Engine, sterndrive, and outboard anodes are designed to protect submerged metal components from galvanic corrosion through sacrificial cathodic protection. They are used on marine engines, sterndrives, outboard lower units, propellers, trim tabs, and related underwater hardware where exposed metals require protection in saltwater, brackish water, or freshwater. Anodes are available individually or as complete kits, with different shapes, mounting configurations, and materials selected to match the specific engine or drive system.
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1-2 weeks delivery time Designed for Mercury, Mariner, or Force outboard engines, this zinc outboard bar anode matches OEM reference 818298, offering robust corrosion protection in marine environments. It is built from high-quality zinc for durability.
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$ 26.87
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1-2 weeks delivery time This zinc skeg anode is specifically designed to offer durable corrosion protection for Honda outboards. It is crafted according to OEM specifications for reliable performance in marine conditions. The OEM reference is 41107ZV500.
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$ 24.08
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1-2 weeks delivery time This skeg-mounted zinc anode is designed to fit Honda outboards and offers reliable protection against galvanic corrosion in saltwater environments. It's made of zinc, ensuring durability and long-lasting marine protection.
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$ 48.29
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1-2 weeks delivery time This wedge-style zinc anode is perfect for Mercury Mercruiser Gen 2 outboards, providing optimal performance and safeguarding against corrosion in marine settings. The zinc material offers dependable protection for your engine.
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$ 17.47
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1-2 weeks delivery time This transom bar zinc anode is compatible with Suzuki outboard systems, providing corrosion protection for engines between 70-140HP. Its zinc construction ensures effective defense in harsh marine conditions.
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$ 28.18
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1-2 weeks delivery time Engineered for OMC, Johnson, and Evinrude outboards, this zinc block anode offers robust protection against corrosion and electrolysis. Made from zinc, it ensures long-lasting defense in tough marine environments.
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$ 24.17
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1-2 weeks delivery time Designed for OMC, Johnson, and Evinrude engines, this zinc block anode prevents electrolysis, offering long-term corrosion protection. Its zinc material guarantees optimal engine performance in saltwater.
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$ 28.75
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1-2 weeks delivery time This zinc anode protects OMC, Johnson, and Evinrude V4/V6 engines from corrosion. Its zinc construction provides effective protection, ensuring long-lasting marine performance even in harsh environments.
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$ 15.50
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1-2 weeks delivery time This curved zinc anode is built for OMC, Johnson, and Evinrude systems, providing efficient protection against corrosion. It fits securely into marine setups, ensuring reliable performance in corrosive environments.
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$ 26.38
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1-2 weeks delivery time A replacement for 433580Z, this zinc anode offers critical protection for OMC, Johnson, and Evinrude marine engines against galvanic corrosion. Its zinc build ensures effective long-term engine protection.
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$ 30.46
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1-2 weeks delivery time This small horseshoe-shaped zinc anode offers targeted protection for key OMC, Johnson, and Evinrude engine components, safeguarding them from electrochemical degradation and ensuring reliable performance.
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$ 36.30
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1-2 weeks delivery time The waffle-style zinc anode is designed to protect OMC, Johnson, and Evinrude marine applications from corrosion. Its zinc material provides excellent protection, specifically for OEM 367 systems.
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$ 22.35
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1-2 weeks delivery time This reliable block-style zinc anode fits OMC sterndrives, offering effective protection against corrosion in harsh marine conditions. It meets OEM 984547 specifications for precise fit and function.
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$ 60.54
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1-2 weeks delivery time The horseshoe-shaped zinc anode is tailored for OMC sterndrives, built to withstand electrochemical wear. Its zinc construction ensures long-term protection for marine systems with OEM 983494 reference.
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$ 39.31
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1-2 weeks delivery time This zinc anode is designed for OMC and Johnson Evinrude engines, fitting as a transom plate to protect metal components from corrosion. Made of zinc, it provides reliable marine protection.
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$ 49.20
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1-2 weeks delivery time This zinc anode, designed as a cutdown skeg, is compatible with Suzuki outboard motors and provides essential protection against corrosion. Its zinc material ensures long-lasting defense in saltwater environments.
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$ 14.99
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1-2 weeks delivery time This small block-style zinc anode is tailored for Suzuki outboard engines, offering effective corrosion protection to help extend the motor's lifespan. It ensures durability with its zinc composition.
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$ 14.62
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1-2 weeks delivery time The standard skeg zinc anode is designed for Suzuki outboards, providing protection against galvanic corrosion on underwater parts. The zinc material ensures long-term effectiveness in marine environments.
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$ 20.23
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1-2 weeks delivery time Crafted for Volvo Penta saildrives, this zinc anode features a ring design with two mounting holes. It's specifically made for the S-120 model, offering reliable protection against corrosion in marine use.
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$ 23.84
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1-2 weeks delivery time This zinc anode is designed for Volvo Penta saildrives, featuring a ring shape with four mounting holes to fit the S-130 model, providing reliable protection against corrosion.
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$ 45.10
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What do engine, sterndrive, and outboard anodes protect?
Engine, sterndrive, and outboard anodes provide sacrificial cathodic protection for submerged or water-exposed metal components. Depending on the installation, anodes may protect lower units, gear housings, trim tabs, transom brackets, propeller areas, cooling passages, and other metal parts that are exposed to galvanic corrosion.
The anode is designed to corrode preferentially, helping protect more valuable engine and drive components from deterioration.
Why is regular replacement of engine and drive anodes important?
Sacrificial anodes are gradually consumed while protecting the surrounding metal components, so they must be inspected and replaced before too much material is lost. A heavily worn or missing anode can no longer provide effective protection, increasing the risk of corrosion on the engine, sterndrive, or outboard assembly.
Inspection frequency depends on operating conditions, water type, vessel usage, and the electrical environment around the boat.
How can I choose the correct anode for an engine, sterndrive, or outboard motor?
The correct anode should match the engine or drive manufacturer, model, installation position, dimensions, mounting arrangement, and required anode material. OEM part numbers or cross-reference numbers are often the most reliable way to identify the correct replacement.
Because similar engines and sterndrives may use different anodes depending on model year or configuration, compatibility should always be checked before installation.