Mercury – High-Capacity Water-Separating Fuel Filter Kit | Fuel System | 35-8M0082291

Overview

On boats that pull a lot of fuel—big outboards, twins, maybe even a diesel sterndrive—you can’t afford to run a lightweight fuel filter setup. When the filter head can’t keep up, the engines stumble, hesitate, or fall flat when you really need them. This high-capacity kit gives you the vessel-mounted head that starts a proper fuel system. Add the fittings that match your hose and the right 10-micron filter, and you’ve got a setup that can feed steady fuel even on long, choppy runs or when the tank sloshes around.

Key Features

 • Built for 2-Stroke & 4-Stroke Outboards – Works on gas and diesel sterndrives and inboards too.
 • High-Flow Design – Moves up to 120 GPH, plenty for multi-engine rigs or thirsty motors.
 • Vessel-Mounted Filter Head – Sturdy base; fittings sold separately so you can match your plumbing.
 • Water-Separating Capability – When paired with the right filter, it knocks out debris and water before the engine ever sees it.
 • OEM Marine Construction – Holds up to salt, heat, vibration, and time.

Engine & Boat Compatibility

 • Outboards (2-stroke and 4-stroke)
 • Gas and diesel sterndrives
 • Diesel and gasoline inboards
 • Multi-engine fuel systems

Performance & Practical Benefits

A solid filter head makes the whole system feel steadier. Engines don’t cough when you hit the throttles, idle smooths out, and you’re less likely to deal with water-in-fuel problems after bad fuel stops. High-flow setups also help engines hold RPM in rough water because the pump isn’t starving for fuel every time the boat jumps or the tank sloshes.

Why Buy OEM

OEM parts simply line up right. The casting is clean, the threads are correct, and it seals the way it should. Cheaper heads corrode faster, warp, or don’t hold fittings tight—problems that can ruin a day on the water. With OEM, you’re buying something that’ll last.

FAQ

Q1: Does this kit include the filter?
A: No—this is the head only. Filters and fittings are sold separately.

Q2: Will this work for twin or triple outboards?
A: Yes. The 120-GPH flow rating is exactly what multi-engine setups need.

Q3: How often should I swap the filter?
A: Many boaters change it once a season—more often if you run into sketchy fuel.

Q4: Can I use this on diesel?
A: Yes, it’s suitable for diesel and gasoline systems.

Q5: What fittings do I need?
A: Brass or stainless, depending on your setup—just match thread and hose size.