Mercury – Water Separating Fuel Filter Disc | Gen III Fuel Cooler System | Marine-Grade Composite | 8M0204703

Overview

Anyone who’s spent long days on the water knows how important clean, reliable fuel flow is to a smooth-running engine. There’s a certain comfort that comes from knowing your fuel system is protected that no matter the conditions, your engine will breathe clean and run steady. This Mercury Marine part brings that same peace of mind. Whether you’re drifting along a quiet shoreline or pushing your boat hard across open water, this filter disc helps ensure your fuel stays pure and your performance stays predictable.

Key Features

• Replacement water separating fuel filter disc for Mercury and MerCruiser engines
• Designed for 2004 and newer sterndrive and inboard engines equipped with Gen III fuel cooler components
• Marine-grade composite construction for durability and dependable filtration
• Provides steady fuel flow while removing water and contaminants
• Easy installation using common shop tools
• Mercury Marine part number 8M0204703 (replaces previous part number 892665)

Engine & Boat Compatibility

• Fits 2004 and newer MerCruiser sterndrives with Gen III fuel cooler assemblies
• Compatible with many Mercury inboard platforms using the same cooling and filtration system
• Common on cruisers, sport boats, runabouts, cabin boats, and sterndrive-powered pontoons
• Suitable for both recreational setups and commercial applications requiring consistent fuel quality

Performance & Practical Benefits

A fuel system only performs as well as the filtration protecting it, and this filter disc plays a quiet but essential role in everyday operation. You’ll feel the difference in how steady the engine idles, how cleanly it accelerates, and how reliably it responds under load. By removing water and debris before they ever reach sensitive components, the disc keeps the fuel stream clean and reduces wear on injectors, pumps, and internal passages.

Its marine-grade construction holds strong against constant temperature changes, moisture, and vibration — the same conditions that often cause inferior filters to fail. The fit is tight and precise, sliding into place with a smooth, secure feel. Once installed, you simply enjoy the benefits: cleaner burn, improved throttle response, and the confidence that comes from knowing your fuel system isn’t fighting contaminants.

Why Buy OEM

With something as important as fuel filtration, experience matters. A genuine Mercury Marine part is engineered to meet the exact flow rates and separation requirements of the Gen III fuel cooler system. Aftermarket options often struggle with inconsistent materials or improper tolerances, which can restrict flow or allow water to pass where it shouldn’t.

Using the correct part number helps protect your sterndrive investment, extend component life, and maintain the performance Mercury engines are known for. It’s the same advice you’d hear from a seasoned boater at the marina: stick with OEM, and you’ll spend far less time troubleshooting and far more time enjoying your boat.

FAQ

Q1: Which engines does the Water Separating Fuel Filter Disc 8M0204703 fit?

It fits 2004 and newer MerCruiser sterndrive and inboard engines equipped with Gen III fuel cooler components.

Q2: What makes this different from aftermarket fuel discs?

It’s built to Mercury’s exact filtration and flow standards, using marine-grade materials designed for long-term reliability.

Q3: How do I know if it’s the correct replacement for my setup?

Check your existing filter disc or your manual. If your engine uses a Gen III fuel cooler and calls for part number 8M0204703 or 892665, this is the right one.

Q4: Can it be used in both saltwater and freshwater applications?

Yes — the filtration system protects fuel quality in any environment, regardless of where you run your boat.

Q5: Is installation straightforward for most boat owners?

Absolutely. With basic tools and clear access to the Gen III fuel cooler assembly, most owners find it quick and simple.