Inline Fuel Filter – Fits Mercury & Mariner 25-90HP 4-Stroke Outboards (Replaces 35-877565T1, 35-877565T)

Inline Fuel Filter – Fits Mercury & Mariner 25-90HP 4-Stroke Outboards

This Sierra 18-7714 inline fuel filter is designed for a wide range of Mercury and Mariner 4-stroke outboard engines, from 25 to 90 HP, manufactured from 1999 and newer. It ensures clean fuel delivery, protecting your engine from contaminants.

This part is a direct replacement for Mercury Marine part numbers 35-877565T1 and 35-877565T, Sierra 18-7714, and Rareelectrical 600-276.

• Installation Method: Installs inline with your existing fuel line.
• Fuel Compatibility: Approved for use with gasoline, including modern ethanol-blended fuels.
• Quality Construction: Features sonically sealed end caps to prevent leaks and OEM-matched filter media for reliable performance.

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 Inline Fuel Filter (35-877565T1/35-877565T)

Explosion Diagram

Installation Guide

1. Shut off the fuel supply using the fuel valve and safely disconnect the engine's battery.
2. Place a rag or container under the existing filter to catch any fuel spillage.
3. Carefully loosen the clamps and disconnect the fuel hoses from both ends of the old filter. Note the direction of the fuel flow arrow.
4. Remove the old filter from its mounting bracket or position.
5. Install the new filter, ensuring the arrow correctly points in the direction of fuel flow (towards the engine).
6. Securely attach the fuel hoses to the new filter and tighten the clamps.
7. Mount the new filter back into its original position if applicable.
8. Turn the fuel supply back on and check thoroughly for any leaks around the connections.
9. Reconnect the battery. Prime the fuel system according to your engine's manual before starting.

Troubleshooting & FAQ

Q: How do I confirm this filter fits my Mercury or Mariner engine?

A: Check your engine's model, horsepower, and year against the "Compatible Engine Models" table. For Mercury engines, verifying the serial number range is the most accurate way to ensure a match. If you are unsure, use the guide linked above or contact us with your engine details.

Q: How often should I replace my inline fuel filter?

A: For optimal engine health, it is recommended to replace your fuel filter annually or every 100 hours of operation, whichever comes first. Refer to your engine's service manual for specific maintenance intervals, especially if operating in harsh marine environments.

Q: What are the signs of a clogged or failing fuel filter?

A: Common symptoms include the engine sputtering, losing power, stalling at idle, or difficulty starting. A dirty or clogged filter restricts fuel flow, starving the engine of the fuel it needs to run properly.

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.