Mercury – MerCathode Anode Assembly | Corrosion Protection System | OEM Coated Metal | 8M0181304

Overview

When you run big power on the water, corrosion protection becomes more than maintenance—it becomes peace of mind. The Mercury 8M0181304 MerCathode Anode Assembly gives you that steady confidence every time you fire up your V10 or V12. It is the small but critical safeguard that helps you trust your engine whether you are cruising the shoreline or pushing hard miles offshore. Knowing your MerCathode system is working at full strength makes every trip feel smoother, safer and worry-free.

Key Features

• Replacement anode assembly for Mercury MerCathode corrosion protection systems
• Built from durable marine-grade materials engineered to deliver stable electrical performance
• Maintains proper function of the MerCathode controller and protective current output
• Designed for long-lasting reliability in harsh marine environments
• One complete anode assembly included

Engine & Boat Compatibility

• Compatible with Mercury 5.7L V10 350hp and 400hp outboards
• Fits Mercury 7.6L V12 500hp SeaPro and 600hp Verado outboards
• Intended for all high-horsepower Mercury outboard applications equipped with a MerCathode system
• Ideal for offshore center consoles, heavy commercial vessels, multi-engine rigs and high-load saltwater applications

Performance & Practical Benefits

This Mercury Marine anode assembly helps the MerCathode system maintain a steady, controlled protective current that shields your engine and gearcase from galvanic corrosion. The precision-engineered metal composition ensures consistent conductivity, helping the system respond quickly and accurately to changing water conditions. Once installed, it creates a tight, secure fit that feels solid and dependable—no rattles, no play, no inconsistent readings.

In day-to-day use, boaters notice smoother long-term performance from their corrosion-protection system and reduced wear on underwater components. The anode is built to withstand saltwater, temperature swings and constant spray, offering long service life with minimal attention required. It is a simple, reliable way to keep your investment protected and performing the way Mercury intended.

Why Buy OEM

When it comes to corrosion protection, guessing is never worth the risk. This genuine Mercury Marine part delivers the exact material formulation, fit and performance the MerCathode system depends on. Aftermarket anodes may look the same, but even small differences in alloy makeup or contact surface can limit system performance or shorten lifespan.

Choosing OEM means you are getting a part that has been engineered, tested and approved directly by Mercury. It lasts longer, performs correctly from day one and protects the expensive components you rely on. Experienced boaters will tell you—when it comes to corrosion control, always go genuine.

FAQ

Q1: Which engines does the MerCathode Anode Assembly 8M0181304 fit?

It fits all high-horsepower Mercury outboards, including V10 350/400hp and V12 500/600hp models.

Q2: What sets this apart from aftermarket anodes?

OEM anodes use the exact alloy and machining required for proper MerCathode function, ensuring reliable corrosion protection.

Q3: How can I confirm this is the correct replacement?

If your engine uses a MerCathode system and calls for this part number in the manual, this is the proper replacement.

Q4: Is it suitable for saltwater and freshwater?

Yes—this anode is engineered for both environments and performs exceptionally in high-salinity conditions.

Q5: Is installation straightforward?

Most boat owners can replace the anode with basic tools by following the owner’s manual. The fitment is precise and secure.