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Martyr Anodes CM31640Z Aluminum Anode for Mercury MerCruiser Bravo Outdrives

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

CM31640Z
06/03/2036 8:36 AM
Sale Price

$10.03

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Martyr Anodes CM31640Z is a high-quality aluminum sacrificial anode designed specifically for Mercury MerCruiser Bravo stern drives. This trim tab anode provides critical corrosion protection for your outdrive by sacrificing itself to prevent galvanic corrosion damage to more expensive metal components.

Key Features:

  • Premium aluminum alloy construction for maximum protection in saltwater and brackish water environments
  • Direct replacement for Mercury part number 31640A1
  • Designed to mount on the trim tab area of Bravo outdrives
  • Provides reliable galvanic corrosion protection to extend the life of your outdrive
  • Manufactured to strict military specifications for consistent performance

Installation Note: Always verify proper propeller clearance after installing trim tab anodes to ensure safe operation and prevent potential contact issues.

Martyr Anodes are engineered to meet or exceed OEM specifications, providing boat owners with dependable corrosion protection at a competitive value. Regular replacement of sacrificial anodes is essential preventive maintenance for any sterndrive or inboard/outboard system operating in saltwater or brackish water conditions.

Products specifications

Description

Standard Trim Tab, Fits GEN. II

Material

Zinc

Gud

Product was well packaged. The only downside to this product is that it does not come with a new manifold gasket or new mounting hardware for the headers.

Had the product I wanted in stock at best price on or off net Free ground shipping too! Quickly Responsive website

No problems. Delivered as ordered.

Excellent AAAA++++++

Yay

Quick online shopping.

great service

Very easy and simple check out

Good availability and good price.

can,t believe its this cheap,probably a miss print

I just installed the Husky WeatherBeater floor liners and they are EXACTLY what I was hoping for. Not only was the price almost half of what I found from Walmart, but I received it about a week earlier than promised. I will be back here for all of my auto parts from now on. Thanks so much!!

User friendly site and found what I needed quickly.

Awesome and cheap

great

first order fast shipping and great fit

Easy to order with the Amazon connectivity

Quick, Friendly & Easy site to use. Would use them again.

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