Mercury – Inline Fuel Filter Kit | Fuel System Protection | Marine-Grade Construction | 864572A1

Overview

If you’ve spent enough time on the water, you know how quickly a perfect day can sour when fuel delivery starts acting up. A sputter here, a rough idle there—and suddenly you’re drifting instead of cruising. That’s why a dependable inline fuel filter matters more than most people realize. The Mercury Marine 864572A1 Inline Fuel Filter Kit gives you that steady, quiet confidence. It cleans the fuel before it reaches the booster pump, keeps debris where it belongs, and helps your engine settle into that smooth, easy rhythm every boater loves.

Key Features

• Replacement inline fuel filter kit for MerCruiser sterndrive and inboard gasoline engines
• Installed between the fuel tank and the booster pump
• Kit includes filter, fittings, and clamps for a complete replacement
• Helps prevent debris from reaching the booster pump and causing fuel restriction
• Engineered to Mercury Marine’s original equipment specifications
• Designed for clean, reliable fuel flow throughout the season
• Quick, straightforward installation with basic tools

Engine & Boat Compatibility

• Fits MerCruiser gasoline sterndrive and inboard engines equipped with a fuel booster pump
• Suitable for both carbureted and fuel-injected models with inline fuel filtration
• Commonly used on family runabouts, bowriders, cruisers, tow boats, and fishing vessels
• Ideal for boats in environments where fuel quality varies—marinas, portable tanks, or older fuel systems

Performance & Practical Benefits

Fuel problems can ruin your day faster than just about anything. This kit doesn’t just replace a filter—it restores a sense of reliability. Once installed, the 864572A1 keeps the fuel flowing clean and steady, protecting the booster pump from grit that settles at the bottom of many tanks. That means fewer stumbles when you throttle up, smoother idle when you’re navigating tight docks, and more confidence when you’re miles away from the ramp.

The fittings and clamps included with the kit make the job simple. Everything seats tight and secure, giving you a filter connection that won’t seep, loosen, or vibrate apart. Over the season, you’ll notice how much cleaner and more consistent your engine behaves. Instead of guessing what’s happening inside your fuel system, you’ll know—because the filter is doing its job quietly, hour after hour.

Why Buy OEM

Choosing a genuine Mercury Marine part is about more than name recognition.

• OEM filtration levels match your engine’s exact fuel delivery requirements
• Designed to withstand vibration, heat, and constant exposure to marine conditions
• Better long-term value than aftermarket filters that may not seal properly
• Engineered to fit perfectly and perform correctly the first time
• Helps maintain smooth acceleration, steady fuel flow, and reliable starts

When you’re relying on a booster pump to pull fuel, the quality of your filter matters. OEM makes sure you get it right.

FAQ

Q1: Which Mercury engines does the Inline Fuel Filter Kit 864572A1 fit?

It fits MerCruiser gasoline sterndrive and inboard engines that use a fuel booster pump and inline filter.

Q2: How is this kit different from aftermarket versions?

You get a matched set of OEM fittings, clamps, and a filter built to Mercury’s exact fuel flow and filtration standards.

Q3: How do I know if this is the correct filter for my setup?

Check your system—if you have a booster pump with an inline filter between the tank and pump, this part number is usually the correct replacement.

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

Yes. It’s designed for all marine conditions and resists corrosion and fuel degradation.

Q5: Is installation easy?

Definitely. With the included hardware and basic tools, most boat owners can replace this filter in minutes.