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Storing fuel safely and efficiently is crucial for boat owners, which is why we've compared the most reliable boat gas tanks on the market. Our roundup examines their capacity, material durability, and installation requirements to help you choose the right tank for your vessel.

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Reviews

Moeller 15 Gallon Below-Deck Fuel Tank

The Moeller 15 gallon fuel tank brings boat fuel management into the modern era with its rotationally molded polyethylene construction that's both lightweight and incredibly durable. The tank's thoughtful design includes a molded fill neck with Hose Tite connection and machined aluminum withdraw fitting that swivels 360 degrees for hassle-free attachment. It's worth noting that this tank comes in at 17.75 inches tall when you factor in the fill height, so make sure you've got the right space under your deck.

Moeller 32558 58 Gallon Boat Gas Tank

This durable 58-gallon fuel tank combines rotationally molded polyethylene construction with premium aluminum fittings that exceed industry tolerances. The included fill spouts and vent fittings are engineered for reliable operation in marine environments, while the tank's slim profile maximizes space without compromising storage capacity.

Moeller 55 Gallon Below Deck Fuel Tank

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This high-quality fuel tank combines excellent design with practical features that make it a wise investment for any boater. The corrosion-resistant polyethylene construction can handle both gasoline and diesel, while the molded fittings and 360° swivel fuel release make it a breeze to connect your lines. It's CE certified and meets all the right marine standards, giving you peace of mind when you're out on the water.

Moeller 27 Gallon Below Deck Marine Fuel Tank

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This durable marine fuel tank combines cross-linked polyethylene construction with ethanol and biodiesel compatibility, featuring machined aluminum fill spouts and corrosion-resistant design. At 14.5 inches long and 36.5 inches wide, it offers reliable below-deck storage while meeting ABYC and USCG regulations. The tank's included stainless steel hold down brackets provide secure installation, and its 360-degree swivel capability makes fueling connections effortless.

Moeller Topside 24 Gallon Fuel Tank

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Crafted from durable, UV-resistant polyethylene, this EPA/CARB compliant fuel tank meets stringent low-permeation standards. Its 24-gallon capacity features a 90-degree elbow for straightforward connector installation, a vented cap with sight gauge, and Moeller's "no leak" guarantee.

Moeller TANK-FUEL Below Deck Gas Tank

Crafted from rotationally molded cross-linked polyethylene, this tank pairs a generous 72-liter capacity with precise 360-degree fitting rotation for hassle-free refueling. The aluminum withdrawal fitting handles both ethanol and biodiesel, while built-in hold-down grooves keep the tank secure beneath deck. Each detail from the molded fill neck to the stainless-steel brackets conforms to the strictest marine standards, giving your boat's fuel system the upgrade it deserves.

Moeller TANK-FUEL 23 Gal Below-Deck Tank

Made from tough cross-linked polyethylene, this 23-gallon fuel tank keeps your boat's gas supply clean with its ethanol and biodiesel compatibility. The tank's clever design features a built-in machined aluminum fill fitting that swivels 360 degrees for easy connection, while rotationally molded construction lets the manufacturer create a perfectly shaped storage space without weakening the tank. The included hold-down grooves make securing the tank simple, so you can focus on your navigation and fishing instead of refueling.

Moeller Marine 29-Gallon Permanent Fuel Tank

This durable, cross-linked polyethylene fuel tank combines a 29-gallon capacity with premium fittings that exceed industry standards for both gasoline and diesel use. The tank's rotating fill spout and CE-certified components ensure a tight seal and reliable performance, while the tank's design meets all ABYC, NMMA, and USCG regulations for below-deck installations.

Boat Fuel Tank

The RDS rectangular marine fuel tank brings practical storage to your vessel with its spacious 55-gallon capacity. Made from tough aluminum with radius-bent corners, it handles both gasoline and diesel, featuring simple yet effective design elements like a 1/4-inch pickup and 1.5-inch fill port.

Moeller 19 Gallon Boat Fuel Tank

This Moeller fuel tank combines durable cross-linked polyethylene construction with precise manufacturing tolerances for reliable performance during refueling. The included 360° swivel fill fitting makes it easy to connect hoses, while the tank's 19-gallon capacity fits snugly in your boat's storage space. The transparent design lets you monitor fuel levels without lifting the tank.

Moeller 28 Gallon Fuel Tank

These tanks combine impressive durability with convenient features like 360-degree swivel fittings, making them a standout option for both gasoline and diesel use. The cross-linked polyethylene construction handles ethanol and biodiesel with ease, while the CE-certified design ensures they meet all ABYC and USCG standards. With a generous 27-gallon capacity and a one-year manufacturer's warranty, they represent a solid investment for any boat's fuel system.

Moeller 50-Gallon Below-Deck Fuel Tank

This 50-gallon fuel tank brings a big dose of below-deck convenience to your boat, with that generous capacity giving you a whole day of power at nearly full tank. The rotationally molded design handles complex shapes while the premium fittings — including that swiveling 3/8" aluminum withdraw fitting — make refueling a breeze. Compliance with ABYC, NMMA, and USCG standards means you're covered on the safety front, while the ethanol- and biodiesel-friendly construction takes care of keeping your tank in pristine condition.

Moeller TANK-FUEL Below Deck 20 Gal Boat Gas Tank

Crafted from ethanol- and biodiesel-resistant materials, this corrosion-free fuel tank meets all ABYC standards with its seamless hose connections and UV-protected design. The molded fill neck and 360-degree swivel fitting make it a practical choice for both gasoline and diesel, though no diesel return is included. At just over 43 ounces when empty, the tank's light weight won't burden your boat's design.

Moeller 22 Gallon Below Deck Fuel Tank

This 22-gallon tank, made from ethanol- and biodiesel-compliant cross-linked polyethylene, comes with a molded fill neck featuring a swivel 3/8" aluminum withdraw fitting. The rotationally molded design allows for complex shape integration, while the molded hold-down grooves and precise fitting tolerances ensure secure installation and efficient fuel flow. Conforming to all relevant marine standards, the tank includes a pre-installed sending unit and three mounting points for versatile installation options, with dimensions of 14" L x 15" W x 21" H.

Moeller Marine Below Deck Permanent Fuel Tank

This Moeller Marine fuel tank has proven itself through mixed customer feedback, with some praising its quality and installation reliability while others struggle with proper mounting solutions. The tank's compatibility with boats built before 2011 makes it a viable upgrade option for older vessels, though potential users should be prepared for varying degrees of success with the included mounting hardware.

Moeller Marine Marine Fuel Tank

This robust fuel tank combines impressive capacity with thoughtful design features like the 360° swivel poplock fitting and UV-resistant construction. Made from machined aluminum, it's engineered to handle the rigors of marine use, with ethanol- and biodiesel-corrosion resistance keeping your powerlifting diesel engines running smoothly. The compact belly tank design tucks away neatly below deck, leaving your exterior space clutter-free while providing reliable storage for your boating adventures.

FastTackle 8806LPG2S 6 Gal Marine Boat Fuel Tank

The Attwood portable fuel tank features the same high-strength material as automotive fuel systems for reliable performance. Its robust construction includes a leak-free injection-molded design and an ergonomic handle for easy transport. The ratcheting cap with automatic vacuum valve ensures proper closure and prevents water intrusion.

Buyer's Guide

Choosing the right boat gas tank is crucial for both performance and safety. These tanks must balance capacity needs with weight considerations while meeting stringent safety standards. Understanding key specifications and features will help you select a tank that fits your boat's requirements and your personal preferences.

Capacity Requirements

Select a tank with sufficient capacity to meet your fuel needs while leaving room for additional equipment and supplies. Consider factors like engine size, boating frequency, and distance traveled when determining the appropriate capacity.

Material and Construction

Liquid-welded steel tanks offer durability and reliability but can add significant weight. Aluminum tanks provide a lighter alternative while maintaining strength, though they may corrode if not properly maintained. Consider the environmental impact and potential maintenance needs when choosing a material.

Safety Features

All boat gas tanks must meet Coast Guard standards for venting, construction, and labeling. Look for additional safety features like double-walled construction, thermal protection, and automatic shut-off valves to minimize risk in case of damage or leakage.

Installation and Access

The tank's location should maximize stability and minimize movement during travel. Consider ease of fueling and maintenance when selecting a mounting location. Some tanks offer quick-release systems for easy access, while others integrate with built-in pumps and gauges for convenient refueling and monitoring.

FAQ

What materials are commonly used for boat gas tanks?

The most common materials for boat gas tanks are aluminum and stainless steel. Aluminum tanks are lightweight and corrosion-resistant, making them popular for smaller boats and portable fuel containers. Stainless steel tanks offer superior durability and resistance to corrosion, but they are heavier and more expensive than aluminum.

Some manufacturers also use composite materials likeGRP (Glass Reinforced Plastic), which combines lightweight properties with good corrosion resistance. The choice of material depends on the boat's size, intended use, and budget.

How do I determine the right gas tank capacity for my boat?

The ideal gas tank capacity for your boat depends on its size, engine type, and intended use. As a general rule, plan for a minimum of 1 gallon of fuel per horsepower per hour of runtime. For example, a 200-horsepower engine would require a minimum of 200 gallons of fuel for an eight-hour trip.

Always consider additional fuel reserves for unexpected situations, such as increased fuel consumption during bad weather or longer-than-expected travel. Many boaters carry 10-20% extra fuel capacity to account for these variables.

What safety features should I look for in a boat gas tank?

Key safety features include double-walled construction, fuel vents with flame arrestors, and fuel shut-off valves. Double-walled tanks provide an extra layer of protection against leaks and explosions. Fuel vents prevent pressure buildup and include flame arrestors to prevent backdraft fires. Fuel shut-off valves allow quick disconnect from the boat's fuel system in case of emergency.

Other important features are heat shields to protect the tank from engine exhaust and grounding straps to prevent electrical sparking. Make sure any tank you purchase meets industry standards for your specific boat type and application.

How often should I inspect my boat gas tank?

Regular inspection is crucial for maintaining safe boating practices. Check your gas tank monthly for signs of corrosion, leaks, or damage. Inspect the exterior for dents, cracks, or rust. For aluminum tanks, look for pitting or thinning, while stainless steel tanks should be checked for crevice corrosion or stress cracks.

Opening the tank for internal inspection is ideal but not always practical. If you notice any changes in appearance or performance, have a professional inspect the tank. Always inspect before each boating season and after any significant use or storage.

What should I consider when installing a new gas tank?

Proper installation is essential for both safety and compliance with regulations. Choose a location that keeps the tank away from heat sources, electrical equipment, and propeller shafts. The tank must be securely mounted to prevent movement during travel.

Check local regulations for tank placement and ventilation requirements. Ensure all connections are properly sealed and that the tank is protected from corrosion. Consider installing a fuel gauge and overflow system to monitor and prevent spills. Consult a professional if you're unsure about any aspect of installation.

How long do boat gas tanks typically last?

With regular maintenance and proper use, a boat gas tank can last 10-20 years. Aluminum tanks generally have a shorter lifespan due to corrosion, while stainless steel tanks can last much longer with proper care.

Signs that indicate it's time to replace your tank include visible corrosion, leaks, or significant wear. Even if the tank appears undamaged, it's recommended to have it professionally inspected every 5-10 years, depending on usage and environmental conditions.