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Martyr Anodes CM865182CM Mercruiser Bravo III Prop Nut Magnesium Anode

Manufacturer

Martyr Anodes

<h3>About Martyr Anodes</h3><p>When it comes to defending a vessel against galvanic corrosion, few names carry the authority of <strong>Martyr Anodes</strong>. A flagship brand within the <strong>CMP Group</strong>, Martyr has its roots in foundry operations that date back to the early 1900s in Vancouver, BC, growing from a local manufacturer into a globally recognized leader in marine cathodic protection. Today, the brand supplies boaters, commercial operators, and marine professionals worldwide with sacrificial anodes engineered to guard hulls, propellers, rudders, shafts, engines, and other submerged components from the relentless effects of corrosion.</p><h3>Three Alloys, Every Water Type</h3><p>What sets Martyr apart from competing anode manufacturers is its position as the only brand to offer all three protective alloys — zinc, aluminum, and magnesium — under a single product line. This matters because the correct alloy depends entirely on the water environment a vessel operates in. Zinc anodes are the classic choice for aggressive saltwater conditions, while aluminum anodes are preferred for saltwater and brackish environments, offering superior corrosion resistance with a reduced environmental footprint. Magnesium anodes are the go-to solution for freshwater use, delivering effective sacrificial protection without degrading too quickly. Whatever the operating environment, Martyr has an engineered solution to match.</p><h3>Military-Grade Manufacturing Standards</h3><p>Martyr does not cut corners on metallurgy. Every anode is pressure die-cast and manufactured to meet or exceed <strong>U.S. Military alloy specifications</strong>, using only high-purity metals. Each alloy batch is lab-tested with full certification and traceability available upon request. This rigorous quality management — operating under an ISO 9001 framework — ensures that each anode delivers consistent, long-lasting galvanic performance across a wide range of marine environments, from recreational pleasure craft to commercial vessels and naval applications.</p><h3>Anode Kits for Simplified Protection</h3><p>For boaters who want a complete, hassle-free maintenance solution, Martyr&rsquo;s <a href="/7452-martyr-anodes-anode-kits-200102">Anode Kits</a> offer pre-packaged sets engineered for specific engine models and boat types. Compatible with major marine engine brands including Yamaha, Mercury, Volvo, and MerCruiser, these kits take the guesswork out of corrosion protection and ensure every critical system receives optimal coverage in a single purchase.</p><h3>Sustainability at the Core</h3><p>Martyr and the CMP Group have made environmental stewardship a cornerstone of their mission. Traditional zinc anodes can contain cadmium, a metal that poses risks to aquatic ecosystems. Martyr actively advocates for the adoption of aluminum and magnesium alternatives that deliver equal or superior protection while minimizing harm to marine environments — embodying the brand&rsquo;s philosophy of &ldquo;Protect your boat, protect our waters.&rdquo; With over 1,000 anode types available and a catalog that fits virtually every major marine engine and boat model, Martyr remains one of the most comprehensive and trusted sources for marine corrosion protection in the world.</p>

Part Number

CM865182CM
06/01/2036 11:09 AM
Sale Price

$13.88

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Martyr Anodes CM865182CM is a magnesium prop nut anode designed specifically for MerCruiser Bravo III outdrives from 2004 to present. This enhanced protection anode replaces the standard prop nut to provide superior corrosion protection for your propeller shaft and lower unit components in freshwater environments.

Key Features:

  • Precision-engineered magnesium alloy construction optimized for freshwater use
  • Direct replacement for OEM MerCruiser part number 865182
  • Fits MerCruiser Bravo III stern drives (2004-present models)
  • Protects expensive drive components from galvanic corrosion
  • Easy installation - replaces existing prop nut
  • Premium corrosion protection without sacrificing propeller performance

Important Installation Note: Always verify proper propeller clearance after installing any new anode to ensure safe operation.

Anode Material Selection Guide: Use magnesium anodes for freshwater applications, aluminum anodes for saltwater and brackish water, and zinc anodes for saltwater environments. This magnesium anode is specifically formulated for freshwater use where magnesium provides the optimal galvanic protection.

Great price. Can tell more after delivery.

Easy check out. My part arrived in a few days Thanks guys

This site was very quick and easy to use.

Very fast and easy! I have not tried my part that was ordered, But I was satisfied with the delivery time and packaging.

good

fast and easy and guranteed lowest price

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