JLM MARINE Cartridge Fuel Filter for Mercury/Mariner Outboards 30–60 HP — Replaces 879884T, Water Separator

If your Mercury or Mariner outboard is running a 30, 35, 40, 50 or 60 horsepower motor, this cartridge filter replaces OEM part numbers 35-879884T and 879884T to help trap dirt, rust, water and other contaminants before they reach the fuel system. Lightweight and straightforward to install, the cartridge design is intended for routine maintenance schedules and season prep to reduce fuel-system wear and maintain reliable starting and throttle response.

How does this cartridge filter protect my outboard engine?

The filter captures particulates and free water that can accelerate wear in injectors, carburetors and fuel pumps. By removing contaminants upstream, the cartridge helps preserve fuel delivery components and supports steady engine performance across RPM ranges.

• Traps sediment and rust that enter fuel tanks or lines
• Separates free water to prevent corrosion and flooding of combustion chambers
• Reduces strain on fuel pumps and injectors for longer component life

Will this fit my Mercury / Mariner 30–60 HP outboard?

This JLM MARINE cartridge is manufactured to match the dimensions and specifications of Mercury/Mariner replacements for 35-879884T and 879884T. It is compatible with common 30HP, 35HP, 40HP, 50HP and 60HP outboard models that use the cartridge-style fuel element.

• Direct replacement for Mercury Mariner part numbers 35-879884T and 879884T
• Fits a wide range of 30–60 HP outboard applications
• Check your engine manual or existing filter model to confirm fit before purchase

How often should I replace the filter and how easy is installation?

Replace the cartridge according to your boat manufacturer's maintenance schedule or whenever you notice reduced engine performance or visible contamination. Installation is typically quick: remove the housing, swap the cartridge, and reseal—no special tools required for most setups.

• Recommended replacement interval follows engine manual or seasonally for stored boats
• Simple cartridge swap—inspect housing O-rings and seals while servicing
• Visually check fuel for discoloration or water between replacements

What are the practical benefits of choosing this JLM MARINE cartridge?

Using a correct-fit cartridge maintains consistent fuel flow and reduces the chance of clogs or engine hesitation, especially important in variable marine conditions. The part is designed to meet the functional specifications of the OEM filter so you can service your outboard without modifying fuel lines or mounts.

• OEM-compatible sizing and filtration performance
• Helps maintain smooth starts, idling and acceleration
• Cost-effective preventative maintenance for boat owners

Who this is for: boat owners, fishermen, rental operators and marine technicians running Mercury/Mariner 30–60 HP outboards who need a dependable replacement fuel cartridge that matches OEM part numbers 35-879884T and 879884T. If you perform routine maintenance on your outboard or prepare boats for seasonal use, this cartridge offers a straightforward, OEM-compatible option to help keep your fuel system clean and your engine running reliably.