Water Separating Fuel Filter Disc – Fits Mercury/MerCruiser GEN III Fuel Cooler Systems (Replaces 35-892665, 8M0204703)

Water Separating Fuel Filter Disc – Fits Mercury/MerCruiser GEN III Fuel Cooler Systems (Replaces 35-892665, 8M0204703)

This fuel filter disc is designed for 2004 and newer Mercury/MerCruiser sterndrive and inboard engines equipped with Generation III fuel cooler systems. It effectively separates water from fuel to protect your engine's sensitive components.

This is a direct replacement for Mercury/MerCruiser part numbers 35-892665 and 8M0204703, as well as aftermarket part Sierra 18-7715.

• Installation Location: Mounts inside the engine's Gen III fuel cooler housing.
• Fuel Compatibility: Designed for gasoline-powered engines.
• Function: Replacement water-separating element.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Water Separating Fuel Filter Disc (35-892665/8M0204703)

Explosion Diagram

Installation Guide

1. Ensure the engine is off, cool, and the battery is disconnected.
2. Locate the Gen III fuel cooler on your engine. Place a rag underneath to catch any spilled fuel.
3. Carefully relieve the fuel system pressure according to your engine's service manual.
4. Disconnect the necessary fuel lines and electrical connectors from the cooler assembly.
5. Unscrew the housing cover of the fuel cooler to access the old filter disc.
6. Remove the old filter disc and any associated o-rings or seals.
7. Clean the inside of the housing and inspect for any wear or debris.
8. Install the new filter disc, ensuring it is seated correctly in the housing.
9. Reassemble the housing, ensuring a tight seal, and reconnect all lines and connectors.
10. Prime the fuel system as per the manufacturer's instructions and check thoroughly for leaks before starting the engine.

Troubleshooting & FAQ

How do I confirm this fits my engine?

This filter is specifically designed for 2004 and newer Mercury/MerCruiser engines that use a Generation III fuel cooler system. Check the compatibility table and verify your engine requires OEM part number 35-892665 or 8M0204703 before ordering.

How often should I replace this fuel filter disc?

Replacement frequency depends on fuel quality and operating hours. It is best practice to inspect the filter annually and replace it if you notice any signs of contamination (debris, water), power loss, or as directed by your engine’s service manual.

What are the signs of a failing fuel filter?

Common symptoms include engine sputtering or hesitation, difficulty starting, reduced power, or stalling, especially under load. These issues indicate that fuel flow may be restricted by a clogged filter.

OEM vs. Aftermarket?

This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?

We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?

This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.