35-866171A01 35-8M0093688 Fuel Filter for Mercury Mercruiser | JLM Marine

Fuel Filter for Mercury Mercruiser – Fits Gen 3 Cool Fuel System (2-Pack)

This aftermarket fuel filter kit is designed for Mercury MerCruiser Alpha and Bravo engine drive models equipped with Gen 3 Cool Fuel systems. Compatible with a wide range of V8 engines including 5.0L, 5.7L, 6.2L, 8.1L, and big block 496 and 8.2L configurations, this filter ensures clean fuel delivery and optimal engine performance.

Direct Replacements: 35-8M0093688, 35-866171A01. This filter element fits MerCruiser Bravo V8 engines, 520 & 540 series, Scorpion EC models, and various MPI, MAG, and inboard configurations across multiple serial number ranges.

• Package includes 2 fuel filter elements for extended service intervals
• Designed specifically for Gen 3 Cool Fuel systems on MerCruiser engines
• Maintains proper fuel flow and protects fuel injection components

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

This package includes:

• 2 × Fuel Filter Elements

Installation Guide

1. Safety First: Ensure the engine is off and cool before beginning work. Relieve fuel system pressure by turning the ignition key to ON (without starting) and then OFF several times.
2. Locate the Filter: Identify the fuel filter assembly on your MerCruiser engine, typically mounted near the fuel pump or along the fuel rail.
3. Disconnect Fuel Lines: Carefully disconnect the fuel lines from the filter housing. Have rags ready to catch residual fuel.
4. Remove Old Filter: Unscrew or unclip the filter housing cover and remove the old filter element.
5. Inspect Housing: Clean the inside of the filter housing and check the O-rings or seals for damage.
6. Install New Filter: Insert the new fuel filter element into the housing, ensuring proper orientation as indicated by any arrows or markings.
7. Reassemble Housing: Replace the housing cover and secure it tightly. Ensure all seals are properly seated.
8. Reconnect Fuel Lines: Reattach fuel lines to the filter housing, making sure all connections are secure and leak-free.
9. Prime the System: Turn the ignition key to ON (without starting) several times to prime the fuel system and check for leaks.
10. Start Engine: Start the engine and allow it to idle. Monitor for smooth operation and inspect all connections for fuel leaks.
11. Final Inspection: Shut off the engine and perform a final check of all fittings and connections.
12. Dispose Properly: Dispose of the old fuel filter according to local environmental regulations.

Troubleshooting & FAQ

Q: How do I confirm this filter fits my MerCruiser engine?
A: Check the compatible engine models table above for your specific engine model and serial number range. You can also cross-reference the OEM part numbers 35-8M0093688 or 35-866171A01 with your engine's parts manual or use the Mercury Parts Catalog link provided.

Q: How often should I replace my fuel filter?
A: Mercury recommends replacing fuel filters annually or every 100 hours of operation, whichever comes first. If you notice engine performance issues, rough idling, or difficulty starting, inspect and replace the filter sooner.

Q: What are the signs of a clogged or failing fuel filter?
A: Common symptoms include engine misfires, hesitation during acceleration, difficulty starting, reduced power output, and rough idling. If you experience any of these issues, inspect your fuel filter immediately.

Q: Can I use this filter on non-Gen 3 Cool Fuel systems?
A: No, this filter is specifically designed for Gen 3 Cool Fuel systems on MerCruiser engines. Using it on other fuel system configurations may result in improper fit or performance issues.

Q: Why does this kit include two filters?
A: The package contains two filter elements to provide a spare for your next scheduled maintenance or to replace filters on engines with dual filter setups.

Q: Is this an OEM part or an aftermarket replacement?
A: 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.

Q: How fast do you ship and how much does it cost?
A: 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.

Q: What is your warranty and return policy?
A: 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.