Fuel Filter – Fits Mercury/Mariner 9.9-30HP EFI FourStroke Outboards (Replaces 35-8M0134466)

Fuel Filter – Fits Mercury/Mariner 9.9-30HP EFI FourStroke Outboards (Replaces 35-8M0134466)

This fuel filter is designed for Mercury Marine FourStroke 9.9-30HP EFI outboards (2017 and newer) with serial numbers 0R833820 and up. It provides reliable filtration to protect your engine's sensitive fuel injection system.

This component is a direct replacement for Mercury/Quicksilver part numbers 35-8M0134466 and 8M0134466.

• Installation Location: Mounts under the engine cowl for internal filtration.
• Fuel Compatibility: Designed for use with gasoline/petrol fuel systems.
• Visible Fuel Check: Features a translucent bowl to easily monitor fuel content and check for contaminants like water or debris.

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 Fuel Filter (35-8M0134466/8M0134466)

Explosion Diagram

Installation Guide

1. Turn the engine off and allow it to cool completely. For safety, disconnect the boat's battery.
2. Place an absorbent rag or suitable container beneath the existing fuel filter to catch any fuel spillage.
3. Carefully disconnect the fuel lines from both sides of the old filter. Take note of their correct orientation.
4. Remove the old filter from its mounting bracket or housing.
5. Before installing, compare the new filter with the old one to confirm it is the correct replacement part.
6. Secure the new filter into the mounting bracket.
7. Reconnect the fuel lines to the new filter, ensuring they are securely attached to the correct inlet and outlet ports.
8. Prime the fuel system according to your engine's service manual to fill the new filter with fuel.
9. Reconnect the battery.
10. Start the engine and run it for a few minutes while carefully inspecting the filter and connections for any signs of fuel leaks.

Troubleshooting & FAQ

How do I confirm this filter fits my Mercury engine?
This filter is designed for Mercury/Mariner 9.9-30HP EFI FourStroke outboards from 2017 and newer. To be certain, check that your engine's serial number is 0R833820 or higher, and cross-reference your existing filter's part number with 35-8M0134466 or 8M0134466.

What are the signs that my fuel filter needs replacement?
Common signs include engine sputtering, hesitation under acceleration, difficulty starting, or a general loss of power. The translucent bowl on this filter also allows for visual inspection; if you see significant debris or water, it is time for a replacement.

How often should I replace this fuel filter?
For optimal engine performance and protection, it is recommended to replace the fuel filter annually or every 100 hours of operation, whichever occurs first. Always consult your engine's owner manual for manufacturer-recommended service intervals.

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.