Mercury Inline Fuel Filter – Fits Mercury/Mariner 9.9-50HP Outboards (Replaces 35-8M0088825, 853733A2, 853733T02, 853733T03, 898101T68)

Mercury Inline Fuel Filter – Fits Mercury/Mariner 9.9-50HP Outboards

This inline fuel filter is designed for a wide range of Mercury and Mariner 4-stroke outboards from 9.9HP to 50HP. It ensures clean fuel delivery by filtering out contaminants, protecting your engine and maintaining performance. Please check your engine's serial number against the compatibility list below to ensure a perfect fit.

This component is a direct replacement for Mercury OEM part numbers: 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, and 35-898101T68.

• Installation Type: Installs directly in-line on the fuel hose.
• Fuel Compatibility: Designed for use with gasoline.
• Package Includes: One complete fuel filter assembly.

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 Assembly (Replaces 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68)

Explosion Diagram

Installation Guide

1. Safety First: Ensure the engine is off and cool. Turn off the fuel supply valve and disconnect the battery.
2. Locate Filter: Find the existing inline fuel filter on the fuel line between the fuel tank and the engine.
3. Prepare for Removal: Place a rag or container under the filter to catch any spilled fuel.
4. Release Clamps: Loosen the hose clamps on both sides of the old filter.
5. Remove Old Filter: Gently twist and pull the fuel lines off the old filter. Note the direction of the fuel flow arrow on the filter.
6. Install New Filter: Attach the fuel lines to the new filter, making sure the arrow points in the direction of fuel flow (towards the engine).
7. Secure Clamps: Slide the hose clamps into position and tighten them securely on both ends of the new filter.
8. Final Check: Turn the fuel supply back on. Prime the fuel system if necessary and carefully check for any leaks around the filter connections before starting the engine.

Troubleshooting & FAQ

Q: How do I confirm this filter fits my Mercury engine?
A: The most reliable way is to match your engine's serial number to the ranges listed in the "Compatible Engine Models" table. The serial number is usually on a plate on the transom bracket. Using our Mercury Serial Number Guide can help you locate it.

Q: What are the signs that my fuel filter needs replacing?
A: Common symptoms include the engine hesitating, bogging down under acceleration, stalling, or failing to start. A visual inspection might also show the filter is dirty or clogged. We recommend replacement as part of your regular annual service.

Q: Is there a correct orientation for installing this filter?
A: Yes, this is critical. The filter must be installed with the fuel flow arrow pointing towards the engine. Installing it backward will block fuel flow and prevent the engine from running.

Q: OEM vs. Aftermarket?
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.