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 The Osculati 43.433.03 zinc anode is specifically designed for Mercury 4 and 6 HP outboards, replacing OEM part 875208. Ideal for saltwater environments, this anode safeguards small engine components by redirecting galvanic activity away from critical metals. Compact and easy to install, it offers reliable corrosion protection for the lower unit and exhaust plate.
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€ 13,34
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1-2 weeks delivery time The Osculati 43.433.04 aluminium anode is a lightweight and high-efficiency corrosion protection component designed for Mercury 4 and 6 HP outboards, fully compatible with OEM part 875208. Its aluminium alloy composition makes it suitable for saltwater and brackish water use, offering longer service life and reduced environmental impact compared to zinc alternatives.
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€ 9,57
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1-2 weeks delivery time The Osculati 43.434.10 zinc anode is designed for Mercury 2-stroke and 4-stroke outboards from 30 to 200 HP, including Superamerica models, and corresponds to OEM part 818298A1. Featuring four bores for secure attachment to engine rods or brackets, this anode delivers critical saltwater corrosion protection. Its solid marine-grade zinc construction ensures high durability in aggressive marine environments.
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€ 19,61
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1-2 weeks delivery time The Osculati 43.434.11 aluminium anode is an OEM-equivalent corrosion protection solution for Mercury 2-stroke and 4-stroke outboards from 30 to 200 HP, including Superamerica variants. Replacing Mercury part 818298A1, it features a four-bore configuration for reliable attachment to engine rods or brackets. Made from cadmium-free aluminium alloy, this anode offers enhanced protection in saltwater and brackish water environments, with longer life and reduced environmental impact compared to zinc.
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€ 14,80
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1-2 weeks delivery time The Osculati 43.434.12 magnesium anode is specifically designed for Mercury outboards from 30 to 200 HP, including both 2-stroke and 4-stroke engines and Superamerica models. It replaces OEM part 818298A1 and features a 4-bore configuration for stable mounting on engine rods or brackets. Ideal for freshwater operation, this high-purity magnesium alloy anode offers the most active galvanic protection available, making it the top choice for low-conductivity environments.
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€ 17,72
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1-2 weeks delivery time The Osculati 43.434.30 zinc plate anode is a direct replacement for Mercury 150 HP 4-stroke outboards using OEM reference 8M0057772. Designed for installation on the lower unit, this wide-surface zinc anode protects submerged engine components against galvanic corrosion in saltwater environments. Its flat plate profile ensures uniform wear and full OEM compatibility.
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€ 21,75
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1-2 weeks delivery time The Osculati 43.434.31 aluminium plate anode is a lightweight, high-efficiency alternative to zinc, designed for Mercury 150 HP 4-stroke outboards (OEM ref. 8M0057772). This plate-style anode provides wide-surface cathodic protection for submerged components and is ideal for use in saltwater and brackish water. Its OEM-equivalent dimensions ensure reliable mounting to the lower unit.
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€ 11,37
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1-2 weeks delivery time The Osculati 43.434.32 magnesium plate anode is a freshwater-optimized corrosion protection solution for Mercury 150 HP 4-stroke outboards, equivalent to OEM part 8M0057772. Featuring a wide flat surface, this anode provides maximum coverage and sacrificial action in low-conductivity waters. Made of high-purity magnesium, it offers the highest electrochemical activity for internal and external engine component protection.
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€ 25,68
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1-2 weeks delivery time The Osculati 43.434.50 zinc anode is a direct-fit replacement for Mercury V6 and V8 outboards using OEM part 8M0137814. Engineered for aggressive saltwater environments, this anode is essential for protecting large outboard powerheads and lower units from galvanic corrosion. Its durable marine-grade zinc construction ensures consistent performance and longevity under demanding marine conditions.
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€ 48,05
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1-2 weeks delivery time The Osculati 43.436.50 aluminium anode is designed for Mercury V6 and V8 outboards and replaces OEM part 8M0137814. Built from a lightweight, cadmium-free aluminium alloy, this anode provides durable galvanic protection in saltwater and brackish environments. Its broad coverage and direct-fit design ensure reliable defense for critical engine components like the lower unit, mounting surfaces, and water passages.
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€ 31,68
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1-2 weeks delivery time The Osculati 43.438.50 magnesium anode is a highly reactive corrosion protection component for Mercury V6 and V8 outboards, compatible with OEM part 8M0137814. Specifically designed for freshwater use, this plate-style anode delivers maximum cathodic protection for lower units, gearcases, and mounting points by sacrificing itself in low-conductivity environments. It offers a precise OEM-equivalent fit and high-purity magnesium composition.
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€ 38,23
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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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€ 18,76
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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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€ 12,18
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1-2 weeks delivery time The Osculati 43.640.16 aluminium ring anode is a direct replacement for Mercury OEM reference 823912 and features a 24×7 mm profile. Designed for shaft or rod installation, it provides targeted galvanic protection in saltwater and brackish water applications. Lightweight and cadmium-free, this compact ring-type anode is ideal for small outboards and auxiliary systems requiring localized corrosion resistance.
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€ 8,11
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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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€ 22,32
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1-2 weeks delivery time The Osculati 43.822.15 zinc fin anode is a direct replacement for Mercury outboards from 25 to 50 HP, both 2-stroke and 4-stroke, using OEM part 822157-C2. Designed to mount under the cavitation plate, this anode combines galvanic protection with steering torque compensation. Constructed from marine-grade zinc, it is ideal for saltwater use and ensures long-lasting protection against corrosion.
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€ 17,64
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1-2 weeks delivery time The Osculati 43.822.16 aluminium fin anode is an OEM-equivalent replacement for Mercury 25 to 50 HP outboards (2-stroke and 4-stroke), referencing part 822157-C2. Designed to mount beneath the anti-ventilation plate, this torque tab anode delivers effective corrosion protection in saltwater and brackish environments, while also providing steering torque compensation. Aluminium alloy offers longer life, lower weight, and reduced environmental impact compared to zinc.
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€ 11,95
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1-2 weeks delivery time The Osculati 43.822.17 magnesium fin anode is designed for Mercury 25 to 50 HP 2-stroke and 4-stroke outboards, replacing OEM part 822157-C2. Ideal for freshwater use, it combines lightweight construction and maximum reactivity to protect the engine’s lower unit from galvanic corrosion. Its integrated torque tab helps offset propeller forces for improved directional stability.
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€ 22,21
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1-2 weeks delivery time The Osculati 43.823.91 zinc washer anode (Ø 20×7 mm) is a compact anti-corrosion component compatible with Tohatsu (338-60218-2), Suzuki (11130-94600), Evinrude, OMC, and Selva outboards. Designed for internal or shaft-based protection, this small-format anode delivers targeted sacrificial action in saltwater environments, preserving key engine fittings and cooling system parts.
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€ 12,67
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1-2 weeks delivery time The Osculati 43.823.92 aluminium washer anode (Ø 20×7 mm) is a high-efficiency anti-corrosion solution compatible with Mercury (823912), Tohatsu (338-60218-2), Suzuki (11130-94600), and selected Evinrude, OMC, and Selva engines. Designed for use on shafts or threaded fasteners, this cadmium-free aluminium anode is ideal for saltwater and brackish water applications where lightweight and long-lasting protection is required.
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€ 10,56
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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.