Fuel Filter Assembly – Fits Mercury/Mariner 75-115HP Outboards (Replaces 35-881538T1, 35-881538T02)

Fuel Filter Assembly – Fits Mercury/Mariner 75-115HP Outboards (Replaces 35-881538T1)

This fuel filter assembly is designed for use on Mercury and Mariner 75, 80, 90, 100, and 115 HP 4-stroke outboard engines manufactured between 2004 and 2011. It ensures clean fuel delivery by filtering out contaminants, protecting your engine from damage and maintaining optimal performance.

This unit is a direct replacement for Mercury part numbers 35-881538T1 and 35-881538T02. It features an 8mm (5/16") hose connection for compatibility with factory fuel lines.

• Installation Type: In-line
• Compatible Fuel: Gasoline
• Connection Size: 8mm (5/16") Barb

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 (35-881538T1/35-881538T02)

Explosion Diagram

Installation Guide

1. Turn off the fuel supply and disconnect the engine's battery.
2. Locate the existing fuel filter. Place a shop towel or rag underneath to catch any residual fuel.
3. Carefully loosen the clamps and remove the fuel hoses from both ends of the old filter.
4. Remove the old filter from its mounting bracket if applicable.
5. Install the new filter, making sure the arrow on the filter housing points in the direction of fuel flow (towards the engine).
6. Securely reattach the fuel hoses to the new filter and tighten the clamps.
7. Reconnect the battery.
8. Prime the fuel system according to your engine's manual and check thoroughly for any leaks before starting the engine.

Troubleshooting & FAQ

How can I confirm this filter fits my specific Mercury outboard?

This filter fits various 75-115HP Mercury/Mariner 4-stroke models from 2004-2011. The best way to confirm is to match your engine's serial number against the ranges listed in the 'Compatible Engine Models' table. Also, verify that your engine uses an 8mm (5/16") fuel line connection.

What direction should the filter be installed?

This is an in-line filter. It must be installed with the fuel flow arrow on the housing pointing towards the engine. Incorrect installation can block fuel flow and starve the engine of fuel.

How often should I replace my fuel filter?

As a crucial part of routine maintenance, we recommend replacing your fuel filter annually or every 100 hours of operation, whichever comes first. Please consult your owner's manual for the specific service interval recommended for your engine model.

What are the symptoms of a clogged fuel filter?

Common signs of a restricted fuel filter include engine hesitation, sputtering, loss of power, difficulty starting, or stalling, especially at high speeds. Replacing a clogged filter is a common fix to restore engine performance.

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.