Mercury – Inline Fuel Filter | Under-Cowl Fuel System | Clear Polymer Housing | 877565T1

Overview

There’s something reassuring about knowing the fuel running into your outboard is clean, steady, and free of anything that could slow you down. The Quicksilver 877565T1 Inline Fuel Filter gives you that quiet confidence. It sits under the cowl doing simple, honest work — catching debris before it ever reaches your engine. When you’re idling toward the flats at sunrise or cruising back across open water with tired kids in the boat, having a filter you can trust makes all the difference. It keeps your engine breathing clean so your time on the water stays easy and uninterrupted.

Key Features

• Under-cowl inline fuel filter
• Designed for Mercury and Mariner 25–90 horsepower carbureted four-stroke outboards
• Clear polymer housing allows quick contamination checks
• Maintains consistent fuel flow to protect engine performance
• Built to precise OEM filtration standards

Engine & Boat Compatibility

• Fits 1999 and newer Mercury and Mariner 25–90 horsepower carbureted four-stroke outboards
• Ideal for fishing skiffs, pontoons, lightweight runabouts, freshwater tin boats, and utility hulls
• Suitable for both saltwater and freshwater environments

Performance & Practical Benefits

This filter keeps your engine running smooth and predictable by catching fine particles before they reach sensitive components. The clear housing makes it easy to glance under the cowl and confirm everything is clean — no guessing, no surprises mid-season.

A fresh filter means easier starts, cleaner throttle response, and steady fuel delivery on long runs. If you’ve ever dealt with a clogged filter miles from the dock, you’ll appreciate how much security a high-quality OEM filter provides. Installation is quick, and because it uses standard clamp fittings, replacements are straightforward and mess-free.

Why Buy OEM

Fuel filtration is one of those areas where cutting corners always catches up with you. Aftermarket filters may look the same, but their media density, flow rate, and housing quality vary wildly. With an OEM Quicksilver filter, you get consistent filtration, proper fitment, and a design tested specifically for Mercury four-stroke engines.

This is one of the easiest and cheapest ways to protect your engine’s longevity — and it’s worth doing right.

FAQ

Q1: Which engines does this filter fit?

Mercury and Mariner 25–90 horsepower carbureted four-stroke outboards, 1999 and newer.

Q2: What makes this OEM filter better than universal replacements?

Correct filtration density, proper flow rate, and a housing designed to withstand marine vibrations and fuel blends.

Q3: How do I confirm compatibility?

Match your engine’s serial number or check your service manual.

Q4: Can it be used in saltwater?

Absolutely — the materials are designed for both salt and freshwater.

Q5: Is installation easy?

Yes, most owners can replace it in minutes using basic hand tools.