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 The Trem L8145304 anode is designed for Mercury and Mercruiser engines, offering vital corrosion protection and enhancing the longevity of engine components. It is identified as Polipodio article ME004, suitable for motors with 20-25 HP (FM-4 O.C.: 94286T1), and made from zinc (ZN) material.
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$ 25.34
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1-2 weeks delivery time The Trem L8145305 anode is designed for Mercury-Mercruiser engines, offering vital corrosion protection to extend engine life. It fits models FM-5 O.C. 9843296 with 15-25 HP 4T (post-1990) and is made from zinc.
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$ 34.47
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1-2 weeks delivery time The Trem L8145312 anode is specifically designed for Mercury-Mercruiser engines, featuring a model designation of F-D-20/M. It measures 20 mm in length, 8 mm in width, and 6 mm in height, and is made from zinc (ZN), ensuring effective corrosion protection and optimal performance.
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$ 9.26
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1-2 weeks delivery time The Trem L8245312 anode is designed for Mercury and Mercruiser engines, offering corrosion protection in marine environments. Made from durable aluminum (AL), it features dimensions of 20 mm (A), 8 mm (B), and 6 mm (C), ensuring long-lasting performance.
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$ 12.29
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1-2 weeks delivery time The Trem L8145311 anode is designed for Mercury-Mercruiser engines, offering reliable corrosion protection with durable zinc material. It features dimensions of 24 mm in length, 6.5 mm in thickness, and 5.5 mm in height, ensuring optimal performance and longevity for your engine components.
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$ 14.02
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1-2 weeks delivery time The Trem L8245311 anode is designed for Mercury-Mercruiser engines, providing reliable corrosion protection. With dimensions of 24 mm (A), 6.5 mm (B), and 5.5 mm (C), and made from durable aluminum, this Polipodio article ME006B/AL ensures long-lasting performance in marine environments.
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$ 13.43
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1-2 weeks delivery time The Trem L8143005 Anodes are vital for protecting Mercury-Mercruiser engines from corrosion, enhancing their longevity and performance. Designed for ALPHA ONE-BRAVO ONE series, these zinc anodes, with the original code FM-R 55989Q9, ensure reliable engine operation.
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$ 8.11
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1-2 weeks delivery time The Trem L8243005 anodes are vital for Mercury-Mercruiser engines, crafted from durable materials to enhance performance and protect against corrosion. They are associated with the Polipodio Article ME010AL and the original code 55989Q9, and are suitable for the ALPHA ONE-BRAVO ONE series.
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$ 10.06
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1-2 weeks delivery time The Trem L8145203 anode is designed for Mercury-Mercruiser engines, offering vital corrosion protection to enhance motor longevity. It is identified as the Polipodio Article ME008, model FM-7 BIS, with the original code 42121A2, suitable for motors with 6-9 and 9-15 HP (4T), and made from zinc (ZN).
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$ 7.45
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1-2 weeks delivery time The Trem L8145320 anode is designed for Mercury-Mercruiser engines, protecting components from corrosion and enhancing performance. It is compatible with motors ranging from 40 to 75 HP and 40 to 250 HP, and is made from high-quality zinc (ZN).
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$ 23.73
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1-2 weeks delivery time The Trem L8245320 anode is a durable component designed for Mercury-Mercruiser engines, protecting them from corrosion and ensuring smooth operation. Compatible with motors ranging from 40 to 250 HP, it features the original code 818298Q1 and is made from aluminum (AL), making it a reliable choice for maintaining engine performance.
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$ 28.85
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1-2 weeks delivery time The Trem L8143325 anodes are designed to protect Mercury and Mercruiser engines from corrosion, ensuring longevity and efficiency. Compatible with various horsepower ranges, including Mercury HP 50-75 and Mercruiser E.B. HP 90-100, these anodes are made from high-quality zinc material.
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$ 43.26
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1-2 weeks delivery time The Trem L8143013 anodes are vital for Mercury-Mercruiser engines, providing essential protection against corrosion to enhance engine performance and longevity. Designed for the FM-13 model and featuring stainless steel screws, these zinc anodes, with the Polipodio Article ME013 and Original Code 821629Q1 ALPHA ONE, are crucial for maintaining your boat's engine.
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$ 45.71
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1-2 weeks delivery time The Trem L8243013 anodes are engineered for Mercury-Mercruiser engines to enhance performance and durability by preventing corrosion. Essential for maintenance, these anodes feature the Polipodio Article ME013AL and the original code 821629Q1 ALPHA ONE, and are made from aluminum (AL).
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$ 38.51
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1-2 weeks delivery time The Trem L8143014 anodes are designed to protect Mercury-Mercruiser engines from corrosion and wear, ensuring their longevity and efficiency. Key features include the Polipodio Article ME014, Model FM-14, Original Code 821630Q1, Series BRAVO, and they are made from ZN material.
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$ 40.58
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1-2 weeks delivery time The Trem L8243014 anodes are specifically designed for Mercury-Mercruiser engines, offering high-quality corrosion protection to enhance engine longevity and efficiency. Key features include the Polipodio Article ME014AL, the original code 821630Q1 from the BRAVO series, and construction from durable aluminum (AL).
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$ 41.30
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1-2 weeks delivery time The Trem L8143012 anodes are designed to protect Mercury-Mercruiser engines from corrosion, ensuring optimal performance and longevity for marine propulsion systems. Made with high-quality materials, including ELICA INOX HP 50/140 BRAVO ONE (822777Q1) and featuring a zinc composition, these anodes are an essential accessory for maintaining your engine's health.
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$ 27.85
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1-2 weeks delivery time The Trem L8143117 anodes are designed to protect Mercury and MerCruiser engines, enhancing durability and reliability by preventing corrosion and prolonging engine life. Key specifications include Polipodio Article ME017, Model FM-15, Original Code 806189Q1 ALPHA ONE, and they are made from ZN material.
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$ 6.42
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1-2 weeks delivery time The Trem L8243117 is a high-quality anode designed for Mercury-Mercruiser engines, which enhances performance and extends engine life. It features the Polipodio article, model ME017AL, and is compatible with the original code 806189Q1 ALPHA ONE, made from aluminum (AL).
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$ 9.04
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1-2 weeks delivery time The Trem L8145310 anode is specifically designed for Mercury-Mercruiser engines, offering optimal protection and performance. Made from durable ZN material, it fits motors with a horsepower range of 75 to 250, ensuring the longevity and integrity of your engine.
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$ 10.31
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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.