879884T Cartridge Fuel Filter Compatible with Mercury Mariner 30-60HP

879884T Cartridge Fuel Filter for Mercury Mariner Outboard Engines The 879884T cartridge type fuel filter assembly is engineered for Mercury and Mariner 30HP to 60HP EFI 4-stroke outboard engines. Featuring advanced 20-micron filtration, this filter removes fuel-borne contaminants — dirt, rust particles and water moisture — keeping your outboard's injection system protected and running at peak power. 📋 Key Takeaways ✅ Direct OE Replacement: Replaces Mercury / Mariner part numbers 879884T and 35-879884T. ✅ Broad Fitment: Fits 30HP, 35HP, 40HP, 50HP and 60HP 3-cylinder and 4-cylinder EFI 4-stroke outboards. ✅ 20-Micron Protection: Advanced media blocks dirt, rust particles and water moisture before they reach the injection system. ✅ Leak-Resistant Seal: Precision-molded housing with a snug O-ring fit engineered to resist leaks. ✅ Tool-Free Installation: No special tools needed — swap it at the dock or in your garage. Features & Benefits Feature Benefit (What It Means for You) 20-Micron Filter Media Captures dirt, rust particles and water moisture before they reach high-pressure injectors, helping prevent hard starting, rough idling and power loss. Water & Rust Removal Removes damaging fuel-borne contaminants that can rob performance and cause engine damage — cleaner fuel, longer engine life. Precision-Molded Housing Snug O-ring fit engineered to resist leaks under fuel system pressure and engine vibration. Tool-Free Installation No special tools required — service your outboard at the dock or in your home garage in minutes. Factory Tested Every unit is air-leak and pressure tested for consistent quality you can rely on. Compatibility & Cross-Reference Replaces OE Part Numbers: Interchange Part Number Brand FJ-WSFF10 iFJF 879884T Mercury / Mariner OE 35-879884T Mercury / Mariner OE Common Applications: Mercury 30HP, 35HP, 40HP, 50HP and 60HP — 3-cylinder and 4-cylinder EFI 4-stroke outboards Mariner 30HP, 35HP, 40HP, 50HP and 60HP — 3-cylinder and 4-cylinder EFI 4-stroke outboards Note: This filter is designed for EFI 4-stroke models. It is not compatible with 2-stroke carbureted engines — please verify your engine type before ordering. Specifications Part Number FJ-WSFF10 (iFJF) Replaces 879884T / 35-879884T Filter Type Cartridge Type Fuel Filter Assembly Filtration Rating 20 Micron Application Mercury / Mariner 30-60HP EFI 4-stroke outboards Installation Tool-free, hand-tighten Package Includes 1 × cartridge fuel filter assembly Why Choose iFJF Over the OE Dealership? 🛡️ 1-Year Warranty Included · 30-Day Easy Returns · Lifetime Support Not satisfied? Return it. Fails prematurely? We'll replace it — no receipt-hoarding, no dealership runaround. As a professional filter manufacturer with a CNAS certified laboratory, we design and build our products to strictly match — and often exceed — OE specifications. Every single unit undergoes rigorous quality verification: 🔬 Lab-Tested Performance: Validated for filtration efficiency, particle holding capacity and burst strength. 🔍 100% Leakage Control: Factory-tested under high pressure to ensure zero leakage. 🛡️ Premium Build Quality: Precision-molded housing with O-ring sealing for harsh marine environments. 💰 Factory-Direct Supply: Commercial-grade quality directly from the manufacturer, no middleman markup. ⭐ Parts in stock and ready to ship from our US warehouse. Frequently Asked Questions Q: Will this fit my Mercury 60HP 4-stroke outboard? A: Yes. This filter is a direct replacement for Mercury and Mariner 30HP, 35HP, 40HP, 50HP and 60HP 3-cylinder and 4-cylinder EFI 4-stroke outboard engines, replacing part numbers 879884T and 35-879884T. Q: Does this fuel filter remove water from the fuel? A: Yes. The 20-micron filter media removes damaging fuel-borne contaminants including dirt, rust particles and water moisture that can rob performance and cause engine damage. Q: Does this filter leak at the housing? A: Every filter is dimensional-matched to the 879884T / 35-879884T specifications, with a precision-molded housing and snug O-ring seal engineered to resist leaks under fuel system pressure and engine vibration. Q: Do I need special tools to install it? A: No special tools are needed. It is a straightforward cartridge replacement that installs by hand, so you can service your outboard at the dock or in your home garage. Q: What is the micron rating of this filter? A: This filter uses 20-micron filtration media to remove dirt, rust particles and water moisture from the fuel supply. Q: What are the installation steps? Ensure the engine is off and cool, and observe fuel safety precautions. Remove the old cartridge filter assembly by hand. Clean the mounting surface and check the O-ring area. Install the new cartridge and hand-tighten until snug. Do not over-tighten. Prime the fuel system, start the engine and check carefully for leaks. Package Includes 1 × 879884T Cartridge Type Fuel Filter Assembly Common Problems with OE/Aftermarket Fuel Filters — Solved by iFJF We analyzed verified customer reviews of OE and aftermarket alternatives. Here's what outboard owners keep complaining about — and how we fixed it: ❌ What Owners Complain About ✅ How iFJF Solved It "Cheap replacement filters leak at the housing." — Common complaint in aftermarket reviews → Precision-molded housing with snug O-ring fit Dimensional-matched to 879884T / 35-879884T and air-leak / pressure tested, engineered to resist leaks under fuel pressure and vibration. "Not sure if it fits my Mercury outboard." — Common concern in Q&A and reviews → Explicit fitment for 30-60HP EFI 4-stroke Covers 30HP, 35HP, 40HP, 50HP and 60HP 3 & 4-cylinder EFI 4-stroke engines — verify your engine type against our Cross-Reference table. "Aftermarket quality vs OEM — will it protect my engine?" — Common concern in reviews → 20-micron media + factory testing Removes dirt, rust and water moisture; every unit air-leak and pressure tested. Factory-direct value at a fraction of dealership pricing. 🔎 We read the 1-star and 2-star reviews so you don't have to. Every iFJF product is engineered to solve the real problems owners actually face — not just match a spec sheet. Factory Direct Supply & Wholesale — iFJF is a direct manufacturer of high-performance automotive and marine filtration products, backed by ISO 9001:2015 and IATF 16949:2016 quality management system certifications. Custom specifications and bulk orders are highly welcome. Contact us for exclusive dealer pricing and volume discounts. Email: support@ifjf.com