Sierra 118-6004 Zinc Anode

Compatible Engines

The original SIERRA zinc anode, part number 118-6004, is a vital component of your outboard motor's cathodic protection system, designed to ensure the longevity of your engine. This manufacturer is highly regarded in the market for providing high-quality replacements that meet rigorous safety and efficiency standards. Also identified by the symbol 030999320131, this anode acts as a sacrificial element, absorbing electrolytic corrosion that would otherwise damage valuable engine components such as the cylinder head, water pump, or drive shaft.

As specific engine model compatibility data is not available in the source records, verifying compatibility is essential. Compare the manufacturer's catalog number (118-6004) with the OE (original equipment) number required by your unit. Due to the structural differences between various brands, we recommend contacting our customer support directly if you have any doubts. Our experts will help confirm if this specific zinc anode is the right choice for your engine, ensuring peace of mind and avoiding unnecessary returns.

Installation and Maintenance

Replacing the anode is a task best performed regularly, ideally before each sailing season. Replace the anode when it is more than 50% consumed to protect the engine from corrosion. Installation is straightforward: unscrew the old anode, clean the threads and mounting area from deposits, then install the new one, tightening it with the appropriate torque. Remember that the zinc must remain in constant contact with water to function effectively.

• Original SIERRA quality – guarantees effective cathodic protection.
• Easy replacement – standard thread facilitates servicing.
• Corrosion resistance – extends the lifespan of key engine components.
• Precise fit – compatibility with catalog number 118-6004.