Mercury – Aluminum Anti-Ventilation Plate Anode Kit | Corrosion Protection | Aluminum | 8M0137814

Overview

Every boater knows that the quiet villains of the water aren’t waves or wind—they’re the unseen electrochemical forces constantly working against your engine’s metal parts. When you run a high-horsepower Mercury FourStroke or Verado, you want the confidence that your gear case and anti-ventilation plate are protected no matter where you launch. That’s where the Mercury 8M0137814 Aluminum Anti-Ventilation Plate Anode Kit steps in. It’s a simple set of parts that brings a surprising sense of relief, because once it’s installed, you know your engine is shielded from corrosion whether you’re cruising a freshwater lake at sunrise or pushing through brackish chop on a long coastal run.

Key Features

• Protects critical engine surfaces from galvanic corrosion
• Marine-grade aluminum construction for long-lasting durability
• Suitable for both freshwater and saltwater environments
• Includes two anti-ventilation plate anodes designed for a precise fit
• Easy installation using common hand tools
• Engineered to Mercury Marine’s original equipment standards

Engine & Boat Compatibility

• Mercury 175–300 horsepower 3.4L V6 FourStroke outboards
• Mercury 4.6L V8 FourStroke 200–300 horsepower models
• Mercury 5.7L V10 350–425 horsepower Verado outboards (serial number 3B266064 and up)
• Ideal for center consoles, bay boats, pontoons, offshore fishing vessels, and multi-species rigs powered by modern Mercury engines

Performance & Practical Benefits

Anodes don’t demand attention—until they do. And when corrosion sneaks into exposed metal, it can spread fast and leave you with repairs no boater wants to pay for. This aluminum anode kit adds a steady layer of protection where it matters most: the anti-ventilation plate, a key spot that often takes the brunt of electrochemical wear. Once installed, the anodes take on the corrosion themselves, preserving the tight, solid feel of your gear case and preventing unnecessary pitting or metal loss.

You’ll notice how secure everything feels season after season, because well-protected metal doesn’t lie—it stays smooth, strong, and ready for the next run. Aluminum anodes also hold up beautifully in mixed-water environments, offering consistent performance whether you’re boating in fresh lakes, salty channels, or anywhere in between. Installation is straightforward, making this an easy maintenance win that pays off every time you power up.

Why Buy OEM

When it comes to anodes, fitment and material quality are everything. Mercury’s OEM aluminum formula reacts exactly as intended, offering the right balance of protection without over-sacrificing or failing prematurely. Aftermarket alternatives often look similar but rarely match the precise casting, weight, and corrosion rate that Mercury engineers design specifically for these engines. Choosing OEM means less guessing, fewer surprises, and long-term peace of mind. You installed a Mercury engine for a reason—this is the kind of maintenance choice that keeps it performing the way it should.

FAQ

Q1: Which Mercury engines does the 8M0137814 anode kit fit?

It fits Mercury 175–300hp 3.4L V6 and 4.6L V8 FourStroke outboards, plus 5.7L V10 350–425hp Verado models with serial number 3B266064 and up.

Q2: What makes this kit different from aftermarket anodes?

OEM anodes are cast, sized, and formulated specifically for Mercury gear cases, ensuring predictable corrosion protection and proper fit.

Q3: How do I know if this is the correct anode for my engine?

Match your serial number and engine family with the compatibility list. When in doubt, checking your service manual is always helpful.

Q4: Can this kit be used in both freshwater and saltwater?

Yes—these aluminum anodes are designed for reliable performance in either environment.

Q5: Is installation simple for most boat owners?

Absolutely. With basic hand tools, most owners can replace these anodes in just a few minutes.