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 43.424.15 is a lightweight aluminium anode for Mercury Verado outboards, replacing OEM references 892227 and 893404. Designed for optimal protection in saltwater and brackish conditions, it offers reliable galvanic protection for lower units and structural components, while reducing weight and environmental impact.
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$ 18.84
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1-2 weeks delivery time The Osculati 43.424.41 aluminium flange anode is a precision-engineered replacement for Mercury Verado applications referencing OEM part 847-635001. Designed for installation on gearbox or transom-mounted areas, this disc-shaped anode ensures wide surface contact for effective cathodic protection. Manufactured from marine-grade aluminium alloy, it performs reliably in saltwater and brackish environments, combining durability, low environmental toxicity, and efficient corrosion prevention.
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$ 34.18
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1-2 weeks delivery time The Osculati 43.426.00 zinc fin anode is a direct replacement for Mercury 18–25 HP outboards using OEM part 94286. Designed to mount beneath the anti-ventilation plate, this fin-shaped anode protects submerged metal parts from galvanic corrosion while assisting with directional stability. Manufactured from high-purity zinc alloy, it is optimized for saltwater use and ensures long-lasting protection for smaller Mercury outboard engines.
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$ 32.67
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1-2 weeks delivery time The Osculati 43.427.40 magnesium flange anode is designed for Mercury Verado outboards using OEM reference 847-635001. Built for freshwater applications, this anode offers highly active corrosion protection due to magnesium’s superior electrochemical potential. The wide flange design ensures full surface coverage, providing maximum protection for gear housings, brackets, or transom-mounted components in low-conductivity water environments.
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$ 41.06
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1-2 weeks delivery time OEM-style fin anode for Yamaha 2-stroke and 4-stroke outboards, 150–225 HP, reference 6J9-45371-00. With a diameter of 100 mm, this anode is mounted under the anti-ventilation plate and provides effective galvanic protection in saltwater environments. Its hydrodynamic shape also helps reduce steering torque and improve directional stability.
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$ 46
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1-2 weeks delivery time Magnesium directional fin anode for Yamaha 200–300 HP outboards, OEM reference 69L-45371-00. With a diameter of 100 mm, this fin-type anode mounts beneath the anti-ventilation plate to protect submerged components in freshwater environments. Magnesium offers the highest galvanic activity, making it ideal for low-conductivity conditions while reducing steering torque thanks to its integrated hydrodynamic fin.
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$ 48.37
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1-2 weeks delivery time OEM-style aluminium directional fin anode for Yamaha 200–300 HP outboards, equivalent to reference 69L-45371-00. With a 100 mm diameter, this anode is mounted beneath the anti-ventilation plate and offers dual functionality: effective galvanic protection in saltwater and brackish conditions, and compensation for propeller torque through its hydrodynamic fin shape. Made from high-efficiency aluminium alloy for extended service life.
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$ 33.89
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1-2 weeks delivery time Zinc directional fin anode designed for Yamaha 200–300 HP outboards, OEM reference 69L-45371-00. With a diameter of 100 mm, it mounts beneath the anti-ventilation plate, providing reliable galvanic protection in saltwater environments. Its hydrodynamic fin design also reduces steering torque caused by propeller thrust, maintaining directional stability and engine efficiency.
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$ 47.79
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1-2 weeks delivery time Aluminium fin anode with rightward bend for Yamaha outboards 90–200 HP and above, equivalent to OEM reference 6E5-45371-01. Designed for standard (right-hand) rotating propellers, this 92 mm trim anode mounts beneath the anti-ventilation plate, reducing steering torque and protecting the lower unit from galvanic corrosion in saltwater and brackish environments.
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$ 32.82
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1-2 weeks delivery time Magnesium support anode designed for Yamaha 100–300 HP outboards, OEM reference 6G5-45251-01/02. Ideal for freshwater applications, it mounts on the lower unit or support bracket, delivering highly active galvanic protection in low-conductivity environments. Magnesium ensures fast and reliable corrosion control, safeguarding critical engine components during inland water use.
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$ 61.43
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1-2 weeks delivery time Oblong zinc anode compatible with Yamaha outboards, OEM reference 6AW-45251-00. Designed for installation on the gear housing or lower unit, this anode ensures long-term galvanic protection in saltwater environments. Zinc remains the most widely used anode material for traditional marine conditions, offering reliable corrosion resistance for submerged metal surfaces.
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$ 51.61
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1-2 weeks delivery time OEM-style aluminium oblong anode for Yamaha outboards, reference 6AW-45251-00. Designed to protect the lower unit or gear housing, this anode offers efficient corrosion resistance in saltwater and brackish water. Aluminium provides longer service life, lighter weight, and reduced environmental impact compared to zinc, making it ideal for modern marine use.
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$ 38.92
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1-2 weeks delivery time Magnesium oblong anode compatible with Yamaha outboards, OEM reference 6AW-45251-00. Engineered for installation on the gear housing or lower unit, this anode provides superior galvanic protection in freshwater environments. Magnesium's high electrochemical activity ensures rapid and efficient corrosion defense in low-conductivity inland waters.
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$ 57.18
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1-2 weeks delivery time Zinc anode with threaded plug, OEM reference Yamaha N51-11325-01, for use in onboard and outboard engines. Installed in the cooling water passages of the engine block, this anode protects internal components from galvanic corrosion in saltwater. The integrated plug design ensures secure fitment and easy replacement during maintenance.
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$ 104.63
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1-2 weeks delivery time Zinc fin anode for Yamaha 50–90 HP outboards, OEM ref. 688-45371-02. With a 90 mm diameter, this trim anode installs under the anti-ventilation plate, providing protection against galvanic corrosion and reducing propeller torque. Made of high-purity zinc, it ensures optimal performance in saltwater environments.
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$ 36.42
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1-2 weeks delivery time Aluminium fin anode for Yamaha 50–90 HP outboards, OEM reference 688-45371-02. With a 90 mm diameter, this anode mounts under the anti-ventilation plate and provides dual functionality: corrosion protection and propeller torque compensation. Aluminium is optimal for saltwater and brackish environments, offering excellent durability, low mass, and eco-friendliness compared to zinc.
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$ 28.23
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1-2 weeks delivery time Osculati 43.260.01 – Yamaha 688-45251-01 is a zinc ring anode with dimensions Ø 24 × 15 mm, specifically designed to fit Yamaha outboard engines for shaft protection. Manufactured to match OEM specifications, this anode prevents galvanic corrosion by acting as a sacrificial element in saltwater environments. It ensures reliable protection of propeller shafts and related components, with precise machining for easy installation.
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$ 17.97
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1-2 weeks delivery time Osculati 43.260.31 – Yamaha 688-45251-01 is a lightweight aluminium ring anode with dimensions Ø 24 × 15 mm, designed for Yamaha outboard motors. It replaces OEM reference 688-45251-01 and provides sacrificial protection for propeller shafts and lower unit components. Ideal for saltwater and brackish conditions, aluminium alloy ensures superior efficiency, longer service life, and reduced environmental impact compared to zinc.
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$ 15.03
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1-2 weeks delivery time The Osculati 43.270.00 zinc fin anode is a rightward-bending trim tab anode for Yamaha outboards from 100 to 220 HP, directly replacing OEM part number 6J9-45371-01. Featuring a 100 mm diameter, it serves dual functions as a steering trim tab and sacrificial anode. Designed for saltwater environments, this zinc alloy component provides reliable corrosion protection and helps compensate for engine torque and propeller walk.
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$ 47.04
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1-2 weeks delivery time Osculati 43.270.01 is an aluminium rightward bend fin anode designed to replace Yamaha OEM part 6J9-45371-01. With a 100 mm diameter and dual functionality as both a trim tab and sacrificial anode, it is suitable for Yamaha outboards from 100 to 220 HP. Its aluminium construction ensures optimal protection and hydrodynamic balance in saltwater and brackish water environments, while reducing weight and environmental impact compared to zinc.
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$ 33.89
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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.