Mercury – High Capacity Water-Separating Fuel Filter Kit | Fuel System | 35-8M0082290

Overview

A lot of fuel problems—hesitation, weak hole-shot, rough idle—come down to dirty fuel or water making its way toward the engine. This high-capacity filter kit is the kind of setup boat mechanics like to install when a boat runs multiple engines or just pulls fuel hard. It includes the vessel-mounted filter head and a 10-micron, high-media filter that can keep up with big fuel demands. If you’ve ever had an engine lose power because the filter couldn’t keep up, this style of system is the fix that prevents that from happening again.

Key Features

 • High-Flow Design – Handles up to 120 gallons per hour for multi-engine or high-demand rigs.
 • 10-Micron Water-Separating Filter – Pulls out water and fine debris before they reach the engine.
 • Internal Epoxy Coating – Helps resist corrosion inside the housing.
 • Weather-Resistant Exterior – Painted finish stands up to salt spray and damp bilges.
 • Extra Filter Media – Over 25% more than many non-OEM filters for cleaner, longer service life.

Engine & Boat Compatibility

 • 2-stroke outboards
 • 4-stroke outboards
 • Gas and diesel sterndrives
 • Inboard engines
 • Multi-engine vessels using a vessel-mount filter system

Performance & Practical Benefits

A proper water-separating filter makes an immediate difference. Throttle response sharpens, idle smooths out, and the engine holds steady when running through chop or trimming up—because it’s finally getting clean, consistent fuel. The high flow rating keeps the system from starving the engine at higher RPM, which is a common issue on boats with undersized filters. You also get a clearer picture of fuel quality, which helps you catch water contamination early.

Why Buy OEM

OEM fuel systems match Mercury’s fuel-flow specs, filtration needs, and corrosion-resistance expectations. The housings last longer, the filters seal correctly, and the media inside is built for marine conditions—not automotive shortcuts. Aftermarket heads and filters can look similar but often fall short in flow, sealing, or water-separation performance.

FAQ

Q1: How do I know my fuel filter is getting clogged?
A: Hesitation when throttling up, rough idle, or the engine flattening out at higher RPM.

Q2: Does this kit include the fittings?
A: No—brass or stainless fittings must be purchased separately.

Q3: How often should the filter be replaced?
A: Many boaters replace it yearly, or sooner if they encounter bad fuel or water.

Q4: Will this work for twin or triple outboard setups?
A: Yes—the high flow capacity is built for multi-engine rigs.

Q5: Does this filter handle water contamination well?
A: Yes—the 10-micron marine media is designed to separate water before it reaches sensitive components.