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.
|
1-2 weeks delivery time Designed for the Bravo Trim Cylinder, this Navalloy Mercury aluminum anode offers protection against corrosion and wear, helping maintain smooth trim system operation for years.
|
$ 19.16
-
+
| ||
|
1-2 weeks delivery time This aluminum anode helps protect the Gimbal Housing Block from corrosion, keeping your boat’s gimbal housing in excellent condition and ensuring reliable performance and longevity.
|
$ 30.27
-
+
| ||
|
1-2 weeks delivery time This anode is designed for use with the gimbal housing bolt in Mercury outboard and sterndrive engines, helping protect against corrosion and extending engine component life.
|
$ 20.07
-
+
| ||
|
1-2 weeks delivery time This manifold anode, made from Navalloy Mercury aluminum, protects the manifold assembly from corrosion, maintaining the integrity of your engine's exhaust system.
|
$ 24.92
-
+
| ||
|
1-2 weeks delivery time Designed for outboard power trim systems, this anode helps prevent damage caused by electrolysis, with a durable aluminum construction ideal for harsh marine environments.
|
$ 24.75
-
+
| ||
|
1-2 weeks delivery time This prop anode is designed for Bravo 3 outdrive models built after 2004, providing essential protection from corrosion around the propeller area and ensuring reliable outdrive performance.
|
$ 21.98
-
+
| ||
|
1-2 weeks delivery time This trim cylinder anode is designed to protect the trim system of Mercury outboards and sterndrives from electrolysis and corrosion, maintaining optimal performance over time.
|
$ 12.82
-
+
| ||
|
1-2 weeks delivery time This aluminum anode is designed to protect your boat's trim tabs from corrosion and electrolysis, ensuring efficient functioning of the trim tab system in saltwater environments.
|
$ 23.96
-
+
| ||
|
1-2 weeks delivery time This high-quality aluminum anode is specifically designed for use with marine trim tabs, protecting them from corrosion and ensuring the longevity of your boat’s trim tab system.
|
$ 25.56
-
+
| ||
|
1-2 weeks delivery time The Navalloy Mercury Aluminum Anode, Trim Tab Anode Flat (No Thread) is a durable, flat anode designed to protect trim tabs and maintain the integrity of marine equipment. Made from aluminum, it ensures efficient corrosion resistance.
|
$ 25.56
-
+
| ||
|
1-2 weeks delivery time The Navalloy Side Pocket Aluminum Anode for Mercury 826134T & Honda 41109-ZW1-003 is a high-quality anode designed to protect marine engines from corrosion. Constructed from aluminum, it ensures durability in both saltwater and freshwater environments.
|
$ 15.15
-
+
| ||
|
1-2 weeks delivery time This variant of the Navalloy Side Pocket Aluminum Anode is also compatible with Mercury 826134T and Honda 41109-ZW1-003 models. Built with marine-grade aluminum, it provides excellent protection against corrosion for enhanced engine performance.
|
$ 15.15
-
+
| ||
|
1-2 weeks delivery time The Yamaha 150HP Navalloy Anode Kit provides corrosion protection for Yamaha 150HP engines, ensuring the longevity and optimal performance of the engine in harsh marine environments.
|
$ 61.71
-
+
| ||
|
1-2 weeks delivery time The Yamaha 200-250hp, 4 Stroke Navalloy Anode Kit offers superior protection against corrosion for Yamaha 200-250hp 4-stroke engines, ensuring reliability and performance over time.
|
$ 65.17
-
+
| ||
|
1-2 weeks delivery time The Yamaha Navalloy Transom Anode is designed to protect the transom of Yamaha engines from corrosion, ensuring the longevity of the engine in marine conditions.
|
$ 31.60
-
+
| ||
|
1-2 weeks delivery time The Yamaha Navalloy Trim Tab 200-250hp, 4 Stroke Anode protects the trim tab of Yamaha 200-250hp 4-stroke engines, preventing corrosion and maintaining optimal functionality.
|
$ 46.36
-
+
| ||
|
1-2 weeks delivery time The Yanmar Saildrive Magnesium Anode Without Adapter is designed to protect Yanmar Saildrive systems (SD20, SD30, SD31, SD40, SD50, and SD63) from corrosion. Made from high-quality magnesium, this anode helps ensure the longevity and reliability of the saildrive system by preventing galvanic corrosion in harsh marine environments.
|
$ 74.11
-
+
| ||
|
|
1-2 weeks delivery time The Yanmar Saildrive Zinc Anode offers corrosion protection for Yanmar Saildrive models SD20, 30, 31, 40, 50, and 60 without the need for an adapter, ensuring long-lasting performance in the water.
|
$ 66.61
-
+
| ||
|
1-2 weeks delivery time This aluminum anode bar is designed for Honda outboard engines within the 75 to 115 horsepower range, providing effective protection against corrosion for marine equipment.
|
$ 66.96
-
+
| ||
|
1-2 weeks delivery time This small aluminum anode bar fits Honda outboard motors between 35 and 50 horsepower, offering corrosion protection optimized for smaller engines.
|
$ 36.53
-
+
| ||
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.