{"product_id":"mercury-31640t4-outboard-aluminum-anode-trim-tab-fits-most-mercury-mariner-outboards-35-hp-and-above-all-mercruiser-except-bravo","title":"Mercury – Aluminum Trim Tab Anode | Corrosion Protection \u0026 Steering Aid | Cast Aluminum | 31640T4","description":"\u003cp data-start=\"0\" data-end=\"103\"\u003e\u003cstrong data-start=\"0\" data-end=\"101\"\u003eMercury – Aluminum Trim Tab Anode | Corrosion Protection \u0026amp; Steering Aid | Cast Aluminum | 31640T4\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"105\" data-end=\"108\"\u003e\n\u003ch3 data-start=\"110\" data-end=\"128\"\u003e\u003cstrong data-start=\"114\" data-end=\"126\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"129\" data-end=\"664\"\u003eCorrosion is one of an engine’s biggest enemies, and the \u003cstrong data-start=\"186\" data-end=\"236\"\u003eMercury Marine 31640T4 Aluminum Trim Tab Anode\u003c\/strong\u003e is built to stop it in its tracks. Designed for \u003cstrong data-start=\"285\" data-end=\"327\"\u003eMercury and Mariner 30–200HP outboards\u003c\/strong\u003e and \u003cstrong data-start=\"332\" data-end=\"373\"\u003eMerCruiser sterndrives (except Bravo)\u003c\/strong\u003e, this OEM anode protects your lower unit from galvanic corrosion while also providing a small hydrodynamic trim force to help balance steering. Made from \u003cstrong data-start=\"528\" data-end=\"558\"\u003ehigh-quality cast aluminum\u003c\/strong\u003e, it works in both fresh and saltwater, lasts longer than zinc, and installs easily with standard tools.\u003c\/p\u003e\n\u003chr data-start=\"666\" data-end=\"669\"\u003e\n\u003ch3 data-start=\"671\" data-end=\"693\"\u003e\u003cstrong data-start=\"675\" data-end=\"691\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"696\" data-end=\"798\"\u003e\n\u003cstrong data-start=\"696\" data-end=\"708\"\u003ePurpose:\u003c\/strong\u003e Protects your gearcase and drive housing from galvanic corrosion while aiding steering.\u003c\/li\u003e\n\u003cli data-start=\"801\" data-end=\"913\"\u003e\n\u003cstrong data-start=\"801\" data-end=\"814\"\u003eMaterial:\u003c\/strong\u003e Constructed from \u003cstrong data-start=\"832\" data-end=\"849\"\u003ecast aluminum\u003c\/strong\u003e alloy that meets \u003cstrong data-start=\"867\" data-end=\"886\"\u003eMIL-A-24779(SH)\u003c\/strong\u003e military specifications.\u003c\/li\u003e\n\u003cli data-start=\"916\" data-end=\"1021\"\u003e\n\u003cstrong data-start=\"916\" data-end=\"927\"\u003eDesign:\u003c\/strong\u003e Doubles as a \u003cstrong data-start=\"941\" data-end=\"953\"\u003etrim tab\u003c\/strong\u003e, reducing steering torque and helping maintain straight tracking.\u003c\/li\u003e\n\u003cli data-start=\"1024\" data-end=\"1144\"\u003e\n\u003cstrong data-start=\"1024\" data-end=\"1040\"\u003ePerformance:\u003c\/strong\u003e Works efficiently in \u003cstrong data-start=\"1062\" data-end=\"1096\"\u003efresh, salt, or brackish water\u003c\/strong\u003e, offering longer protection than zinc anodes.\u003c\/li\u003e\n\u003cli data-start=\"1147\" data-end=\"1253\"\u003e\n\u003cstrong data-start=\"1147\" data-end=\"1172\"\u003eEase of Installation:\u003c\/strong\u003e Quick replacement using common tools; check prop clearance after installation.\u003c\/li\u003e\n\u003cli data-start=\"1256\" data-end=\"1377\"\u003e\n\u003cstrong data-start=\"1256\" data-end=\"1274\"\u003eCompatibility:\u003c\/strong\u003e Fits \u003cstrong data-start=\"1280\" data-end=\"1318\"\u003eMercury\/Mariner 30–200HP outboards\u003c\/strong\u003e and \u003cstrong data-start=\"1323\" data-end=\"1374\"\u003eMerCruiser sterndrives (excluding Bravo models)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1379\" data-end=\"1382\"\u003e\n\u003ch3 data-start=\"1384\" data-end=\"1421\"\u003e\u003cstrong data-start=\"1388\" data-end=\"1419\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1424\" data-end=\"1491\"\u003eDesigned for \u003cstrong data-start=\"1437\" data-end=\"1488\"\u003eMercury and Mariner 30–200 horsepower outboards\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1494\" data-end=\"1552\"\u003eFits \u003cstrong data-start=\"1499\" data-end=\"1529\"\u003eall MerCruiser sterndrives\u003c\/strong\u003e except Bravo drives.\u003c\/li\u003e\n\u003cli data-start=\"1555\" data-end=\"1633\"\u003eCommonly used on \u003cstrong data-start=\"1572\" data-end=\"1630\"\u003epontoons, fishing boats, cruisers, and sport runabouts\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1636\" data-end=\"1695\"\u003ePerforms in both \u003cstrong data-start=\"1653\" data-end=\"1681\"\u003efreshwater and saltwater\u003c\/strong\u003e conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1697\" data-end=\"1700\"\u003e\n\u003ch3 data-start=\"1702\" data-end=\"1744\"\u003e\u003cstrong data-start=\"1706\" data-end=\"1742\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1745\" data-end=\"2133\"\u003eThe \u003cstrong data-start=\"1749\" data-end=\"1766\"\u003e31640T4 anode\u003c\/strong\u003e protects your engine by acting as a sacrificial metal, attracting corrosion away from your drive components. Its hydrodynamic design also helps stabilize steering, keeping your boat tracking straight and smooth. Once installed, it begins working immediately to shield your gearcase, exhaust housing, and mounting hardware from costly damage caused by electrolysis.\u003c\/p\u003e\n\u003cp data-start=\"2135\" data-end=\"2355\"\u003eThis aluminum alloy anode lasts up to 50% longer than zinc, making it the smart choice for mixed or saltwater environments. It’s easy to replace — just check it a few times a season and swap it out when heavily pitted.\u003c\/p\u003e\n\u003chr data-start=\"2357\" data-end=\"2360\"\u003e\n\u003ch3 data-start=\"2362\" data-end=\"2383\"\u003e\u003cstrong data-start=\"2366\" data-end=\"2381\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2384\" data-end=\"2652\"\u003eAftermarket anodes often use alloys that don’t meet marine-grade standards, meaning they wear unevenly or fail to provide full protection. The \u003cstrong data-start=\"2527\" data-end=\"2546\"\u003eMercury 31640T4\u003c\/strong\u003e is a \u003cstrong data-start=\"2552\" data-end=\"2583\"\u003egenuine Mercury Marine part\u003c\/strong\u003e, tested and proven for durability, performance, and precision fit.\u003c\/p\u003e\n\u003cp data-start=\"2654\" data-end=\"2928\"\u003eMercury’s OEM anodes meet the same specifications used in new-engine production, ensuring the correct alloy composition and corrosion rate. When you install an OEM anode, you’re protecting your entire drive system with the exact material your engine was engineered to use.\u003c\/p\u003e\n\u003chr data-start=\"2930\" data-end=\"2933\"\u003e\n\u003ch3 data-start=\"2935\" data-end=\"2948\"\u003e\u003cstrong data-start=\"2939\" data-end=\"2946\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2950\" data-end=\"3103\"\u003e\u003cstrong data-start=\"2950\" data-end=\"2992\"\u003eQ1: Which engines does this anode fit?\u003c\/strong\u003e\u003cbr data-start=\"2992\" data-end=\"2995\"\u003eIt fits \u003cstrong data-start=\"3003\" data-end=\"3045\"\u003eMercury and Mariner 30–200HP outboards\u003c\/strong\u003e and \u003cstrong data-start=\"3050\" data-end=\"3076\"\u003eMerCruiser sterndrives\u003c\/strong\u003e, excluding Bravo models.\u003c\/p\u003e\n\u003cp data-start=\"3105\" data-end=\"3238\"\u003e\u003cstrong data-start=\"3105\" data-end=\"3133\"\u003eQ2: What’s it made from?\u003c\/strong\u003e\u003cbr data-start=\"3133\" data-end=\"3136\"\u003eIt’s made of \u003cstrong data-start=\"3149\" data-end=\"3166\"\u003ecast aluminum\u003c\/strong\u003e alloy meeting \u003cstrong data-start=\"3181\" data-end=\"3200\"\u003eMIL-A-24779(SH)\u003c\/strong\u003e standards for corrosion resistance.\u003c\/p\u003e\n\u003cp data-start=\"3240\" data-end=\"3364\"\u003e\u003cstrong data-start=\"3240\" data-end=\"3291\"\u003eQ3: Can it be used in both fresh and saltwater?\u003c\/strong\u003e\u003cbr data-start=\"3291\" data-end=\"3294\"\u003eYes — aluminum anodes perform better than zinc in both environments.\u003c\/p\u003e\n\u003cp data-start=\"3366\" data-end=\"3492\"\u003e\u003cstrong data-start=\"3366\" data-end=\"3404\"\u003eQ4: How often should I replace it?\u003c\/strong\u003e\u003cbr data-start=\"3404\" data-end=\"3407\"\u003eInspect it regularly and replace it when it’s about halfway worn or heavily pitted.\u003c\/p\u003e\n\u003cp data-start=\"3494\" data-end=\"3648\"\u003e\u003cstrong data-start=\"3494\" data-end=\"3534\"\u003eQ5: Why choose OEM over aftermarket?\u003c\/strong\u003e\u003cbr data-start=\"3534\" data-end=\"3537\"\u003eMercury OEM anodes guarantee correct alloy composition and fit, offering the best protection for your engine.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46933627240739,"sku":"97-31640T4","price":17.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/31640t4_main.jpg?v=1760631182","url":"https:\/\/partsvu.com\/en-au\/products\/mercury-31640t4-outboard-aluminum-anode-trim-tab-fits-most-mercury-mariner-outboards-35-hp-and-above-all-mercruiser-except-bravo","provider":"PartsVu","version":"1.0","type":"link"}