll also feature a buyer’s guide, answer a few burning questions, and include other relevant information regarding the same. At the end of this review, picking the right boat gas tank will be a breeze. Now, let’s get right into it, shall we?

The Best 6 Gallon Boat Gas Tanks: Our Top Picks

Moeller Marine Fuel Tank: Best Topside Gas Tank

Moeller Marine Fuel Tank

This boat gas tank from Moeller is rectangular, measuring 24.5 by 18.1 by 11.5 inches. For that reason, it makes an ideal topside boat gas tank.

It comes with a 14-gallon tank capacity but is also available in other capacities, with the largest holding up to 24 gallons. Depending on your boat’s size, pick the best capacity that suits you best. From its first impressions, this gas tank showcases a low profile. Storing it on the boat seems easy and if need be, swapping it is nothing less effortless. 

One primary selling point of this Moeller fuel tank is its visible cap. It makes it easy to estimate the fuel level by being more of a fuel gauge. This proves to be helpful to avoid running out of gas before setting sail for a boating experience.

The tank then includes a vent through which it releases any pressure building up inside the caddy. By doing so, it promotes the gas tank’s proper functionality. Besides the varying capacities, you can also get the tank in white or red. And as much as the color isn’t a significant feature, it could add some style to your boat’s structure.

Even with its size, the tank’s design is also practical for smaller boats. Its construction uses UV-protected resin, which is rotationally molded, sturdy and resistant. With its impressive adaptability to corrosive, or rather, ethanol fuels, this gas tank is a perfect asset for most boats.

As you’d expect, it also fulfills the safety requirements. Hence, you won’t have to worry about pressure building up inside the tank during your escapades. The tank’s performance is notable and makes it qualify among the best boat gas tanks out there.


  • Fuel gauge for estimating fuel levels
  • Low-profile structure
  • Durable UV-protected resin
  • Available in various capacities
  • Meets all safety requirements


  • The fuel gauge may be inaccurate at times

Quicksilver 8M0047598 Fuel Tank: Best Portable Gas Tank

Quicksilver 8M0047598 Fuel Tank

The best part about the Quicksilver 8M0047598 is how effortless it is to carry around. Besides the fitted handle, it also features an integral fuel gauge that enables you to swap or move it quickly. 

With a 3.2-gallon capacity, this gas tank cuts it among the portable options out there. It then includes a fuel line that appears to be part of the tank, making it ideal for use on the top side. So, connecting the gas tank to the boat’s engine is pretty much straightforward.

Moreover, monitoring the fuel and knowing when to top up the tank is easy, thanks to the fuel gauge, which keeps you updated. And as much as the gauge’s accuracy isn’t perfect, it’s still practical in giving you direction. 

This boat gas tank also adheres to the strict 2011 EPA standards. It provides impressive cap tightness, control and even incorporates diurnal caps, which help prevent cap leaks. Therefore, safety for you and your boat is something not to fret about when using the tank. 

The durability of gas tanks always narrows down to the resin or plastic used in making them. Luckily enough, this tank’s blow-molded construction uses high-strength materials which also feature UV protection. Hence, its durability is guaranteed.


  • Highly portable
  • Facilitates easy fuel monitoring
  • Meets EPA safety requirements
  • Uses durable UV-protected materials
  • Easy to connect with the boat’s engine


  • None

Scepter USA 6792 Duramax Flo-N-Go Fuel Caddy: Best Rolling Gas Tank

Scepter USA 6792 Duramax Flo-N-Go Fuel Caddy

If high capacity and durability are what you are looking for, the Scepter Duramax Flo’ n’ Go delivers just that. Relative to its capacity and features, the Scepter Duramax gas tank is relatively cheap. 

It boasts a high capacity of 14-gallons which translates to more boat running time. Helping its functionality are several functional valves and seals alongside a pump. The tank’s construction then features high-density propylene. As such, it’s not only resistant to dents but also dust and corrosion, making it suitable for marine, rural, and farm use.

With such a capacity and shape, you can tell that it’s not the most portable gas tank. To address this, the Scepter included two sturdy wheels, which make its transportation pretty easy. At the top of this heavy-duty caddy is a fitted handle. You can use this to wheel or carry it around.

Given the wheel provision, you’ll have to store this gas tank in an upright position in most cases. This will also facilitate the proper use of its pump in starting, restarting, and stopping the gas. The pump is automatic and will therefore help control how much gas flows into the engine.

Even so, the pump may sometimes have operating issues, which may be a result of airlocks. Be sure to rime before using it to handle such situations. It’s also an eco-friendly boat gas tank, thanks to the self-vents. They open to contain any pent-up pressures, thus preventing pollution.

On the downside, completely draining this gas tank is quite a hassle due to the tank bottom’s design. To drain any remaining fuel, you’ll need to flip the caddy upside down.


  • Two sturdy wheels for effortless transportation
  • 14-gallon large capacity
  • Self-vents which make it eco-friendly
  • An auto-pump to control the flow of gas
  • Durable and sturdy construction


  • Quite tricky to completely drain the unit
  • Wheels have quality issues

Attwood 8806LPG2S Marine Fuel Tank: Best Gas Tank for Small Boats

Attwood 8806LPG2S Marine Fuel Tank

Next is this Attwood Marine fuel tank. It’s a portable option with a 6-gallon capacity. Alongside its efficient design, this boat gas tank is only about 1lb, and hence, carrying it around for refilling will be effortless. To make its transportation further easier, it includes a handle on the side.

It then features a multi-layer, automotive-grade construction. Such a design can effectively withstand any pressure build-up that tends to arise from expanding gas. 

However, the tank itself is non-vented. That’s why to address this; you’ll need to install a ¼-inch NPT fuel fitting. The tank’s cap incorporates a vacuum valve, promoting self-venting, especially when too much pressure is inside the tank.

In terms of safety, this Attwood gas tank satisfies both the NMMA and ABYC regulations. Therefore, safety is something you won’t have to fret about when using this gas caddy. It also features a built-in fuel gauge to aid in approximating the fuel level. 

The tank uses sturdy plastic for its construction. So, if a durable boat gas tank with excellent functionality is what you are after, this unit from Attwood is undoubtedly a solid choice.


  • It weighs roughly 1lb and hence lightweight
  • Quick and easy to unmount
  • It uses durable plastic hence a sturdy construction
  • Satisfies the set safety regulations
  • Highly portable


  • The tank itself is non-vented
  • It tends to expand sometimes

Arksen 35 Gallon Portable Gas Caddy: Best Stainless-Steel Gas Tank

Arksen 35 Gallon Portable Gas Caddy

This gas storage tank by Arksen is one of a kind. It may vary from what we’re usually drawn to, but it also showcases some superb features that make it a worthy consideration. For instance, it has a 35-gallon fuel capacity to store much more gas than most counterparts.

Additionally, this unit brags a stainless-steel, rugged construction. This assures not only resistance to various elements but also durability to boot. So, if PET plastic isn’t your type of material, this gas tank may suit you best.

It then includes a dual-way pump for delivering a relatively quick and convenient means of fuel transfer. In only a few minutes, you can drain or fill smaller units. That’s right, this gas tank’s reverse cranking action is incredible.

The tank also comes with an integrated ground clamp. This feature is handy in preventing static discharge, which is potentially harmful to electrical devices and components on your boat. And at the same time, it assures your safety as well.


  • 8-feet, durable, kink-free hose
  • Convenient handle for transportation
  • Heavy-duty flat-free tires
  • Effortless to fill
  • Large capacity tank
  • Highly versatile


  • No UV-protection
  • The ties are too short

STKUSA Stark Universal 20-Gallon Fuel Cell Tank: Best Lightweight Gas Tank

STKUSA Stark Universal 20-Gallon Fuel Cell Tank

The Stark Universal gas tank excels in versatility. Besides being an ideal boat gas tank, it also suits trucks and cars altogether. 

It’s also quite outstanding in some of its features. For one, this tank comes with an open-cell foam core, a unique feature that helps prevent vapor explosion. As a result, the unit guarantees safety when in use.

As part of the package, the unit features a replaceable anti-slosh foam. In other words, it minimizes leakages or sloshing when the waters get rough or in case your boat is subjected to shock waves.

When it comes to the tank’s design as well, the Stark Universal gas tank is exceptional. Instead of using plastic like most fuel caddies, it boasts a top-quality polished aluminum construction. And other than the elegant design, it’s also highly instrumental in protecting the gas within.

With aluminum being lightweight, this gas tank is therefore effortless and lift. As such, if you have a relatively minor vessel and don’t want a heavy gas tank, the STKUSA Fuel Cell Tank is a steal. Lastly, it requires minimal maintenance and is very convenient to install as well.


  • Rust-proof aluminum construction
  • Includes an oil level sensor
  • Prevents gas starvation
  • Very lightweight
  • Large gas capacity   


  • Low-quality filler cap

Buying Guide for The Best Gallon Boat Gas Tanks

Gallon Boat Gas Tank

NMMA/ABYC Requirements

Gas is potentially hazardous by nature. Therefore, it’s principal that boat gas tanks satisfy the industry safety standards and requirements. There are two major governing bodies with authority to regulate this type of product: The National Marine Manufacturers Association (NMMA) and the American Boat and Yacht Council (ABYC).

Your fuel tank needs to have NMMA type fuel system certification in terms of performance, installation, and design. By ensuring so, you are assured of enjoyable and safe boating adventures.


Most fuel tanks have their capacity ranging from as low as 3 gallons up to 35 gallons. The more the capacity, the heavier the gas tank. Remember, you’ll have to unmount and load the tank regularly on your boat, so you should consider one that’s quite effortless to carry.

A gas tank with a bigger capacity also translates to more running time. However, there’s a high chance you need a gas tank for a relatively small boat that hardly uses much fuel. Consider an option whose capacity strikes a reasonable balance between running time and portability.


Again, gas is highly hazardous. Therefore, when designing gas tanks, all manufacturers consider safety with the utmost significance. Keep in mind that gas tends to expand when subjected to hot temperatures. 

Hence, we would advise that you only fill the tank’s capacity up to 90% to provide room for expansion and prevent spills. Having gas filled up all the way may damage the unit. To cover for any safety concerns, you must:

  • Offload the tank when it’s not needed to reduce the risk of accidents. 
  • Pick a tank that features vents on the side to facilitate pressure release 
  • Consider using fuel that doesn’t include ethanol. The reason being, ethanol tends to sink with time and may damage the bottom of the tank.

Size and Shape

You’ll also need to consider the gas tank’s size and shape. In other words, ensure the gas tank you pick fits in your boat with zero limitations. You need to check and counter-check your requirements to ensure you end up with the right tank. If your boat only holds 3 gallons of gas and has limited storage space, you can’t go buying a 12-gallon boat gas tank.

Also, understanding your engine’s consumption is vital to help you identify the correct size. If your boat consumes minimal gas, opt for a reasonable size. Understanding this will help utilize your boat’s space to avoid running out of room for other trip necessities.

Take a moment and measure the space you wish to put in your gas tank. By doing so, you’ll have a much better insight into the most appropriate gas tank shape as well. 


Gas Tank Portable

There’s a high chance you’ll sometimes have to take the gas tank on and off your vessel. As such, the tank’s portability is worth consideration. You’ll also need to consider how effortless it is to handle the tank. 

Does it include a handle to facilitate easy carrying of the unit? Are there wheels that save you the trouble of manually carrying the tank to the boat? These are ideal questions to ask if a typical portable boat gas tank is what you wish for.

While some people consider gas tank portability to be a significant concern, others don’t. Instead, they fill up smaller gas cans and use them to fill up the gas tank. At this point, the portability of the tank is a matter of individual preference.

Frequently Asked Questions

Question: How Is a Boat Gas Tank Different From a Standard Tank?

Answer: Boat gas tanks are designed for marine vessels to hold gas necessary for running their outboard motors. Most of them, such as the Attwood 8806LPG2S, are portable, while some, for instance, the STKUSA Stark Universal, can be used on a permanent setting. There are also some like the latter that are universal and can be used in trucks and cars.

Question: Is It Safe to Store a Full Gas Tank on Your Boat?

Answer: Sure. There’s hardly any danger likely to arise from storing a full gas tank. As we’ve already seen, most models design their gas tanks with safety in mind. Nonetheless, we recommend filling your fuel caddy up to roughly 90% since gas tends to expand and may damage the unit.

Question: Is There a Proper Way to Store a Boat Gas Tank?

Answer: Yes. Most manufacturers supply instructions that are necessary for tank storage. In general, however, place your gas tank bottom down and consider strapping it to reduce movement, which might cause leaks and even accidents in a worst-case scenario.

Wrapping Up

A top-quality boat gas tank will serve you many years before demanding a replacement. And therefore, getting one of the best reliable units is undeniably essential as you wouldn’t want potentially hazardous fuel leakages on your boat.

With our guide, it’s doubtful for you to make the wrong purchase. There has to be one boat gas tank from our list that meets most, if not all, of your expectations. If you still need assistance with picking a suitable unit, we recommend the Moeller Marine Fuel Tank. It boasts a medium-range gas capacity among our options, has a sturdy construction, and meets all safety requirements.

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