Mercury – Oil Filter | FourStroke Outboard Filtration | Steel Canister | 877761Q01

Overview

There’s a certain comfort that comes from knowing your engine is protected, even before you push away from the dock. When you spin on a fresh oil filter you trust, it feels like setting the tone for the entire day on the water — steady, reliable, and hassle-free. That’s exactly why so many boaters stick with this Mercury Marine part. The 877761Q01 Oil Filter gives you that sense of confidence before sunrise, whether you’re easing through no-wake zones or running wide open across open water. You know your engine’s getting clean lubrication every time it fires up, and that peace of mind is worth more than anything else you can bolt on.

Key Features

• Designed for select Mercury and Mariner 75–115 horsepower FourStroke outboards
• Compatible with the Mercury 150 horsepower EFI FourStroke
• Superior M-Pleated filtration media removes harmful oil contaminants
• Anti-drainback valve ensures proper lubrication at startup
• Heavy-duty, corrosion-resistant steel canister
• Screw-on design for simple installation with an oil filter wrench
• Built to Mercury Marine’s strict original equipment specifications

Engine & Boat Compatibility

• Mercury FourStroke 75–115 horsepower outboards (serial numbers 1B366823–2B094995)
• Mercury 150 horsepower EFI FourStroke
• Ideal for fishing boats, pontoons, aluminum rigs, center consoles, and general recreational outboards

Performance & Practical Benefits

A good oil filter isn’t just something you buy because the manual tells you to replace it. It’s something you feel working every time your engine settles into a smooth idle. With this filter, you’ll notice quicker lubrication on cold starts thanks to the anti-drainback valve that keeps oil where it needs to be. The heavy canister feels solid in your hand, and once installed, it stays sealed tight, even under long days of vibration, wake impacts, and high-RPM runs.

Mercury’s M-Pleated media pulls out the grit and microscopic debris that can rob your engine of longevity. You get cleaner oil circulating through the block, which translates to smoother throttle response, steadier temperatures, and reduced wear on your bearings and internal components. Maintenance becomes straightforward — no surprises, no blown seals, no guessing.

Why Buy OEM

When it comes to filtration, shortcuts end up costing more. This Mercury Marine part is built for the exact oil flow, pressure, and filtration needs of these specific FourStroke engines. Aftermarket filters often look similar, but the tolerances, media quality, and shell strength rarely match. With OEM, you know it’ll fit the first time, seal correctly, and deliver the protection these engines were engineered around.

It’s the kind of choice seasoned boaters make: practical, dependable, and based on real-world experience. Buy it once, trust it completely, and focus on enjoying your time on the water.

FAQ

Q1: Which Mercury engines does this oil filter fit?

It fits Mercury and Mariner FourStroke 75–115 horsepower models and the 150 horsepower EFI FourStroke.

Q2: What makes this different from aftermarket filters?

It uses Mercury’s M-Pleated media, has a thicker shell, and includes an anti-drainback valve engineered specifically for these engines.

Q3: How can I confirm it’s the right part?

Check your serial number and compare it to the range listed above. When in doubt, OEM always matches the original.

Q4: Can it be used in saltwater and freshwater?

Absolutely — the shell is corrosion-resistant and built for all environments.

Q5: Is installation straightforward?

Yes. A basic oil filter wrench and clean motor oil for the gasket are all you need.