Cartridge Fuel Filter Assembly – Fits Mercury/Mariner 30-60 HP 4-Stroke Outboards (Replaces 35-879884T, 879884T)

Cartridge Fuel Filter Assembly – Fits Mercury/Mariner 30-60 HP 4-Stroke Outboards

This inline cartridge fuel filter assembly is designed for Mercury and Mariner 30-60 HP 4-Stroke EFI outboards. It is compatible with 3-cylinder and 4-cylinder models that feature a screw-on filter bowl mounted under the engine cowl.

This assembly is a direct replacement for Mercury/Quicksilver part numbers: 35-879884T, 879884T, and 35-898101T68.

• Features a 20-micron filter element to remove harmful contaminants from your fuel supply.
• The translucent bowl allows for easy visual inspection of fuel quality and trapped debris.
• Installs inline under the engine cowl.

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 Cartridge Type Fuel Filter Assembly (879884T)
• 1 x Filter Element (Pre-installed in bowl)
• 1 x O-ring

Installation Guide

Follow these steps for proper installation. Ensure the engine is off and cool, and the fuel supply is shut off.

1. Safety First: Work in a well-ventilated area and have a fire extinguisher nearby. Disconnect the battery.
2. Locate Filter: The filter assembly is typically located under the engine cowl.
3. Prepare for Spillage: Place a clean rag or container underneath the filter assembly to catch any spilled fuel.
4. Remove the Bowl: Carefully unscrew the translucent filter bowl from the housing.
5. Replace Components: Remove the old filter element and o-ring. Discard them properly.
6. Clean and Inspect: Clean the inside of the bowl with a lint-free cloth. Inspect it for cracks or damage.
7. Install New Parts: Place the new filter element inside the bowl and seat the new o-ring in its groove. A light coat of clean engine oil on the o-ring can help ensure a good seal.
8. Reassemble: Screw the bowl back onto the housing and tighten it securely by hand. Do not overtighten.
9. Check for Leaks: Reconnect the battery, prime the fuel system using the primer bulb, and carefully inspect the filter for any leaks.
10. Final Check: Start the engine and let it run for a few minutes, re-checking for any signs of fuel leaks.

Troubleshooting & FAQ

Q: How do I confirm this filter fits my specific engine?
A: The most reliable method is to match the part number. This assembly replaces Mercury/Quicksilver parts 35-879884T, 879884T, and 35-898101T68. You can also check your engine model and HP against the "Compatible Engine Models" table above. When in doubt, compare the product photos to your existing part.

Q: What is the benefit of the clear/translucent bowl?
A: The clear bowl allows you to perform a quick visual inspection for water, sediment, or other debris in your fuel system. This helps in diagnosing fuel quality issues before they cause engine problems.

Q: How often should I replace the fuel filter element?
A: As a general maintenance guideline, it's recommended to replace your fuel filter annually or every 100 hours of operation, whichever comes first. Refer to your engine's service manual for the manufacturer's specific recommendation.

Q: What are the symptoms of a clogged or failing fuel filter?
A: Common signs include the engine having trouble starting, stalling at low speeds, loss of power, or sputtering at high RPMs. You may also notice visible debris or water in the filter bowl.

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.