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 Marine-grade zinc anode kit designed for Volvo DPH drives prevents corrosion damage effectively in harsh marine conditions.
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$ 99.10
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1-2 weeks delivery time This zinc anode set is tailored for Volvo folding propellers with 3 blades, offering reliable galvanic corrosion protection in seawater.
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$ 43.89
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1-2 weeks delivery time The Zinc Anode Kit for Volvo SX drives is engineered to extend the life of critical underwater components by minimizing corrosion.
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$ 128.68
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1-2 weeks delivery time Designed for Volvo SX-A and DPS models, this corrosion-resistant zinc anode kit offers superior protection for underwater metal parts.
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$ 80.40
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1-2 weeks delivery time This zinc anode kit is specifically made for various Yanmar Saildrive models, providing complete protection for SD20, SD30, SD31, SD40, SD50, and SD60 drives.
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$ 164.99
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1-2 weeks delivery time Crafted for the bearing carrier of Mercruiser Alpha One Gen II sterndrives, this zinc anode offers OEM-level fitment and corrosion protection.
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$ 29.87
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1-2 weeks delivery time Specialized zinc anode shaped for lift-ram horseshoe applications on Mercruiser Alpha One Gen II drives, offering corrosion resistance for marine use. It is made of high-quality zinc and fits Mercury Mercruiser systems. The OEM reference is 806189.
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$ 7.12
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1-2 weeks delivery time This zinc plate anode is designed to fit Mercruiser Alpha One Gen II sterndrives, providing long-lasting corrosion resistance. Made from zinc, it offers excellent protection against marine corrosion, and the OEM reference is 821629.
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$ 32.92
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1-2 weeks delivery time Durable zinc button anode suitable for Alpha One and Bravo series sterndrives from Mercury Mercruiser. Its design ensures corrosion protection in saltwater environments. The OEM reference for this part is 55989.
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$ 6.18
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1-2 weeks delivery time OEM-style zinc anode crafted for lift-ram horseshoe setups on Bravo Gen II sterndrive systems. This part is engineered to fit specifically in these configurations and provides reliable corrosion defense. Its OEM reference is 806190.
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$ 13.14
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1-2 weeks delivery time Engineered to provide corrosion protection for Bravo Plate Gen 2 drives, this zinc anode is a necessary part of Mercruiser applications. It’s made from zinc and designed to withstand harsh marine environments. The OEM reference is 821630.
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$ 36.11
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1-2 weeks delivery time Designed for the Barrier Carrier system of Bravo 2 models, this zinc anode provides reliable protection against galvanic corrosion for Mercury Mercruiser components. It is made from durable zinc material and has the OEM reference 806188.
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$ 36.37
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1-2 weeks delivery time Tailored for Mercury Mercruiser Bravo 2 systems, this zinc anode matches reference 43994, offering crucial corrosion protection in marine applications. Made of high-quality zinc, its OEM reference is 821631.
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$ 50.50
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1-2 weeks delivery time This cutdown skeg anode provides effective corrosion resistance for Mercury Mercruiser setups in marine conditions. Crafted from zinc, it protects vital parts of the sterndrive system. The OEM reference is 46399.
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$ 19.40
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1-2 weeks delivery time This zinc anode prop nut assembly is designed for Mercury Mercruiser Alpha 1 and Bravo 1 drives, offering essential corrosion protection for stainless steel components in saltwater environments. It is made from zinc for optimal performance.
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$ 92.20
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1-2 weeks delivery time Specifically designed for Mercury Mercruiser Bravo 2 drives from 2003 onward, this zinc prop nut assembly provides corrosion protection during marine operation. Made from high-quality zinc, it is ideal for saltwater environments.
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$ 139.62
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1-2 weeks delivery time This zinc prop nut anode protects Mercury Bravo 3 drives from 2003 and older, ensuring long-lasting corrosion defense. Made from durable zinc, it’s a crucial part for preserving the drive system in harsh marine conditions.
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$ 200.22
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1-2 weeks delivery time Engineered to protect Mercury Bravo 3 drives from 2004 onwards, this zinc prop nut anode offers reliable corrosion protection. Its durable zinc construction ensures it performs well in marine environments.
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$ 18.30
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1-2 weeks delivery time This zinc circular plate anode offers effective corrosion control for Mercury drives and is engineered to match OEM reference 76214-5. Made from zinc, it ensures protection for the outboard system in saltwater environments.
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$ 17.63
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1-2 weeks delivery time This zinc skeg anode is designed to replace the OEM part 31640, providing corrosion protection and maintaining performance for Mercury Mercruiser setups. It is made from durable zinc material.
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$ 21.91
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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.