Marine Fuel Tanks & Boat Gas Tanks
Marine Fuel Tanks for Outboard and Inboard Boats
Keep your boat ready for the water with marine fuel tanks from West Marine. Whether you're replacing a portable outboard fuel tank or upgrading a permanent fuel tank, choosing the right equipment helps support reliable fuel storage and delivery. Explore boat gas tanks, portable fuel tanks, permanent marine fuel tanks, and compatible fuel system accessories for fishing boats, pontoons, center consoles, cruisers, and other recreational vessels.
Marine fuel tanks are designed for boating applications, with construction and fittings suited to the intended fuel type and installation. Always check individual product specifications for fuel compatibility, capacity, applicable standards, and installation requirements.
Shop Marine Fuel Tanks by Type
Portable Marine Fuel Tanks
Portable boat fuel tanks provide convenient fuel storage for compatible outboard motors on smaller boats, dinghies, tenders, and other recreational vessels. Available in different capacities, these tanks may feature carrying handles, fuel connections, and emission-control components designed for portable marine fuel systems.
Modern portable gasoline tanks may operate differently from older vented designs. Learn more in our About Your EPA Certified Fuel Tank guide.
Permanent Marine Fuel Tanks
Permanent boat fuel tanks are designed for fixed installation in compatible marine fuel systems. These tanks are commonly used in larger recreational boats, including center consoles, cruisers, sailboats, and boats with inboard or permanently installed fuel systems.
When replacing an existing tank, confirm the dimensions, fuel capacity, fitting locations, mounting requirements, and compatibility with your vessel.
Explore our permanent marine fuel tanks for below-deck and other compatible fixed installations.
Flexible Marine Fuel Tanks
Flexible marine fuel tanks and fuel bladders are available for certain specialized storage applications. Compatibility varies by product, including whether a tank is intended for gasoline, diesel, or another approved liquid. Review the manufacturer's specifications carefully before selecting a flexible tank for your boat.
Marine Fuel Tank Materials
Polyethylene Fuel Tanks
Polyethylene marine fuel tanks are popular because they're lightweight and resistant to rust. Rotomolded polyethylene construction is used in many portable and permanent marine fuel tanks. Select a tank designed and approved for your intended fuel and installation, and follow the manufacturer's requirements for support, clearance, and expansion.
Aluminum Fuel Tanks
Aluminum marine fuel tanks are used in many permanent fuel system installations. Aluminum offers strength and allows tanks to be manufactured in different shapes and capacities. Proper installation, drainage, isolation from incompatible materials, and corrosion protection are important for long-term performance.
How to Choose the Right Boat Fuel Tank
Choose the Right Fuel Capacity
Consider your engine's fuel consumption, typical cruising distance, available installation space, and desired fuel reserve. A larger fuel tank can extend your cruising range, but additional fuel also increases weight and affects your boat's loading and trim.
Check Gasoline or Diesel Compatibility
Not every marine fuel tank is suitable for every fuel. Before purchasing, confirm whether the tank is approved for gasoline, diesel, or the specific fuel you intend to use. Also verify compatibility with your engine, fuel lines, fittings, and other system components.
Measure Your Installation Space
For permanent fuel tank replacement, measure the available length, width, and height, along with the location of the fuel fill, vent, pickup, and sending unit. Allow for the manufacturer's required clearances, fittings, supports, and access for inspection and maintenance.
Match Your Fuel System Components
A complete marine fuel system may include fuel hoses, primer bulbs, connectors, filters, water separators, vents, and fuel level senders. Choose components that are compatible with your engine, fuel type, tank design, and applicable marine requirements.
Shop marine fuel lines and hose assemblies or explore our fuel system parts and accessories.
Marine Fuel Tank Safety and Maintenance
Proper fuel tank installation and maintenance are essential for safe boating. Inspect accessible tanks, hoses, fittings, and connections for leaks, damage, deterioration, and corrosion. Follow the tank and engine manufacturers' instructions for fuel storage, venting, maintenance, and seasonal preparation.
Fuel system installation and repairs should follow applicable marine safety requirements. For permanent installations or modifications involving gasoline fuel systems, consider using a qualified marine technician.
When refueling, avoid topping off your tank and allow for fuel expansion according to the manufacturer's guidance. For additional tips, read 10 Ways to Prevent Fuel Spills.
Frequently Asked Questions About Marine Fuel Tanks
The right fuel tank capacity depends on your boat's engine, fuel consumption, typical cruising range, available space, and desired reserve. Consider the added weight of fuel and follow the boat and engine manufacturers' recommendations.
Inspect accessible tank surfaces, fittings, hoses, and connections for corrosion, cracking, leaks, or deterioration. Follow the manufacturer's maintenance and storage instructions. Have any suspected fuel leak or damaged component evaluated before operating the boat.
Some marine fuel tank models are approved for both gasoline and diesel, while others are designed for a specific fuel. Always verify the manufacturer's fuel compatibility specifications. Never mix gasoline and diesel or change a tank's intended fuel use without appropriate professional guidance.
Warning signs may include fuel odors, visible fuel, staining, or unexplained fuel loss. If you suspect a leak, stop operating the engine when safe, avoid ignition sources and electrical switching, and follow appropriate fuel-spill safety procedures. Have the system inspected and repaired by a qualified professional before further use.
Polyethylene and aluminum are common marine fuel tank materials. Polyethylene is lightweight and resistant to rust, while aluminum offers strength and can accommodate different permanent installation configurations. The best choice depends on the approved application, available space, fuel type, and installation requirements.
Fuel tank installation requires correct mounting, venting, fuel connections, and compliance with applicable marine safety requirements. Permanent fuel tank replacement and gasoline fuel system modifications are best handled by a qualified marine technician. Always follow the manufacturer's installation instructions.
West Advisor: Marine Fuel Tank and Fuel System Guides
Explore our West Advisor articles for additional guidance on marine fuel storage, fuel hoses, and safe refueling.
- About Your EPA Certified Fuel Tank - Understand modern portable marine fuel tanks, emission-control features, and compatible accessories.
- Selecting Marine Hoses - Learn about marine fuel hose types and selecting appropriate hoses for your fuel system.
- 10 Ways to Prevent Fuel Spills - Review practical refueling and fuel-spill prevention tips.
Shop Marine Fuel Tanks at West Marine
Find marine fuel tanks, portable boat gas tanks, permanent fuel tanks, and fuel system accessories at West Marine. Whether you're outfitting a small outboard boat or replacing a permanent fuel tank, explore marine fuel storage equipment and compatible components for dependable boating.
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