Mercury – Magnesium Anode Kit | MR & Alpha One Series | Freshwater Protection | 888755K02

Overview

If you spend your weekends on freshwater lakes, you know how much trust you put in your sterndrive every time you throttle up. There’s a certain comfort in knowing your gear is protected, especially the parts you rarely see but rely on the most. The Mercury Marine part number 888755K02 Magnesium Anode Kit gives your MR or Alpha One drive the kind of protection that lets you relax, drift, cast, or cruise without wondering what corrosion might be doing below the surface. It’s a simple upgrade that brings real peace of mind — the kind that comes from knowing your boat’s heart is guarded and ready for the next trip.

Key Features

• Designed to protect MerCruiser MR and Alpha One sterndrives from galvanic corrosion
• Cast magnesium anodes provide maximum sacrificial protection in freshwater
• Fits 1984–1990 MR and Alpha One drives (serial 6225577 through 0D469828)
• Complete kit includes trim tab anode, gimbal nut anodes, drive shaft plate anode, and hardware
• Engineered to Mercury Marine specifications for proper fit and long-lasting performance
• Easy to inspect and replace during annual maintenance

Engine & Boat Compatibility

• Fits MerCruiser MR and Alpha One sterndrives from 1984–1990
• Ideal for freshwater environments only
• Common on runabouts, fishing boats, family cruisers, and classic recreational boats
• Suitable for single or twin-engine sterndrive setups

Performance & Practical Benefits

Magnesium anodes offer the highest level of corrosion protection in freshwater, and that’s exactly what makes the 888755K02 kit stand out. Once installed, these anodes act as the first line of defense against galvanic activity, sacrificing themselves to keep your sterndrive’s key components safe. You’ll feel the difference in quieter operation, smoother steering, and the confidence that comes from knowing your drive isn’t slowly being eaten away beneath the surface.

Fitment is tight and reliable — the sort of installation that feels like it’s meant to be there, because it is. You’ll appreciate the ease of swapping out each piece when the time comes, and you’ll likely notice how evenly magnesium wears in freshwater, giving you a clear picture of when it’s time for replacement. For boaters who store their vessel in the water for long stretches, this kit is truly essential. It shields the metal you depend on, reduces long-term repair costs, and helps keep your boat performing like it should season after season.

Why Buy OEM

Choosing an OEM Mercury Marine part means you’re not rolling the dice on metal quality or casting consistency. Magnesium purity matters, especially in freshwater, and Mercury’s anodes are engineered to dissolve at exactly the right rate to protect the rest of your drive. Aftermarket versions often look similar but rarely deliver the same longevity or reliability. With Mercury OEM, you get parts that fit, perform, and protect exactly the way the drive was designed to — no guesswork, no compromises.

FAQ

Q1: Which systems does the Magnesium Anode Kit 888755K02 fit?

It fits MerCruiser MR and Alpha One sterndrives made between 1984 and 1990 within the listed serial range.

Q2: What sets this OEM kit apart from aftermarket options?

Magnesium purity, correct casting, and engineering precision give it superior freshwater protection.

Q3: How can I confirm that this is the right replacement?

Match your drive’s serial number and model. If you have an MR or Alpha One within the stated range, it’s the correct kit.

Q4: Can these anodes be used in saltwater?

No — magnesium is designed exclusively for freshwater. For saltwater, choose aluminum or zinc.

Q5: Is installation simple for most boat owners?

Yes. The included hardware and straightforward layout make installation quick with basic tools.