When selecting a vintage outboard gas tank, look for durability, compatibility, and ease of transport. This guide compares five versatile tanks suited to classic boats, deck boats, and fishing craft. Each option is evaluated for who benefits most, potential limitations, and why it stands out for certain vessel types.
| Product | Capacity | Key Benefit | Best For |
|---|---|---|---|
| VEVOR Boat Fuel Tank | 3.17 gal / 12 L | Long hose, Yamaha-connector compatibility | Smaller outboards on fishing or deck boats |
| Scepter 9 Gallon Portable Marine Gas Can | 9 gal / 34 L | Built-in gauge, two-way vented cap | Longer runs, larger engines |
| PeakPursuit Portable Boat Tank 3 Gal | 3 gal | Dual venting, long hose | Compact setups and easy storage |
| AloneGoer 3 Gallon Portable Tank | 3 gal | Multi-layer barrier to reduce evaporation | Harsh marine environments |
| Scepter 6 Gallon Portable Marine Gas Can | 6 gal | Under-seat design with gauge | Moderate capacity with space savings |
VEVOR Boat Fuel Tank, 3.17-Gallon/12-L Marine Outboard Tank

Best for small to mid-size outboards on fishing or deck boats. This tank uses high-density polyethylene for durability and includes a 9.8 ft hose with a Yamaha-compatible connector, making fueling straightforward for Yamaha-powered craft. The compact 3.17-gallon capacity suits boats with limited storage.
- Best for: compact vessels needing easy maneuverability and reliable connection
- Why selected: strong compatibility with common Yamaha setups and durable construction
Caution: Extended sun exposure can accelerate aging and cause expansion; store in shade when not in use.
Scepter 9 Gallon Portable Marine Gas Can

A practical choice for boaters needing longer running time and built-in visibility. The 9-gallon capacity supports extended outings. It includes a two-way vented cap to manage vapor and pressure, and a built-in gauge for quick fuel checks. It’s compatible with diesel and ethanol-blended fuels, broadening fuel choices.
- Best for: longer trips on larger boats or engines
- Why selected: integrated gauge and vented cap streamline refueling and monitoring
Caution: Ensure the fuel line is properly connected (sold separately) and that vented cap remains compliant with local regulations during transport.
Portable Boat Tank 3 Gal, Outboard Marine Tank

Choose this for a compact, lightweight option with a long hose. Dual venting lets you choose between sealed and vented operation, balancing leak prevention with smooth flow. The 9.8 ft hose provides reach for boats with seating or stern storage.
- Best for: minimalists or boats with tight space
- Why selected: simple dual-venting system and universal hose length
Caution: Check for compatibility with your boat’s fuel fittings before purchasing; ensure proper hose diameter for a secure seal.
AloneGoer 3 Gallon Portable Tank

Selected for harsh marine environments. The 12L capacity uses multi-layer co-extrusion to reduce fuel evaporation and resist UV, salt spray, and corrosion. Compatible with Yamaha connectors, this tank is suited for outboards requiring steady fuel supply.
- Best for: saltwater or high-humidity conditions
- Why selected: advanced barrier technology reduces evaporation and extends life
Caution: As with all plastic tanks, avoid prolonged direct sun exposure when possible to maintain material integrity.
Scepter 6 Gallon Portable Marine Gas Can

Moderate capacity with thoughtful under-seat design. The 6-gallon tank provides a balance of storage efficiency and fuel capacity, plus a built-in gauge for quick checks. A two-way vented cap helps manage pressure during refueling.
- Best for: boats needing a space-saving option with gauge visibility
- Why selected: under-seat design optimizes storage without sacrificing capacity
Caution: Ensure the vented cap is used correctly and inspected regularly for seal integrity.
LAUCO Portable Marine Fuel Tank—6.34 Gallons

Best for boaters seeking higher capacity with strong leak prevention features. This tank uses a sealed/vented cap with a long 9.8 ft hose and a 0.3″/8 mm inner diameter. The heavy-duty construction resists aging and corrosion, with sunlight precautions recommended.
- Best for: boats needing more fuel on longer trips
- Why selected: robust construction and dual-cap system reduce spillage
Caution: Prolonged sun exposure can age the material; store in shade when possible.
6L Portable Boat Tank 3 Gal

Best for under-seat storage on compact yachts and deck boats. The 9.8 ft hose and level gauge facilitate easy refueling and monitoring, while the sturdy HDPE design provides resistance to aging and impact.
- Best for: space-constrained vessels needing a compact fuel tank
- Why selected: combination of hose length and accessible gauge for quick checks
Caution: Verify gasket integrity and ensure the hose connection remains tight to avoid leaks during transport.
Buying Guide: Key Considerations For Vintage Outboard Gas Tanks
Capacity and size should match your typical voyage length and boat size. Hose length and compatibility with your engine connectors simplify installations. Consider venting options to manage pressure and minimize vapor, along with built-in gauges for quick fuel level readings.
Material and construction impact durability in salt spray and sun exposure. Look for HDPE or multi-layer barriers to reduce evaporation. For frequent transporting, choose a tank with a comfortable handle and a design that fits under seating or storage compartments.
Compatibility matters: check connectors and fittings for your specific outboard motor model. If you own multiple boats, a modular or semi-universal tank may save time and money.
FAQ
- What capacity should I choose for long trips? Choose larger tanks (6–9 gallons) for longer runs between refueling.
- Are vented caps mandatory? Vented caps help prevent vapor buildup and permit smoother refueling; follow local fuel regulations.
- Is a built-in gauge important? A built-in gauge speeds fuel checks and reduces guesswork during trips.
- Can these tanks handle ethanol blends? Many are designed to support ethanol-blended fuels; verify compatibility with your fuel type.
- Are these tanks suitable for saltwater boats? Yes, many models use UV-stabilized, corrosion-resistant materials for marine use.