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 This aluminum skeg anode is compatible with Honda, Mercury, Mariner, and Force outboards. It offers targeted corrosion resistance for the lower units of these outboard engines.
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$ 35
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1-2 weeks delivery time This aluminum skeg anode is designed for Honda, Mercury, Mariner, and Force outboards, offering reliable protection against corrosion for the lower units in marine environments.
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$ 47.10
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1-2 weeks delivery time Engineered for Mercury Mercruiser Gen 2 engines, this wedge-shaped aluminum anode provides corrosion protection in the wedge area of outboard motors, ensuring long-term durability.
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$ 12.41
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1-2 weeks delivery time This aluminum transom bar anode is designed for Suzuki outboards ranging from 70 to 140 horsepower. It helps prevent corrosion and prolong the lifespan of the engine’s transom area, ensuring better performance over time.
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$ 31.13
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1-2 weeks delivery time This aluminum anode is specifically designed for OMC, Johnson, and Evinrude marine engines. It provides essential protection against corrosion in saltwater environments, contributing to the longevity of the engine parts.
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$ 21.52
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1-2 weeks delivery time This aluminum anode block is made for OMC, Johnson, and Evinrude marine engines, offering reliable corrosion protection in harsh marine environments, ensuring the engine remains intact for longer periods.
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$ 23.50
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1-2 weeks delivery time Engineered for OMC, Johnson, and Evinrude V4 and V6 models, this aluminum anode block helps prevent corrosion and maintains the integrity of vital engine components for enhanced performance and durability.
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$ 20.66
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1-2 weeks delivery time This curved aluminum anode is designed for OMC, Johnson, and Evinrude engines, offering effective corrosion protection through its unique design that fits snugly against the engine’s surfaces for maximum coverage.
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$ 25.64
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1-2 weeks delivery time Serving as a replacement for part 433580z, this aluminum anode provides protection for OMC, Johnson, and Evinrude marine engines, ensuring extended durability and resistance to corrosion in saltwater conditions.
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$ 34.90
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1-2 weeks delivery time This small horseshoe-shaped aluminum anode is designed for OMC, Johnson, and Evinrude marine engines to offer effective corrosion protection while maintaining the efficiency and performance of the engine parts.
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$ 29.29
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1-2 weeks delivery time This waffle bar aluminum anode is compatible with OMC, Johnson, and Evinrude engines, designed to minimize corrosion and prevent damage caused by harsh saltwater environments, ensuring engine longevity.
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$ 21.91
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1-2 weeks delivery time This aluminum anode block fits OMC and Johnson Evinrude sterndrive systems, offering durable protection against corrosion and ensuring optimal performance in marine applications.
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$ 56.09
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1-2 weeks delivery time This horseshoe-shaped aluminum anode is made for OMC and Johnson Evinrude sterndrive engines, providing reliable protection against galvanic corrosion and prolonging the engine's lifespan in marine environments.
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$ 44.82
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1-2 weeks delivery time This transom plate aluminum anode is designed for OMC and Johnson Evinrude sterndrive marine equipment, offering reliable corrosion protection to maintain engine performance and ensure long-lasting use.
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$ 48.10
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1-2 weeks delivery time This aluminum anode cutdown skeg is made for Suzuki outboard engines, providing corrosion resistance and ensuring the durability of the engine in demanding marine environments.
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$ 11.19
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1-2 weeks delivery time This small block aluminum anode is designed for Suzuki outboard motors, offering reliable corrosion protection to extend engine life and maintain performance over time.
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$ 10.11
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1-2 weeks delivery time This aluminum anode, shaped as a standard skeg, is tailored for Suzuki outboard motors, providing effective corrosion resistance to ensure the engine operates efficiently and lasts longer.
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$ 25.43
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1-2 weeks delivery time This aluminum anode is specifically designed for Volvo Penta saildrives, featuring a ring design with two mounting holes, optimized for the S-120 model to offer reliable corrosion protection in marine conditions.
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$ 44.77
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1-2 weeks delivery time Designed for Volvo Penta saildrives, this aluminum anode features a ring shape with four mounting holes, providing reliable corrosion prevention for the S-130 model.
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$ 34.02
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1-2 weeks delivery time This aluminum bar anode is crafted for Volvo Penta sterndrives, ensuring dependable protection against corrosion in marine environments.
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$ 40.12
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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.