Fuel Filter Element – Fits Mercury/Mariner 6-70 HP (Replaces 35-87946A3, 35-87946Q04)

Fuel Filter Element – Fits Mercury/Mariner 6-70 HP & Suzuki Outboards

This fuel filter element is designed to protect your marine engine's fuel system from contaminants. It serves as a direct-fit replacement for under-cowl fuel filter housings in a wide range of Mercury/Mariner 2-stroke and 4-stroke outboard engines, as well as select Suzuki models.

This part replaces multiple OEM and aftermarket part numbers, including Mercury 35-87946A3, 35-87946Q04, Suzuki 15430-87D10, Sierra 18-7802, and others, ensuring broad compatibility.

• Installation Location: Designed for under-cowl fuel filter housings with a screw-on bowl.
• Fuel Compatibility: For use with gasoline fuel systems.
• Complete Kit: Includes the necessary Viton seal (O-Ring) for the filter housing.

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.

For Suzuki owners, you can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.

Mercury/Mariner

Suzuki

Technical Specifications

Package Contents

• 1 x Fuel Filter Element with O-Ring (Replaces 35-87946A3 / 35-87946Q04 / 35-87946Q3)

Explosion Diagram

Installation Guide

1. Safety First: Shut off the engine and the fuel supply valve. Ensure the area is well-ventilated and away from any open flames or sparks.
2. Relieve Pressure: Carefully relieve any pressure in the fuel line according to your engine's service manual.
3. Access the Filter: Locate the under-cowl fuel filter housing. Place a rag or container underneath to catch any spilled fuel.
4. Remove the Bowl: Carefully unscrew the clear plastic or metal bowl from the bottom of the filter assembly.
5. Replace Element: Remove the old filter element and the o-ring/seal. Dispose of them properly.
6. Clean and Inspect: Wipe the inside of the housing and bowl clean. Inspect the bowl for cracks or damage.
7. Install New Parts: Lightly lubricate the new o-ring with clean engine oil and place it in the groove. Insert the new filter element.
8. Reassemble: Screw the bowl back onto the housing and hand-tighten until snug. Do not overtighten.
9. Final Checks: Turn the fuel supply back on. Prime the fuel system if necessary (check your manual) and carefully inspect for any leaks around the housing before starting the engine.

Troubleshooting & FAQ

How can I be sure this filter fits my engine?
This filter fits a wide range of Mercury/Mariner 6-70 HP outboards and select Suzuki models. Please compare your engine's part number against our cross-reference list (e.g., Mercury 35-87946A3, Suzuki 15430-87D10) and check the compatible models table. Verifying the visual match with your old part is also a good practice.

How often should I replace this fuel filter?
For optimal engine performance and protection, it's recommended to replace your fuel filter element annually or every 100 hours of operation, whichever comes first, especially when operating in environments with questionable fuel quality.

What are the signs of a clogged fuel filter?
Common symptoms of a failing filter include engine hesitation, sputtering, loss of power (especially at high speeds), difficulty starting, or stalling. If you notice these issues, a clogged fuel filter is a common and important component to check.

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.