Find the right 20-gallon gas tank for your pontoon by comparing capacity, venting, gauge features, and mounting style. This guide highlights five solid choices that balance capacity with portability and reliability. Best for extended runs between fuel stops, or for pontoon setups that need a higher-capacity tank without bulky bulkheads. The top picks emphasize gauge visibility, venting safety, and compatibility with common marine fittings.
| Product | Capacity | Best For |
|---|---|---|
| Scepter 12 Gallon Portable Boat Gas Tank (08668) | 12 gal | Boaters needing built-in gauge and a compact profile for tight spaces |
| VEVOR Marine Tank | 14.53 gal | Those wanting a larger capacity with a visible fuel gauge |
| Attwood 12 Gallon Portable Marine Fuel Tank (8812LPG2) | 12 gal | Pontoon setups needing automotive-grade construction and gauge |
| Scepter 08669 Rectangular 12 Gallon Low Profile | 12 gal | Low-profile installations with easy transport |
| Moeller Topside Fuel Tank (22 Gallon) | 22 gal | Highest capacity on topside mounting for larger pontoon rigs |
Scepter 12 Gallon Portable Boat Gas Tank, 08668
The Scepter 12-Gallon Portable Boat Gas Tank provides a compact yet ample capacity for longer boating sessions. Its built-in fuel gauge helps monitor levels at a glance, and a 2-way vented cap manages vapor pressure during refueling. The design supports diesel and ethanol-blended fuels, increasing compatibility for mixed-fuel boats. Best for boaters who want a reliable, gauge-equipped tank without occupying excessive space.
Who it’s best for: Pontoon operators needing a balance of capacity and a built-in gauge in a compact footprint. Why selected: It combines eye-level fuel reading with a space-saving profile and a vented cap for safer refueling. Caution: Ensure you have the correct fuel line compatibility (sold separately) and standard 1/4 NPT fittings for your setup.
VEVOR Marine Tank, 14.53 Gallon
This 14.53-gallon marine tank pairs a clear fuel gauge with a visible level indicator, helping you track consumption during trips. It includes a long 9.8 ft fuel hose and a 0.3″/8 mm inlet/outlet, designed to minimize spillage during connections. Best for boaters who want a larger capacity without sacrificing gauge visibility. Caution: Avoid prolonged direct sunlight to prevent material aging and expansion.
Who it’s best for: Pontoon owners who need more range than a 12-gallon tank and value a built-in gauge. Why selected: Higher capacity paired with a visible gauge and a robust polyethylene body. Caution: Hose compatibility is Yamaha-focused, so confirm your motor’s fittings before purchase.
Attwood 12 Gallon Portable Marine Fuel Tank, Gauge
Attwood’s 12-gallon portable fuel tank emphasizes automotive-grade multi-layer construction built to endure harsh marine conditions. It includes an automatic vacuum valve, ensuring steady fuel flow without manual venting. Best for pontoon setups that require reliable fuel delivery and resilience to temperature swings. Caution: The gauge is useful, but verify venting and cap compatibility with your ventilation system.
Who it’s best for: Pontoon owners seeking durable construction plus automatic venting for consistent fuel supply. Why selected: Strong, multi-layer design and built-in vacuum valve simplify operation. Caution: Some installations may require additional fittings or adapters for perfect fit.
Scepter 08669 Rectangular 12 Gallon Low Profile
This low-profile 12-gallon tank from Scepter offers a compact shape with the same built-in gauge and 2-way vented cap as larger models. It is ideal for pontoon boats that have tight spaces under benches or near walkways. Best for space-constrained installations where visibility of fuel level matters. Caution: Check overall height to ensure it clears storage and mounting brackets.
Who it’s best for: Pontoon owners needing a slender, high-compatibility tank with gauge. Why selected: Space-saving design without sacrificing gauge utility. Caution: Limited to 12 gallons—not ideal for long boating days without resupply.
20 Gallon Fuel Cell Aluminum Tank (Parts-Diyer)
This aluminum 20-gallon tank offers a larger, flat-seating design with a level sensor and quick-release cap. Its aluminum construction provides added protection and light weight, suitable for performance-minded vessels. Best for pontoon boats needing maximum capacity with a straightforward install. Caution: Aluminum tanks require proper corrosion protection and mounting considerations in marine environments.
Who it’s best for: Pontoon owners seeking the highest fuel capacity in a compact aluminum tank. Why selected: Combines 20 gallons with a level sensor and quick-release cap for easy checks and refills. Caution: Aluminum tanks may need additional protective coatings depending on water exposure.
Moeller Marine 031626 Topside Fuel Tank, 22 Gallon
Moeller’s 22-gallon topside tank is suited for boats that mount fuel above deck. It emphasizes rotationally molded, UV-stabilized poly construction and is designed for topside mounting on boats built before 2011. Best for pontoon rigs needing a larger-capacity topside solution with sturdy, UV-protected materials. Caution: Designed for older boat configurations; verify compatibility with newer hulls or mounting locations.
Who it’s best for: Pontoon boats seeking a larger topside fuel reservoir with durable construction. Why selected: Extra capacity and proven Moeller engineering for topside installs. Caution: Not ideal for newer hull designs where space or mounting interfaces differ.
Buying Guide: Key Purchase Considerations
- Capacity vs. space: For longer trips, higher capacity tables are attractive, but ensure your pontoon layout can accommodate the tank’s dimensions.
- Gauge visibility: Tanks with built-in gauges help you monitor fuel levels without guesswork. Consider how the gauge reads (gas level, compatibility with your fuel type).
- Venting and safety: A vented cap reduces vapor buildup during fueling. Look for two-way venting options that stop dangerous pressure spikes.
- Material and durability: Plastic tanks resist corrosion but can age in sun; aluminum tanks are lightweight and strong but require protection against galvanic corrosion.
- Fittings and compatibility: Check hose length, inlet/outlet diameter, and whether the tank supports your boat’s existing fittings (1/4 NPT, Yamaha connectors, etc.).
- Mounting location: Topsides, under-seat compartments, and dedicated fuel bays affect choice. Low-profile designs help in compact spaces.
- Maintenance and accessibility: Look for easy-to-clean interiors and simple cap designs for quick fuel checks and refills.
FAQ
- What is the safest type of fuel tank for a pontoon boat?
Tanks with vented caps and built-in gauges, plus materials resistant to fuel permeation, are generally safer and easier to monitor. - Can I use any 12-gallon tank on a pontoon boat?
It depends on mounting space and fittings. Ensure the tank’s dimensions, cap type, and hose connections fit your pontoon layout. - Is a larger tank always better for a pontoon?
Not always. Consider the available deck or under-seat space and how often you refuel during trips to avoid excess weight and complexity. - Do built-in gauges require maintenance?
Built-in gauges are typically maintenance-free, but verify that the gauge reading remains accurate after installation and during operation. - What should I check before buying a topside 22-gallon tank?
Check compatibility with your boat’s mounting points, cap venting options, and whether the interior is UV-stabilized to resist sun exposure. - Are aluminum tanks better than plastic for pontoon boats?
Aluminum tanks are lighter and rugged, but require corrosion protection in certain marine environments; plastic tanks resist corrosion but may age with sun exposure.