{"product_id":"zinc-trim-tab-anode-fits-yamaha-150hp-175hp-200hp-225hp-counter-rotation-replaces-6k1-45371-02-18-6121","title":"Zinc Trim Tab Anode – Fits Yamaha 150HP 175HP 200HP 225HP Counter Rotation (Replaces 6K1-45371-02, 18-6121)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eZinc Trim Tab Anode\u003c\/strong\u003e is designed specifically for Yamaha outboard engines rated at 150 HP, 175 HP, 200 HP, and 225 HP with counter rotation configuration, covering model years from 1986 and up, including 4-stroke engines. This corrosion-protection component safeguards your lower unit by providing sacrificial zinc protection in saltwater and brackish environments.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket anode directly replaces OEM part numbers 6K1-45371-02-00, 6K1-45371-01-00, and Sierra 18-6121, ensuring seamless compatibility with your existing mounting configuration.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSacrificial zinc material designed for saltwater use\u003c\/li\u003e\n  \u003cli\u003eDirect bolt-on installation to trim tab location\u003c\/li\u003e\n  \u003cli\u003eCompatible with both 2-stroke and 4-stroke Yamaha outboards in specified HP range\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6K1-45371-02-00\u003c\/td\u003e\n        \u003ctd\u003ePrimary OEM reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6K1-45371-01-00\u003c\/td\u003e\n        \u003ctd\u003eSuperseded part number\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6K1-45371-02\u003c\/td\u003e\n        \u003ctd\u003eCommon short form\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-6121\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e150 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1986–Up\u003c\/td\u003e\n        \u003ctd\u003eCounter rotation only\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e175 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1986–Up\u003c\/td\u003e\n        \u003ctd\u003eCounter rotation only\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e200 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1986–Up\u003c\/td\u003e\n        \u003ctd\u003eCounter rotation only\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e225 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1986–Up\u003c\/td\u003e\n        \u003ctd\u003eCounter rotation only\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\n\u003cdl\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n  \u003cdd\u003eZinc alloy\u003c\/dd\u003e\n  \n  \u003cdt\u003eConfiguration\u003c\/dt\u003e\n  \u003cdd\u003eTrim tab anode\u003c\/dd\u003e\n  \n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSaltwater \u0026amp; brackish water environments\u003c\/dd\u003e\n  \n  \u003cdt\u003eMounting Type\u003c\/dt\u003e\n  \u003cdd\u003eBolt-on to trim tab position\u003c\/dd\u003e\n  \n  \u003cdt\u003eCompatibility\u003c\/dt\u003e\n  \u003cdd\u003eCounter rotation engines only\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Zinc Trim Tab Anode\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eRemove the old anode from the trim tab location using appropriate tools. Inspect mounting surface for corrosion or damage.\u003c\/li\u003e\n  \u003cli\u003eClean the mounting surface thoroughly to ensure bare metal contact for proper electrical conductivity.\u003c\/li\u003e\n  \u003cli\u003ePosition the new zinc anode onto the trim tab, aligning all mounting holes.\u003c\/li\u003e\n  \u003cli\u003eInstall fasteners hand-tight first, then torque to manufacturer specifications in a cross-pattern.\u003c\/li\u003e\n  \u003cli\u003eApply a thin layer of anti-seize compound to fastener threads if operating in saltwater conditions.\u003c\/li\u003e\n  \u003cli\u003eInspect anode monthly and replace when eroded to 50% of original size or less.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this fits my counter rotation Yamaha?\u003c\/summary\u003e\n  \u003cp\u003eVerify your engine is rated at 150, 175, 200, or 225 HP and manufactured from 1986 onward with counter rotation. Cross-check your current anode against part numbers 6K1-45371-02 or 6K1-45371-01. If your existing anode matches these numbers, this replacement will fit.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat's the difference between counter rotation and standard rotation?\u003c\/summary\u003e\n  \u003cp\u003eCounter rotation engines spin in the opposite direction and use different lower unit components, including anodes. Installing the wrong anode may result in improper fit or inadequate corrosion protection. Always verify your engine's rotation type before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should I replace this anode?\u003c\/summary\u003e\n  \u003cp\u003eInspect monthly in saltwater use. Replace when the anode has eroded to 50% or less of its original size. Heavily used engines or those in warm saltwater may require replacement every 6–12 months.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eCan I use this anode in freshwater?\u003c\/summary\u003e\n  \u003cp\u003eZinc anodes are formulated for saltwater and brackish environments. In freshwater, zinc can become passive and less effective. For freshwater applications, magnesium anodes are recommended. Consult your engine manual for guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhy is my anode not corroding?\u003c\/summary\u003e\n  \u003cp\u003eIf the anode shows little erosion, check for paint or oxidation blocking metal-to-metal contact at the mounting surface. Ensure fasteners are tight and the anode has direct electrical continuity with the lower unit. Anodes also corrode slower in freshwater.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWill this work on both 2-stroke and 4-stroke Yamaha engines?\u003c\/summary\u003e\n  \u003cp\u003eYes, this anode fits both 2-stroke and 4-stroke Yamaha outboards in the 150–225 HP counter rotation range, provided they use the same lower unit design covered by the OEM part numbers listed.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":51025817403707,"sku":"24ZA492","price":28.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/A10199aff22324781b600b7bf18ae4ba0R.webp?v=1773220797","url":"https:\/\/seasierra.com\/products\/zinc-trim-tab-anode-fits-yamaha-150hp-175hp-200hp-225hp-counter-rotation-replaces-6k1-45371-02-18-6121","provider":"SeaSierra","version":"1.0","type":"link"}