Mercury – Fuel Cap Assembly | Portable Fuel Tank Components | Durable Marine Polymer | 8M0060029

Overview

Ask any boater, and they’ll tell you that reliability isn’t just about the big parts. It’s often the small, everyday pieces of equipment that make or break a smooth day on the water. A secure fuel cap gives you that steady confidence that your tank is sealed, protected, and ready for whatever the day brings. The Mercury Fuel Cap Assembly (8M0060029) is one of those quiet essentials — simple, sturdy, and built to do its job without drawing attention to itself. When you twist this cap into place, you feel that reassuring click that tells you your fuel is safe, your tank is sealed, and you’re good to go.

Key Features

• Designed to fit Mercury and Quicksilver portable fuel tanks
• Durable marine-grade construction built to handle sun, spray, and constant use
• Precision-molded threads for a smooth, secure, no-leak fit
• Meets Mercury Marine OEM engineering standards
• Direct replacement fuel cap — no modifications needed
• Mercury Marine part number 8M0060029

Engine & Boat Compatibility

• Fits Mercury and Quicksilver branded portable fuel tanks
• Suitable for outboards of many horsepower ranges that use portable tanks
• Common on inflatable tender boats, fishing skiffs, jon boats, dinghies, and small center consoles
• Works with portable tank systems supporting both 2-stroke and 4-stroke setups

Performance & Practical Benefits

A good fuel cap isn’t something you admire — it’s something you rely on. With this Mercury cap installed, you’ll notice right away how smoothly it threads into the tank. There’s no cross-threading, no guessing, no wrestling with cheap plastic. Just a clean, tight seal every time. That seal is what keeps your fuel fresh, your tank clean, and moisture out, especially on those long, humid days when pressure changes can cause lesser caps to leak or warp.

Out on the water, that tight seal makes everything feel steadier and more secure. No fumes escaping, no sloshing fuel creeping out around the rim, and no worrying about grit or spray getting into the tank. The cap stays firm even in rough water or during hard turns, and it’s built to handle years of UV exposure without cracking or becoming brittle.

What you’ll feel most is confidence — confidence that your portable tank is protected, that your fuel system is clean, and that this small replacement part is doing its job quietly and consistently. When every trip depends on your engine starting right up, the quality of something as humble as a fuel cap matters more than most boaters realize.

Why Buy OEM

Here’s the simple truth: the fuel cap is one part where buying aftermarket can really bite you. A poorly molded thread or a weak seal can introduce water, air, or debris into your fuel — and it only takes a little contamination to cause big engine problems. A genuine Mercury Marine part eliminates that risk. It fits the way it should, seals the way it’s designed to, and lasts season after season. You’re not just buying a cap — you’re buying reliability, longevity, and the peace of mind that comes with using components engineered specifically for your fuel system.

FAQ

Q1: Which systems does this fuel cap fit?

It’s made for Mercury and Quicksilver portable fuel tanks used across many small-boat outboard setups.

Q2: How is this different from aftermarket caps?

OEM caps provide precise threading, a stronger seal, and long-term durability that generic caps often can’t match.

Q3: How do I know if it’s the right replacement for my tank?

If your tank is Mercury or Quicksilver branded, this is likely the correct cap. Check your owner’s manual to confirm.

Q4: Can it be used in saltwater and freshwater environments?

Absolutely — it’s built from marine-grade materials designed for both conditions.

Q5: Is installation straightforward?

Yes. Simply remove your old cap and thread this one into place. No tools needed.