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 OMC, Johnson, and Evinrude V4 and V6 models, this magnesium anode block (OEM 393023) offers effective protection from marine corrosion.
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$ 29.41
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1-2 weeks delivery time This curved magnesium anode block fits OMC, Johnson, and Evinrude engines and enhances corrosion protection in harder-to-reach areas. It corresponds to OEM number 431708.
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$ 32.92
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1-2 weeks delivery time Replacing OEM part number 433580z, this Allpa Magnesium Anode provides continued corrosion protection for OMC, Johnson, and Evinrude engines, now referenced as 5007089.
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$ 46.49
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1-2 weeks delivery time Shaped like a small horseshoe, this Allpa Magnesium Anode is ideal for OMC, Johnson, and Evinrude engines, offering solid corrosion resistance under OEM part 392462.
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$ 51.36
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1-2 weeks delivery time The waffle bar-shaped Allpa Magnesium Anode fits OMC, Johnson, and Evinrude engines and is designed to combat corrosion. It matches OEM reference 367.
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$ 27.75
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1-2 weeks delivery time This Allpa Magnesium Anode Block suits OMC and Johnson Evinrude sterndrives and matches OEM number 984547, providing effective corrosion defense.
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$ 64.29
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1-2 weeks delivery time Designed in a horseshoe shape, this magnesium anode fits OMC and Johnson Evinrude sterndrives. It helps protect marine equipment and matches OEM number 983494.
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$ 58.10
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1-2 weeks delivery time This transom plate magnesium anode from Allpa is suitable for OMC and Johnson Evinrude sterndrives, offering protection against corrosion. It replaces OEM 984513.
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$ 61.15
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1-2 weeks delivery time Tailored for Suzuki outboard motors, this cutdown skeg anode provides long-lasting corrosion protection. It corresponds to OEM part number 55125-9630.
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$ 16.56
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1-2 weeks delivery time This small block magnesium anode is made for Suzuki outboards, ensuring resistance to corrosion and prolonging engine life. It replaces OEM part 55320-95310.
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$ 12.87
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1-2 weeks delivery time This magnesium anode is designed for Suzuki outboard motors and fits the standard skeg, offering reliable corrosion protection to enhance performance and longevity in marine environments.
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$ 17.10
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1-2 weeks delivery time Engineered for Volvo Penta Saildrive S-120, this magnesium anode features a two-hole ring design, providing effective corrosion resistance in marine conditions.
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$ 77.91
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1-2 weeks delivery time Designed for the Volvo Penta Saildrive S-130, this ring-shaped magnesium anode with four mounting holes ensures a secure fit and dependable protection against corrosion.
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$ 57.91
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1-2 weeks delivery time Tailored for Volvo Penta Sterndrive units, this bar-shaped magnesium anode offers strong and lasting corrosion protection for extended marine equipment life.
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$ 25.38
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1-2 weeks delivery time This magnesium anode is made specifically for the DP-X drive in Volvo Penta Sterndrives, providing efficient corrosion resistance in harsh saltwater conditions.
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$ 101.83
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1-2 weeks delivery time Shaped like a dog bone, this magnesium anode is made for Volvo Penta Sterndrive models AQ250, AQ270, and AQ280 to deliver targeted corrosion protection.
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$ 42.50
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1-2 weeks delivery time Designed for Volvo Penta sterndrives, this Duo-Prop ring magnesium anode offers optimal corrosion protection in a ring configuration.
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$ 30.46
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1-2 weeks delivery time This magnesium anode functions as a gimbal plate for Volvo Penta SX-Drive sterndrives, providing durable protection from corrosion.
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$ 56.77
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1-2 weeks delivery time Made for SXA and DP-X Volvo Penta models, this magnesium anode serves as a high-performance transom shield to protect against marine corrosion.
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$ 31.99
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1-2 weeks delivery time Engineered for Volvo Penta AQ-280 and AQ-290 sterndrives, this large ring magnesium anode offers strong anti-corrosion defense in marine settings.
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$ 32.55
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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.