MerCruiser Mercathode System

MerCruiser Mercathode System – Complete Corrosion Protection for MerCruiser Drives

The MerCruiser Mercathode System is a state-of-the-art corrosion prevention solution engineered by Mercury Marine to deliver round-the-clock protection for MerCruiser sterndrives and underwater metal components. Specifically designed for boats operating in saltwater or brackish water, this system actively combats galvanic corrosion, which can cause severe damage to lower units, propellers, trim tabs, and other submerged parts.

Unlike passive sacrificial anodes, the Mercathode System provides active corrosion control by delivering a controlled, low-voltage current to underwater metals. This current offsets the natural electrochemical reactions caused by dissimilar metals in contact with water, effectively neutralizing galvanic activity before it can cause harm. The result is extended lifespan and performance of your drive system.

The complete Mercathode System includes:

• Mercathode Controller – Regulates the electrical current and ensures consistent output.

• Anode Assembly – Acts as the active component to receive and distribute current.

• Wiring Harness and Hardware – All necessary components for secure installation and operation.

Once installed, the Mercathode System runs continuously while connected to your boat’s battery. It requires no user input and very little power to function, making it an efficient and maintenance-friendly solution. It is compatible with most MerCruiser Alpha and Bravo drives and can be used as a replacement for older systems or an upgrade to standard anode protection.

Built for reliability, this system is housed in marine-grade, corrosion-resistant materials to ensure long-term durability even in harsh environments. For best results, pair the Mercathode System with Mercury’s recommended sacrificial anodes and include it as part of your regular maintenance checks.

Protect your investment with confidence. The MerCruiser Mercathode System delivers intelligent, automatic protection—keeping your boat’s drive system in peak condition season after season.

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