Mercury – Under-Cowl Inline Fuel Filter Screen | Fuel System | Composite Mesh | 8M0090809

Overview

Every boater knows that the smoothest days on the water start long before the engine even turns over. It begins with the quiet confidence of knowing every component feeding your motor is clean, protected, and doing its job without complaint. That is exactly the kind of trust the Mercury 8M0090809 Under-Cowl Inline Fuel Filter Screen gives you. You do not notice it when everything is running right, and that’s the point. It keeps the fuel system steady, the throttle crisp, and the engine breathing clean even on long, choppy runs.

Key Features

• Under-cowl inline fuel filter designed to block harmful debris before it reaches the fuel system.
• Precision composite mesh for reliable filtration and smooth fuel delivery.
• Built for Mercury EFI FourStroke, Verado, and Racing platforms.
• Helps preserve engine efficiency, idle quality, and high-rpm power.
• Seasonal replacement recommended for peak performance.
• Manufactured to Mercury Marine’s exact engineering standards.

Engine & Boat Compatibility

• Fits 75–115HP ProXS 2.1L EFI FourStroke outboards.
• Fits 150HP EFI FourStroke outboards.
• Compatible with 150R and 200R Mercury Racing outboards.
• Fits 175–300HP V6 and V8 FourStroke and Verado engines.
• Compatible with 200–400HP L6 Verado.
• Fits 350–425HP V10 Verado and 500–600HP V12 Verado.
• Common on bass boats, offshore center consoles, pontoons, bay boats, and performance rigs.

Performance & Practical Benefits

A clean fuel system changes everything. You feel it the moment the engine fires—smooth, steady, confident. This filter keeps debris and fine particles from slipping into the injectors, protecting the engine from hesitation, rough idle, or the kind of power loss that sneaks up on you over time. The 8M0090809 filter delivers a tight, reliable seal and a smooth, consistent flow of fuel, even when the water turns rough or the tank runs low.

Because it installs under the cowl, it works quietly in the background, catching the debris that naturally collects in a tank over a season. You’ll notice better acceleration, fewer hiccups at idle, and cleaner combustion. It’s one of those small pieces that makes the whole setup feel more secure—simple, practical, and absolutely essential for protecting high-performance outboards.

Why Buy OEM

When it comes to filtration, shortcuts never pay off. A genuine Mercury Marine part ensures the mesh density, flow rate, and fitment match exactly what your engine was designed to run with. Aftermarket filters might look similar, but they often restrict flow or allow fine debris to slip through. With OEM, you’re choosing durability, exact fit, and long-term reliability. It installs cleanly, seats perfectly, and maintains the level of protection Mercury built into your engine from day one.

FAQ

Q1: Which engines does the 8M0090809 filter fit?

It fits a wide range of Mercury EFI FourStroke, Verado, and Racing outboards from 75HP up to the 600HP V12 Verado.

Q2: What makes this filter different from aftermarket versions?

OEM filters match Mercury’s engineering specs, ensuring proper flow and reliable debris capture.

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

Check your serial number and compare it with the recommended ranges in your owner’s manual.

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

Absolutely—its materials hold up well in both environments.

Q5: Is installation simple?

Yes. Most owners can replace it with standard hand tools during routine seasonal maintenance.