Mercury – Cooling System Strainer | V6 & V8 FourStroke / Racing Series | Marine Polymer | 8M0142515

Overview

There is a certain comfort that comes from knowing your engine is protected, even when the water you are running through is less than perfect. Anyone who spends time offshore or navigating shallow, debris-prone channels knows how quickly small things can turn into big problems. That is why a dependable cooling system strainer matters more than most people realize. With the Mercury Marine part number 8M0142515, you get the kind of quiet, reliable protection that lets you stay focused on the day—whether that is chasing fish, cruising with family, or easing back toward the marina at sunset.

Key Features

• Helps keep debris out of the engine’s cooling system
• Marine-grade polymer construction built for long-term durability
• Exact factory replacement for Mercury and Mercury Racing models
• Includes strainer body and top fitting for a complete swap
• Designed and tested to meet original Mercury Marine performance standards

Engine & Boat Compatibility

• Fits Mercury 3.4L V6 FourStroke outboards, 175–225 horsepower
• Fits Mercury 4.6L V8 FourStroke outboards, 200–300 horsepower
• Compatible with Mercury Racing 3.4L V6 and 4.6L V8 engines, 150R–500R
• Common on center consoles, bay boats, pontoons, bass boats, and offshore sport boats

Performance & Practical Benefits

A cooling system works best when the water flowing through it is steady and clean, and this small but essential strainer plays a major role in keeping things that way. Once installed, you will notice the confidence that comes from a system running smoothly—no hiccups, no sudden temperature spikes, no second-guessing. The strainer’s tight, secure fit ensures water moves the way it should, while its internal screening keeps out the bits of grass, shell, and silt that would otherwise cause headaches.

Because the strainer is built to Mercury’s exact specifications, it seats perfectly and stays put, even during long, high-rpm runs. It is resistant to cracking, warping, and the kind of gradual wear that can sneak up on lesser parts. All of this adds up to a cooling system that feels steady, predictable, and ready for whatever kind of water the day brings.

Why Buy OEM

When you pick an original Mercury Marine part, you are choosing something that was engineered with your outboard in mind from the very beginning. There is no guessing on fit, no adapting, no “making it work.” It installs right the first time, keeps maintenance simple, and holds up season after season. While aftermarket parts may look similar, they rarely match the long-term reliability that comes with genuine Mercury design and testing. This is one of those parts where buying once—and buying right—makes all the difference.

FAQ

Q1: Which Mercury engines does the Mercury Strainer 8M0142515 fit?

It fits Mercury 3.4L V6 175–225 horsepower and 4.6L V8 200–300 horsepower FourStroke models, along with Mercury Racing 150R–500R engines.

Q2: What makes it different from aftermarket versions?

You are getting the exact geometry, materials, and durability Mercury designed specifically for these engines, ensuring a secure fit and proper water flow.

Q3: How do I confirm this is the right part?

Match your engine model and serial number range to the listed fitment. If those align, this is your replacement.

Q4: Can it be used in saltwater and freshwater?

Absolutely. It is built to handle both environments with strong corrosion-resistant materials.

Q5: Is installation straightforward?

Most boat owners find it simple—remove the old strainer, seat the new one, and reinstall the fittings. It is a clean, quick swap.