Mercury Outboard Oil Change Kit – 75, 90 & 115 HP EFI Four-Stroke Engines (FC-W 25W-40)

The amount of oil included in this kit is adequate for most of the specifically noted Mercury outboard models. If your particular outboard requires additional oil, please be sure to purchase this separately.

Overview

Keep your Mercury EFI Four-Stroke engine performing at its best with this OEM oil change kit. Designed specifically for 75–115 HP EFI Four-Stroke models (2006–2014), this kit includes everything you need for a smooth and reliable oil change using Mercury’s most trusted marine oil.

Kit Contents

• 1 gallon + 2 quarts of Mercury FC-W 25W-40 Marine Engine Oil
• 1 × Mercury Oil Filter (35-877761K01, Genuine OEM)

Compatible Engines

• 75 HP EFI Four-Stroke (2006–2014)
• 90 HP EFI Four-Stroke (2006–2014)
• 115 HP EFI Four-Stroke (2006–2014)

Mercury FC-W 25W-40 Marine Engine Oil

Unlike automotive oils, Mercury’s 25W-40 FC-W Marine Oil is engineered specifically for marine conditions—developed over more than five years by the world’s largest marine engine manufacturer. Mercury 25W-40 Synthetic Blend Outboard Oil meets or exceeds the stringent marine operational requirements for all Mercury/MerCruiser 4-stroke marine engines and is first-in-class for FC-W durability with industry-leading internal corrosion protection.

Key benefits

• Approved for all 4-stroke marine engines: outboards, sterndrive/inboard, and high-performance models.
• Meets and exceeds FC-W® certification standards for marine engine protection.
• Outstanding corrosion resistance, wear protection, and viscosity stability under heavy load.
• Proven durability in both saltwater and freshwater environments.

Why this oil performs better

25W-40 Synthetic Blend shows superior shear stability and lower volatility, with higher viscosity and High-Temperature High-Shear (HTHS) after shear versus popular competitive formulations. Many competing oils rely on viscosity modifiers (VM) that can shear down at high RPM; Mercury’s formulation minimizes VM, helping it hold viscosity in high-revving, long-running conditions—improving bearing protection when the engine needs it most.

How to Use This Oil Change Kit

1. Warm the engine briefly so the oil drains more easily.
2. Drain the old oil by removing the plug and letting it flow into a container (replace the drain-plug gasket if worn).
3. Replace the old filter with the included Mercury 35-877761K01 filter.
4. Refill with the fresh oil from the kit.
5. Check the oil level, run the motor briefly, re-check level, and top off if needed. Verify no leaks.

Always confirm your exact oil capacity and torque settings in your Mercury owner’s manual.

Optional Add-On: Oil Analysis

Wondering how well your oil is protecting your engine—or want early warning on issues? PartsVu partners with Blackstone Laboratories to offer professional oil analysis kits. Results arrive by email within a few days, giving insight into engine wear and oil performance. Shop now.

Frequently Asked Questions

What is included in this Mercury Oil Change Kit?

This kit includes 1 gallon + 2 quarts of Mercury FC-W 25W-40 Marine Oil and one Mercury OEM oil filter (35-877761K01).

Which engines is this kit compatible with?

It fits Mercury EFI Four-Stroke outboards from 75–115 HP, covering 2006–2014 models.

How do I use this kit?

Warm the engine, drain the oil, replace the filter, refill with the included Mercury oil, and confirm the level according to your owner’s manual.

Where can I buy this kit?

This genuine Mercury oil change kit is available directly from PartsVu, an authorized Mercury dealer.

How much does it cost?

Prices vary depending on stock and promotions. Buying the kit is usually more cost-effective than purchasing oil and filters separately.