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Quicksilver 31640T6 Magnesium Trim Tab Anode for Mercury Mariner Outboards MerCruiser Sterndrives

Manufacturer

Quicksilver

<h3>Quicksilver: The Marine Enthusiast&apos;s Trusted OEM Brand</h3><p>For boaters who refuse to compromise on quality, <strong>Quicksilver</strong> has been the benchmark for marine parts, accessories, and engine care products since 1950. Based in Fond du Lac, Wisconsin, Quicksilver operates as the parts and accessories brand of Mercury Marine — and that heritage is central to everything it makes. As the only marine aftermarket brand manufactured and recommended by an original-equipment manufacturer, Quicksilver brings factory-level engineering directly to boat owners, professional technicians, and weekend warriors alike.</p><p>What sets Quicksilver apart from generic aftermarket suppliers is its direct lineage to the engineers who designed the engines in the first place. Every component is engineered, tested, and manufactured with the same exacting standards as the original equipment it replaces. The result is a product line that fits right the first time and delivers the reliability boaters depend on — whether they&apos;re navigating calm inland lakes or pushing through demanding saltwater conditions.</p><p>Quicksilver&apos;s catalog spans more than 40,000 parts across 12 product lines, covering outboard and sterndrive engines from Mercury, Mariner, Yamaha, Honda, Evinrude, Johnson, Suzuki, and more. Among the most critical components in that lineup are Quicksilver Fuel Pumps, which are built to deliver factory fit and consistent fuel delivery across a wide range of outboard applications. Reliable fuel delivery is the foundation of engine performance, and Quicksilver&apos;s fuel system components are engineered to handle the demanding conditions of marine use — including compatibility with current fuel formulations.</p><p>Beyond fuel systems, Quicksilver is a go-to source for Propeller Parts &amp; Accessories that help boaters maintain and optimize their propulsion systems. From hub kits that protect both prop and gearcase to installation hardware and prop tools, these components are designed to the same tolerances as the drives they support. Proper propeller maintenance is one of the most impactful things a boat owner can do for performance, efficiency, and engine longevity — and Quicksilver makes that job straightforward.</p><p>The brand&apos;s commitment extends across lubricants, impellers, thermostats, anodes, fuel filters, oil filters, maintenance kits, and complete service packages — all engineered for the marine environment and tested to meet or exceed the standards of major engine manufacturers. Whether you&apos;re performing routine seasonal maintenance or tackling a more involved repair, Quicksilver provides the parts that restore your engine to peak operating condition.</p><ul style="list-style:disc"><li>OEM-backed engineering from Mercury Marine</li><li>Compatible with Mercury, Yamaha, Honda, Evinrude, Johnson, Suzuki, and Mariner engines</li><li>Over 40,000 parts spanning 12 product lines</li><li>Formulated and tested for freshwater and saltwater environments</li><li>Trusted by DIY boaters and professional marine technicians since 1950</li></ul><p>When reliability on the water is non-negotiable, Quicksilver delivers the peace of mind that only a true OEM-backed brand can provide.</p>

Part Number

31640T 6
09/12/2036 7:03 AM
Sale Price

$25.94

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Quicksilver 31640T6 is a magnesium trim tab anode engineered specifically for freshwater use on Mercury and Mariner outboards (35 hp and above) and all MerCruiser sterndrives except the Bravo series. Produced to meet Mercury Marine original equipment manufacturer specifications, this anode delivers reliable galvanic corrosion protection to keep your engine and drivetrain components in peak condition season after season.

Magnesium is the preferred anode material for freshwater environments due to its higher electrochemical activity, making it more effective than aluminum or zinc in low-conductivity water. As a sacrificial anode, the 31640T6 attracts corrosion away from critical metal components, acting as the first line of defense against galvanic degradation. As an added benefit, this trim tab anode also helps reduce steering torque for improved handling.

Key Features:

  • Freshwater use only — magnesium formulation optimized for low-conductivity freshwater environments; do not use in saltwater
  • Cast magnesium construction meets or exceeds Mil-Spec A-21412(SH) military specification standards
  • Produced to Mercury Marine OEM specifications for a precise, factory-correct fit
  • Functions as a trim tab anode to combat galvanic corrosion and help reduce steering torque
  • Fits Mercury and Mariner outboards 35 hp and above, plus all MerCruiser sterndrives except Bravo series
  • Easy to install using existing hardware and common hand tools
  • Check for proper propeller clearance at time of installation

Inspect this anode periodically and replace when approximately 50% consumed for continuous corrosion protection. Quicksilver genuine OEM parts are backed by Mercury Marine's reputation for quality and tested to withstand the most demanding marine environments.

Peachy so far. Price was right, received quickly and matched the OEM measurements. Satisfied customer.

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