Mercury – Portable Fuel Tank 6.6 Gallon | Fuel System | UV-Protected Molded Construction | 8M0045691

Overview

Every boater has had those days when the weather is perfect, the water is calm, and the only thing that matters is staying out just a little longer. A dependable portable fuel tank helps make that happen. This Mercury Marine part feels like one of those quiet companions you don’t think about until you really need it—steady, sturdy, and ready to keep your day moving. With the 8M0045691 tank, you’ll feel that reassuring sense of control, knowing you have the fuel you need whether you’re exploring a quiet shoreline or running back across open water before sunset.

Key Features

• Six-point-six gallon portable fuel tank designed for Mercury, Mariner, and Force outboards
• High-strength blow-molded construction with UV protection
• Integrated carry handle molded into the tank for easy transport
• Includes diurnal cap and fuel demand valve
• Built-in fuel gauge for quick visual checks
• Compatible with appropriate Mercury fuel line fittings (verify with owner’s manual)
• Designed to meet 2011 EPA requirements for portable pressurized marine fuel tanks

Engine & Boat Compatibility

• Works with all Mercury, Mariner, and Force outboards that accept a standard portable fuel tank system
• Commonly used with:
  • Small fishing boats
  • Inflatable dinghies
  • Aluminum jon boats
  • Tenders and auxiliary setups
  • Lightweight center consoles
• Compatible with other outboard brands when using correct fuel line fittings (always confirm first)

Performance & Practical Benefits

A portable tank isn’t something you choose lightly. You want it to hold up against sunlight, shifting deck pressure, fuel slosh, and the occasional bump while loading gear. This tank is designed for exactly that. The blow-molded body feels solid in your hands, and the UV-protected material helps it stay dependable even after long days sitting on an open deck.

The integrated handle gives the tank a firm, steady grip when you’re carrying it across the dock or lifting it into a truck bed. You’ll appreciate the built-in gauge too—it saves you from guessing or cracking open the cap every time you need an update. The diurnal cap and demand valve work together to manage pressure and vapor properly, something you’ll notice on hot days when older tanks tend to expand or vent unpredictably.

In real use, the tank feels secure, balanced, and purpose-built. It delivers a smooth, consistent fuel supply to your outboard, helping reduce vapor lock and other mid-day frustrations. And because it’s built to Mercury’s marine standards, you can trust it to remain tight, steady, and reliable season after season.

Why Buy OEM

Choosing a genuine Mercury Marine part means you’re investing in quality that’s been engineered for the marine environment. You’re not getting a thin, generic tank that might warp or swell after a season in the sun. Mercury tests these tanks against fuel blends, UV exposure, vibration, and pressure cycles so they hold up in the real world—not just in a catalog.

With OEM, you get:

• Perfect compatibility with Mercury fuel systems
• Materials tested for long-term fuel exposure
• Safe venting and pressure control
• Better durability than many aftermarket tanks
• Peace of mind every time you head out with a full load

It’s the kind of tank you buy once and stop worrying about.

FAQ

Q1: Which engines does this portable tank work with?

Any Mercury, Mariner, or Force outboard designed for a portable fuel system. Other brands work with correct fittings.

Q2: How is it different from cheaper aftermarket tanks?

Stronger plastic, better UV protection, safer venting, and a fuel demand valve built to last.

Q3: How can I confirm it’s right for my setup?

Check your outboard’s manual for portable tank requirements and fitting style.

Q4: Can I use it in saltwater?

Yes—its materials are designed for both saltwater and freshwater environments.

Q5: Is it easy to carry and fill?

Very. The molded handle and balanced shape make transport and fueling straightforward.