Anode kits are essential for protecting outboard engines, sterndrives, and other submerged boat components from galvanic corrosion.
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1-2 weeks delivery time Osculati 43.314.00 is a magnesium anode designed for Evinrude and Johnson outboard engines, replacing OEM part 395780. Specifically engineered for freshwater applications, it offers superior galvanic protection for submerged aluminium components. Its lightweight and high-reactivity magnesium composition ensures fast, reliable protection in low-conductivity water environments.
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$ 23.12
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1-2 weeks delivery time Osculati 43.316.20 is a zinc anode designed for the bearing carrier area of Evinrude and OMC outboards, replacing OEM reference 398873. It offers focused galvanic protection for one of the most corrosion-prone parts of the lower unit, making it essential for saltwater operation. Engineered for a precise fit, it helps extend the life of the bearing housing and surrounding components.
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$ 26.75
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1-2 weeks delivery time Osculati 43.316.33 is a U-shaped zinc anode designed for high-power Evinrude and OMC outboard engines ranging from 60 to 300 HP. Replacing OEM references 500789 and 433580, it provides targeted galvanic protection for exposed components in saltwater environments. Its wrap-around design ensures greater surface contact and corrosion shielding across wider engine surfaces.
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$ 47.30
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1-2 weeks delivery time Osculati 43.316.34 is a U-shaped aluminium anode designed for Evinrude and OMC outboards from 60 to 300 HP, replacing OEM references 500789 and 433580. Optimized for brackish and freshwater use, it protects large surface areas from galvanic corrosion while maintaining lightweight efficiency. Its U-profile design ensures wide coverage and compatibility with OEM mounts.
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$ 37.42
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1-2 weeks delivery time Osculati 43.316.35 is a magnesium U-shaped anode designed for Evinrude and OMC 60–300 HP outboards, replacing OEM parts 500789 and 433580. Optimized for use in freshwater environments, this highly reactive anode offers maximum protection for aluminium components such as gear housings and engine brackets. Its wrap-around design ensures wide surface coverage and OEM-accurate fit.
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$ 44.56
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1-2 weeks delivery time Osculati 43.317.22 is a magnesium foot cube anode designed to protect Evinrude and OMC outboards using OEM reference 377768. Its compact, cube-shaped form factor is ideal for mounting at the engine foot or lower unit area. Highly reactive and lightweight, magnesium is the optimal material for corrosion protection in freshwater environments, ensuring reliable preservation of submerged aluminium parts.
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$ 33.41
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1-2 weeks delivery time Osculati 43.316.00 is a zinc anode designed for small Evinrude and OMC outboard engines in the 4 to 8 HP range. Replacing OEM parts 334451 and 432397, it provides essential protection for exposed aluminium parts in saltwater environments. Its compact form and OEM-compatible fit make it ideal for routine maintenance of low-horsepower marine engines.
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$ 15.95
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1-2 weeks delivery time Osculati 43.316.10 is a double zinc anode for Evinrude and OMC outboards, replacing OEM reference 434029. Designed for saltwater environments, this anode protects twin contact points or broader surfaces from galvanic corrosion. Ideal for older or dual-location anode mounting systems on small to mid-size engines.
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$ 38.04
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1-2 weeks delivery time Osculati 43.315.30 is a zinc plate anode designed for small outboard engines from Evinrude and OMC. Replacing OEM part 338635, it fits 9.9–15 HP 2-stroke and 8–15 HP 4-stroke models. Ideal for saltwater conditions, this anode protects critical underwater components like the gearcase and brackets from galvanic corrosion while maintaining OEM fit and durability.
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$ 14.90
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1-2 weeks delivery time The Osculati 43.903.20 zinc leg plate anode is designed to fit Suzuki, Evinrude, and OMC outboards, replacing OEM part numbers 55320-95311, 5030265, and 5035786. This rectangular zinc anode provides targeted corrosion protection to the lower leg section of the engine, particularly in saltwater environments. Cast from high-purity zinc, it delivers effective galvanic shielding and installs easily using the original mounting points.
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$ 12.30
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Suzuki & 55320-95311 & Evinrude 5030265/5035786 & OMC Aluminium Leg Plate Anode - Osculati 43.903.21
1-2 weeks delivery time The Osculati 43.903.21 aluminium leg plate anode is engineered to replace OEM part 55320-95311 for Suzuki and 5030265 / 5035786 for Evinrude and OMC outboards. Manufactured from a high-performance Al-Zn-In alloy, it provides superior corrosion protection in saltwater and brackish conditions. The compact rectangular design fits the lower unit precisely, while the lightweight construction offers an eco-friendly alternative to traditional zinc anodes.
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$ 9.31
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1-2 weeks delivery time The Osculati 43.903.22 magnesium leg plate anode is an OEM-compatible replacement for Suzuki 55320-95311 and Evinrude/OMC 5030265 / 5035786. Optimized for freshwater environments, this lightweight anode offers highly active sacrificial protection for the outboard’s lower unit. Its magnesium construction provides superior electrochemical efficiency in low-conductivity water, making it ideal for lakes and rivers. Pre-drilled for direct, hassle-free installation.
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$ 15.07
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1-2 weeks delivery time The Osculati 43.640.04 zinc anode rod is a universal-fit corrosion protection component compatible with Mercury (8239121), Suzuki (55321-94900), Evinrude/Johnson (5034616 / 5030907), OMC, and Tohatsu engines. Designed to install inside cooling passages or threaded anode ports, this rod-type zinc anode offers essential protection against galvanic corrosion in saltwater applications across multiple outboard platforms.
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$ 54.62
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1-2 weeks delivery time The Osculati 43.640.14 aluminium anode rod is a lightweight, long-lasting alternative to zinc, compatible with multiple OEM references including Mercury 8239121, Suzuki 55321-94900, Evinrude/Johnson 5034616 / 5030907, OMC, and Tohatsu. Designed for threaded installation into internal cooling circuits, this rod-style aluminium anode offers excellent protection in saltwater and brackish environments with lower environmental impact.
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$ 41.04
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1-2 weeks delivery time The Osculati 43.640.17 magnesium anode rod is optimized for freshwater corrosion protection and compatible with a wide range of outboard and inboard engines. Designed to replace OEM part Mercury 8239121, Suzuki 55321-94900, Evinrude/Johnson 5034616 / 5030907, OMC, and Tohatsu, this internal threaded anode delivers aggressive sacrificial action in low-conductivity environments to protect cooling systems and internal engine metals.
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$ 49.21
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1-2 weeks delivery time Osculati 43.274.00 is a zinc plate anode designed for Evinrude 5031538 and OMC 40–50 HP 4-stroke outboards. Replacing OEM reference 55300-95500, this anode provides reliable protection against galvanic corrosion in saltwater environments. Its OEM-matched dimensions and mounting design ensure easy installation and long-lasting durability.
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$ 23.02
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1-2 weeks delivery time The Osculati 43.903.30 zinc plate anode is a direct-fit replacement for Evinrude and OMC outboard engines, matching OEM part number 5033167. Designed to protect submerged outboard components from galvanic corrosion, this rectangular zinc anode is ideal for saltwater use. Engineered to OEM dimensions, it ensures fast installation and reliable performance over time.
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$ 17.74
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Suzuki 55321-90J01 & Evinrude 5032930 & OMC 60/140 HP 4 ST Zinc Plate Leg Anode - Osculati 43.903.32
1-2 weeks delivery time The Osculati 43.903.32 zinc leg plate anode is a direct OEM replacement for Suzuki (55321-90J01), Evinrude (5032930), and OMC 60–140 HP 4-stroke outboards. Designed to protect the lower unit from galvanic corrosion, this rectangular anode is cast from marine-grade zinc for optimal performance in saltwater environments. It features OEM-compatible mounting and is ideal for long-term protection of submerged engine components.
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$ 10.16
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1-2 weeks delivery time The Osculati 43.903.38 aluminium leg plate anode is a direct-fit OEM replacement for Suzuki 55321-90J01, Evinrude 5032930, and OMC 60–140 HP 4-stroke outboards. Made from a premium Al-Zn-In alloy, it offers lightweight, eco-friendly, and long-lasting corrosion protection in saltwater and brackish water. Its rectangular design and pre-drilled OEM-compatible layout make it easy to install and effective in protecting the lower unit.
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$ 7.94
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1-2 weeks delivery time The Osculati 43.903.39 magnesium plate leg anode is a freshwater-specific OEM replacement for Suzuki 55321-90J01, Evinrude 5032930, and OMC 60–140 HP 4-stroke outboards. Made from high-purity magnesium, this anode offers the most active sacrificial protection in low-conductivity environments such as lakes and rivers. Lightweight, fast-acting, and easy to install thanks to OEM-matched pre-drilled mounting holes.
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$ 12.13
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What is an outboard engine anode, and how does it protect a motor from galvanic corrosion?
An outboard engine anode is a sacrificial metal component, such as a trim tab anode or shaft anode, designed to protect the motor from galvanic corrosion by attracting corrosive elements in the water. Installed on parts like the motor's ventilation plate, transom bracket, or propeller shaft, the anode corrodes instead of critical engine components, extending the lifespan of the outboard motor, especially in saltwater and brackish environments. Regular anode replacement ensures continuous protection for the boat motor and other submerged parts.
What is the importance of regularly replacing outboard motor anodes for corrosion protection?
Regularly replacing outboard motor anodes is essential to prevent galvanic corrosion, which can damage critical components like the engine, propeller, and transom bracket. Sacrificial anodes, such as bar anodes, trim tab zinc anodes, and ring anodes, corrode instead of the motor, protecting metal parts from deterioration in saltwater, brackish water, and freshwater. Using the correct alloy anode ensures long-term protection for outboards and boat zinc components, extending the engine’s lifespan and maintaining performance.
What factors determine the choice between aluminum, magnesium and zinc anode for boats?
The choice between zinc, aluminum, and magnesium anodes depends on the water environment where the boat operates. Zinc anodes are ideal for saltwater, aluminum anodes provide effective protection in both saltwater and brackish water, while magnesium anodes are best suited for freshwater. Using the correct anode ensures that essential components like outboard engines, transom brackets, and skegs are protected from galvanic corrosion, extending the lifespan of boat anodes and motor parts.
Additionally, proper maintenance of the cooling system, including timely Honda Impeller Replacement, helps prevent overheating and ensures efficient engine operation.