Mercury – Oil Filter Element | Diesel Series Filtration | Synthetic Fiber Media | 879312041

Overview
Anyone who runs a diesel-powered MerCruiser knows how much confidence comes from a clean, well-filtered oil system. It’s the quiet reassurance you feel when you ease the throttles forward and the engine settles into that steady, dependable rhythm. A good oil filter doesn’t just protect your investment—it preserves that sense of trust between you and your boat. The Mercury 879312041 Oil Filter Element is one of those parts you can install and immediately feel good about, because you know it’s doing the unnoticed but essential work that keeps your diesel running smooth mile after mile.

Key Features

• Replacement 2.652 in. (67 mm) diameter oil filter element for MerCruiser diesel engines

• Long-life synthetic fibers maintain shape and filtration integrity under heat and pressure

• Designed for higher contaminant capture than standard paper elements

• Includes replacement filter element, center tube gasket, and o-ring

• Built to Mercury Marine OEM specifications for maximum engine protection

Engine & Boat Compatibility

• Fits 2008+ MerCruiser QSD 2.0L diesel engines

• Fits Mercury ES, ES150, ES170 diesel engines (various serial ranges)

• Fits Mercury EI 115, EI 130, EI 150, EI 170 diesel engines

• Common on diesel-powered cruisers, pilothouse boats, sport boats, and commercial vessels

• Installs into existing oil filter canister/reservoir assemblies

Performance & Practical Benefits
A diesel engine asks a lot of its oil, especially when you’re leaning into long cruise days, hauling heavy loads, or running in warm water. This filter is engineered to keep up with the higher pressures, heat cycles, and soot generation that come with diesel operation. You’ll notice the difference in the way your oil holds onto viscosity longer and how the engine maintains smoother, more predictable throttle response over time.

The synthetic media inside this filter doesn’t collapse or deform the way traditional paper elements can. That means tight, consistent filtration even after hours of running at mid-range speeds. It also gives the filter more surface area, allowing it to hold more contaminants before flow becomes restricted. The result? Cleaner oil, better lubrication, and a diesel that feels steady and unbothered—whether you’re idling out of the harbor or settling into a long, open-water run.

The included gaskets ensure a secure seal, giving you a snug, leak-free fit with no fuss. It’s a maintenance job that feels straightforward and satisfying, and you’ll know immediately that you’ve done something meaningful for your boat’s long-term health.

Why Buy OEM
With diesel engines, precision filtration is everything.

• Mercury OEM filters are built specifically for MerCruiser diesel oil systems

• Synthetic fibers provide superior contaminant control versus aftermarket paper filters

• Designed for proper flow rates and long-term durability in high-heat environments

• Helps extend engine life, turbocharger health, and oil longevity

• Guarantees a proper fit and eliminates the risk of poor sealing or bypass issues

When you’re counting on your engine to bring you home from miles offshore or to power through a long weekend of cruising, buying genuine Mercury Marine parts is one of the smartest decisions you can make.

FAQ

Q1: Which engines does the 879312041 Oil Filter Element fit?
It fits MerCruiser QSD 2.0L engines and a range of ES and EI diesel models within the listed serial numbers.

Q2: What sets this apart from aftermarket filters?
Its synthetic media traps smaller particles, handles heat better, and maintains structure far longer.

Q3: How do I confirm it’s the correct replacement?
Match your engine model and serial number to your owner’s or service manual.

Q4: Can this filter be used in both fresh and salt water conditions?
Yes—diesel filtration needs are the same in both environments.

Q5: Is installation simple for most boat owners?
Yes, most boaters find it easy since it fits directly into the existing canister system.