Mercury – Water Separating Fuel Filter | Quicksilver Series | Steel Construction | 8M0154758

Overview

There’s a certain comfort that comes from knowing the fuel moving through your engine is as clean as it should be. When you’re pushing offshore at sunrise or easing back toward the dock with tired arms and a cooler full of fish, you want every part on board pulling its weight. This Mercury Marine part gives you that quiet confidence—the kind you only appreciate once you’ve spent enough time on the water to know how quickly fuel contamination can ruin a day. The Water Separating Fuel Filter 8M0154758 keeps your engine protected, steady, and breathing clean fuel, no matter what the conditions throw at you.

Key Features

• Designed to separate water from fuel and capture harmful debris
• Steel construction for long-term durability in marine environments
• Engineered 10-micron filtration delivering over 90 percent efficiency
• Direct replacement for Volvo 3847644 and Sierra 18-8149
• Simple spin-on installation for quick seasonal servicing
• Built to support a wide range of Volvo-Penta sterndrive and inboard engines

Engine & Boat Compatibility

• Volvo-Penta 4.3GL-J/JF, 4.3GXi-J/JF, 4.3OSi-J/JF
• Volvo-Penta 5.0GL-J/JF, 5.0GXi-J/JF, 5.0OSi-J/JF
• Volvo-Penta V6 200/240/280, V6 200/225 (Gen 1 and newer)
• Volvo-Penta V8 300/350 (Gen 5), V8 380/430 (6.2L Gen 5)
• Volvo-Penta V8 350/380/430 (6.0L)
• Volvo-Penta V8 225/270/300/320 (Gen 1 and newer)
• Volvo-Penta 5.7Gi300-J/JF, 5.7GXi-J/JF, 5.7OSi-J/JF, 5.7OSXi-J/JF
• Suitable for cruisers, sport boats, deck boats, runabouts, and many multipurpose family boats

Performance & Practical Benefits

You can always tell when a fuel filter is doing its job. The engine holds its idle without wandering, acceleration feels clean, and there’s a steady confidence in the way the boat responds. This filter brings that kind of dependability. With tight 10-micron separation, it blocks the debris and moisture that often sneak into marina fuel or settle in the tank between trips.

Installation is straightforward: remove the old filter, thread on the new one, and you’re set. No wrestling, no guessing. Once installed, it keeps the fuel system balanced and consistent, helping prevent hesitation, poor starting, and performance drops that can creep up after long periods of use. Its corrosion-resistant steel body stands up to the harsh dampness of marine storage, making seasonal maintenance simple and predictable.

Why Buy OEM

If you’ve been boating long enough, you learn there’s a difference between parts that fit and parts that truly work the way the engine was designed to run. This genuine Mercury Marine part is built and tested to meet exact specifications, giving you reliability that aftermarket filters just can’t match. It lasts longer, seals properly, and maintains the filtration levels your engine depends on.

Choosing OEM saves money in the long run because you’re protecting the engine instead of rolling the dice on cheaper filters that let contaminants slip through. This is one of those small choices that pays for itself every season—cleaner fuel, smoother running, less downtime.

FAQ

Q1: Which Mercury engines or systems does the Water Separating Fuel Filter fit?

It’s designed for a wide range of Volvo-Penta sterndrive and inboard setups listed above, all supported by Mercury Marine’s Quicksilver line.

Q2: What makes this part different from aftermarket alternatives?

You get tighter filtration, better water separation, and a stronger steel housing. It’s engineered specifically for marine use, not repurposed from automotive designs.

Q3: How do I know if this is the right replacement for my setup?

Check your owner’s manual for the cross-reference numbers Volvo 3847644 or Sierra 18-8149. If your current filter matches those, this part number is the correct fit.

Q4: Can this be used in both saltwater and freshwater?

Absolutely. Its corrosion-resistant build is meant for long-term exposure to either environment.

Q5: Is installation straightforward for most boat owners?

Yes. It threads on easily, and most owners can swap it during routine seasonal maintenance.