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

Overview

Ask anyone who spends their weekends on the water and they’ll tell you—clean fuel is everything. A boat can look great, sound great, and even run great… right up until a little debris sneaks its way into the fuel system. That’s when the day takes a turn. With the Mercury Marine 864572 Inline Fuel Filter, you get the kind of quiet reassurance every boater appreciates. It sits tucked between your fuel tank and booster pump, doing its job without fanfare, keeping your engine breathing clean and running smooth so you can focus on the ride, not the worry.

Key Features

• Replacement inline fuel filter designed for MerCruiser gasoline sterndrive and inboard engines
• Installed between the fuel tank and fuel booster pump for debris protection
• Helps prevent clogged booster pumps and fuel delivery issues
• Built to Mercury Marine’s original equipment specifications
• Durable, marine-ready construction for long-term reliability
• Easy replacement using common tools

Engine & Boat Compatibility

• Fits MerCruiser sterndrive and inboard gasoline engines equipped with a fuel booster pump
• Works across a wide range of MPI and carbureted MerCruiser powerplants
• Common on runabouts, bowriders, cruisers, sport boats, and tow boats
• Ideal for boats stored in variable environments where fuel quality can be inconsistent

Performance & Practical Benefits

A good inline filter doesn’t just protect your engine—it protects your whole day on the water. This Mercury Marine part is engineered to catch the fine bits of debris that settle in fuel tanks over time. You may never see that debris, but your booster pump will sure feel it if the filter stops doing its job. With the 864572 installed, fuel flow stays clean and steady, helping your engine respond smoothly when you drop the throttle or ease into a marina.

The fit is tight and secure, and once seated in the line, it becomes one of those “set it and forget it” parts—simple, reliable, and quietly essential. Replacing it takes only a few minutes, and that small bit of seasonal maintenance can spare you from fuel starvation, rough running, or unexpected stalls. It’s one of those upgrades where you immediately feel the difference in how confidently your boat settles into its rhythm.

Why Buy OEM

When it comes to filtering fuel, the margin for error is small.

• OEM filters match Mercury’s recommended flow rate and filtration level
• Built to last a full season or longer, depending on engine use
• Designed specifically for Mercury booster pump systems
• More dependable than many aftermarket filters that may not seal as tightly
• Helps maintain performance, smooth acceleration, and reliable starting

Choosing original equipment is simply the smarter move if you want consistent results and fewer surprises.

FAQ

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

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

Q2: What makes this filter better than aftermarket versions?

OEM filters maintain the correct flow, filtration, and sealing Mercury engines require—something aftermarket versions often miss.

Q3: How do I know if this is the correct replacement?

Check your fuel system: if your MerCruiser has a booster pump and an inline filter between the tank and pump, this is the correct match for part number 864572.

Q4: Is it suitable for both fresh and saltwater boating?

Absolutely. Its materials and construction are made for marine environments of all kinds.

Q5: Is installation straightforward?

Yes. Most boat owners can replace this filter in minutes with simple hand tools and their owner’s manual.