Mercury – Water Separating Fuel Filter | MerCruiser 3.0L V6 Diesel | Marine-Grade Construction | 8M0135210

Overview

If you’ve spent enough time on the water, you know fuel quality can make or break a trip. One day everything runs clean and smooth; the next, a little moisture in the system can turn a simple cruise into a frustrating afternoon. That’s why a dependable water separating fuel filter isn’t just a convenience — it’s peace of mind. The Mercury Marine part 8M0135210 is built for the kind of boating where reliability matters, whether you’re running a long stretch down the coast or easing your way into a tight marina at sundown. It keeps your diesel engine protected so you can focus on the water, not what’s moving through your fuel lines.

Key Features

• Designed specifically for MerCruiser 3.0L V6 diesel sterndrive and inboard engines.
• Removes water and harmful debris from fuel before it reaches sensitive components.
• Helps maintain cleaner fuel flow for better efficiency and performance.
• Built with high-grade corrosion-resistant materials for harsh marine environments.
• Meets Mercury OEM filtration, capacity, and pressure requirements.
• Simple spin-on installation for fast, clean service.

Engine & Boat Compatibility

• MerCruiser 3.0L V6 diesel sterndrive engines.
• MerCruiser 3.0L V6 diesel inboard engines.
• Commonly used on cruisers, cabin boats, pilot boats, offshore fishing boats, and commercial vessels.
• Suitable for both recreational and heavy-duty diesel applications.

Performance & Practical Benefits

Diesel engines depend heavily on clean, water-free fuel, and this filter does the job without hesitation. You’ll notice the difference in everyday use — steadier idle, predictable throttle response, and fewer fuel-related hiccups when the water turns rough or the tank gets low. The filter captures fine debris before it can gum up injectors or pumps, and it separates out the water that naturally forms from condensation in marine tanks.

What you feel is confidence. The engine sounds tighter and runs smoother, especially during long periods of low speed or when pushing the boat hard against current or chop. Maintenance stays simple too. The spin-on design means you’ll spend less time wrestling with parts and more time actually boating. It’s the kind of part you install once and forget about until your next scheduled service — exactly how a marine filter should feel.

Why Buy OEM

There’s a reason experienced boaters stick with Mercury OEM filters. They’re built with the right filtration media, the right internal construction, and the right pressure capacity for the engine they’re protecting. Aftermarket filters may look similar from the outside, but inside, the quality varies wildly. Water separators are not a place to gamble. With this Mercury Marine part, you’re getting a filter engineered for your exact diesel system — one that fits properly, seals correctly, and protects your investment long-term. It’s practical, proven, and cost-effective in the ways that matter most.

FAQ

Q1: Which Mercury engines does this filter fit?

It’s designed for MerCruiser 3.0L V6 diesel sterndrive and inboard engines.

Q2: What makes this OEM filter better than aftermarket options?

The filtration media, flow rate, and internal construction are engineered specifically for Mercury diesel systems, ensuring proper performance and protection.

Q3: How do I confirm this is the correct replacement?

Check your engine model and verify that it's a MerCruiser 3.0L V6 diesel. If so, this is the correct filter.

Q4: Is it suitable for both saltwater and freshwater use?

Yes — the materials are built to withstand saltwater exposure, humidity, and constant engine heat.

Q5: Is installation straightforward?

Very. The spin-on design makes replacement quick and clean for most boat owners.