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If your boat has an outboard motor installed, you’ll need a sufficient amount of fuel to run it. Even though every motor has a small fuel tank inside, it won’t get you very far. For truly exploring the water, you’ll need to have a portable gas tank on-board.
Choosing a tank is mostly based on your motor’s fuel consumption and the space you have on the deck. To help you equip your engine with an optimal fuel source, our boat gas tank reviews will go in detail to present the best boat gas tanks with all their pros and cons.
OUR TOP PICK
Scepter 12 Gallon Red Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Made of tough UV-stabilized High-Density Polyethylene
- One-piece tank shell significantly reduces fuel evaporation
- Automatic 2-way valve releases pressure above 5 PSI
- Molded-in handles make carrying and transportation easy
Capacity: 12 gallons
Dimensions: 22.9 x 14.3 x 13.9 inches
Weight: 6.75 pounds
Fitting: 1/4-inch NPT
Safety Regulations: EPA
EDITORS CHOICE
Five Oceans 6 Gallon Portable Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Ergonomic molded handle on top
- High-contrast fuel gauge for easy level control
- Safe to use with ethanol-blended fuels
- Eco-friendly design (doesn’t vent fuel vapor)
Capacity: 6 gallons
Dimensions: 23 x 11.4 x 8.8 inches
Weight: 8 pounds
Fitting: 1/4-inch NPT
Safety Regulations: ISO 13591 IMCI (non-EPA)
BEST VALUE
Attwood 3 Gallon Portable Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Vacuum valve in the cap allows automatic venting
- Compact dimensions to easily fit into small spaces
- Multi-layer construction withstands pressure build-up
- Fully compliant with CARB and EPA regulations
Capacity: 3 gallons
Dimensions: 7.4 x 11 x 16.5 inches
Weight: 4.28 pounds
Fitting: 1/4-inch NPT
Safety Regulations: EPA and CARB
Scepter 08669 Low Profile Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Molded feet significantly improve stability
- Strong High-Density Polyethylene construction
- Combination of a fuel pick-up and level gauge
- Automatic pressure release over 5 PSI
Capacity: 12 gallons
Dimensions: 24.3 x 18.1 x 10.7 inches
Weight: 7.9 pounds
Fitting: 1/4-inch NPT
Safety Regulations: EPA
Five Oceans 3 Gallon Portable Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Compact size is perfect for smaller boats
- Meets international safety requirements
- Convenient 90-degree placement for the fuel lines
- Strong grab handle on top for easy carrying
Capacity: 3 gallons
Dimensions: 14 x 10 x 9 inches
Weight: 3.6 pounds
Fitting: 1/4-inch NPT
Safety Regulations: ISO 13591 IMCI
Scepter 6 Gallon Under Seat Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Available in two different sizes (3 and 6 gallons)
- Sight gauge for controlling the fuel level
- Two-way vented cap releases pressure when it’s too high
- Wide base with molded feet remains stable on the boat
Capacity: 3 and 6 gallons
Dimensions: 19.3 x 12.2 x 6.8 inches (3 gallons)
Fitting: 1/4-inch NPT
Safety Regulations: EPA
Moeller Seamless Portable Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Thick-walled plastic construction with impressive strength
- Rotating fuel withdrawal for more convenience in use
- Tether on the cap so it doesn’t get lost
- Covered by a two-year manufacturer’s warranty
Capacity: 6 gallons
Dimensions: 21.5 x 13.18 x 10.1 inches
Weight: 7.8 pounds
Fitting: 1/4-inch NPT
Safety Regulations: EPA, CARB, ABYC, NMMA
Moeller Sight Gauge Portable Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Sight gauge for controlling the fuel level
- Seamless wall construction for improved strength
- Fully compliant with all EPA regulations
- Equipped with a two-way safety cap
Capacity: 12 gallons
Dimensions: 24.51 x 17.76 x 10.82 inches
Weight: 9.61 pounds
Fitting: 1/4-inch NPT
Safety Regulations: EPA, CARB, ABYC, NMMA
Moeller Topside 15 Gallon Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Huge capacity makes it great for larger motors
- Fuel gauge on cap for easily checking the level
- Low profile design to save on-board space
- Cross-linked poly construction with UV-stabilization
Capacity: 15 gallons
Dimensions: 42.50 x 14.75 x 8.71 inches
Weight: 18.6 pounds
Fitting: 3/8-inch NPT x 1/4-inch NPT
Safety Regulations: ABYC/NMMA, U.S. Coast Guard
Attwood 8806LP2 EPA and CARB Certified Boat Fuel Tank
- What Makes This Outboard Motor Gas Tank Stand Out
- Multi-layer construction withstands pressure build-up
- Vacuum valve in the cap (no need for manual venting)
- Available with or without a fuel level gauge
- Fully compliant with all safety regulations
Capacity: 6 gallons
Dimensions: 9.37 x 13.25 x 19.25 inches
Weight: 5.1 pounds
Fitting: 1/4-inch NPT
Safety Regulations: EPA, CARB, ABYC/NMMA
How To Choose A Boat Fuel Tank – Buying Guide
Portability
Since you’ll need to take the tank on and off the boat, portability is very important. The tank shouldn’t be too heavy or uncomfortable to carry. It’s always a plus if the boat gas can has a handle because it makes the job a lot easier.
Capacity
Most small tanks vary in capacity between 3 and 15 gallons. While a larger tank is heavier to carry, it gives your motor a running fuel line for a longer time. The best boat gas tank will be somewhere in the middle, balancing between weight and capacity.
Size
Boat fuel tanks are usually not very compact, so you’ll need to plan where you’re going to put them. It’s ideal if you can put it somewhere out of the way (under the seat for example). For this reason, many manufacturers offer tanks in different shapes.
FAQs
Q:Â What Is A Boat Fuel Tank?
A boat fuel tank is a specially-designed container that holds and supplies fuel to your outboard motor. Depending on the boat design, there are permanent aluminum tanks (installed under the deck) and portable tanks.
Q:Â Is It Safe To Keep Full Fuel Tank On A Boat?
Yes, outboard fuel tanks are perfectly safe to keep on a boat thanks to their construction and safety features. However, we advise that you fill it up to 90% because the gas expands and it can damage the tank.
Q:Â How And Where Do I Store The Fuel Tank?
For safety reasons, most marine fuel tanks need to be stored bottom down on a flat deck surface to prevent leaks and accidents. Also, it’s a good idea to strap the tank and prevent it from moving.
Q:Â How Long Does A Boat Fuel Tank Last?
For safety reasons, most marine fuel tanks need to be stored bottom down on a flat deck surface to prevent leaks and accidents. Also, it’s a good idea to strap the tank and prevent it from moving.
Q:Â How Do You Carry More Fuel On A Boat?
You do this by packing several portable fuel tanks on the boat. Keep in mind, however, that these are often quite large and require lots of space. Also, a full tank can be pretty heavy and impact the boat's performance.
Q:Â How Does Water Get In Boat Gas Tank?
The most common way of water getting inside the tank is condensation. As a result of the differences in temperature, the vapor from the air inside the tank will condensate on the walls. If there’s too much water inside, it can potentially damage the engine.
Globo Surf Overview
Without the best boat fuel tank on your boat, the engine will quickly run dry. The quality of the tank you choose is very important, and you should make sure it complies with all the personal and environmental safety regulations.
With the help of our reviews and guide, we’re sure that you’ll be able to find the best boat gas tank that will be easy to use and provide a reliable fuel line to your engine.
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Have you tried a boat fuel tank that made it onto our list? Is it reliable and durable? How big is it? Please share with us in the comment section below.