{"product_id":"sierra-18-6028-zinc-exhaust-housing-anode-replaces-392123-fits-v4-and-v6-outboards-1983-1990","title":"Sierra 18-6028 Zinc Anode - Replaces 392123 - For Exhaust Housing V4 \u0026 V6 (1983-90)","description":"\u003cp\u003eThe Sierra 18-6028 is a zinc sacrificial anode engineered for the exhaust housing on V4 and V6 marine engines (1983-90). As a sacrificial anode, it corrodes in place of surrounding metal components, protecting the exhaust housing from galvanic corrosion caused by electrolysis in the water. Made of zinc, the standard anode material for saltwater and brackish-water use, the 18-6028 is a direct replacement for OEM part number 392123.\u003c\/p\u003e\u003cp\u003eRoutine anode replacement is one of the simplest and most important maintenance tasks for any boat owner, since a depleted anode leaves expensive engine and drive components exposed to corrosion damage. This anode is sized specifically for exhaust housing applications on V4 and V6 engines and installs in the same location as the original equipment part it replaces.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-6028\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Zinc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Exhaust Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e V4 \u0026amp; V6 (1983-90)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces:\u003c\/strong\u003e 392123\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999563996\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 3.5 x 7 x 4.75 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eV4 \u0026amp; V6 engines (1983-90) - exhaust housing\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e392123\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-6028 anode fit?\u003c\/strong\u003e It is designed for the exhaust housing on V4 and V6 engines from 1983 through 1990.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-6028 replace?\u003c\/strong\u003e The Sierra 18-6028 replaces OEM part number 392123.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-6028 anode made from?\u003c\/strong\u003e It is made of zinc, which is the standard sacrificial anode material used to protect exhaust housings from galvanic corrosion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-6028 anode weigh?\u003c\/strong\u003e The Sierra 18-6028 weighs 2.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-6028 anode?\u003c\/strong\u003e The product measures 3.5 x 7 x 4.75 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere on the engine does this anode install?\u003c\/strong\u003e The 18-6028 mounts on the exhaust housing of applicable V4 and V6 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-6028 a genuine Sierra part?\u003c\/strong\u003e Yes, part number 18-6028 is a Sierra-branded zinc anode, not a generic aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the exhaust housing need a sacrificial anode?\u003c\/strong\u003e A zinc anode on the exhaust housing corrodes in place of the surrounding metal, protecting the housing from galvanic corrosion in the water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-6028 fit engines outside the 1983-90 V4\/V6 range?\u003c\/strong\u003e The Sierra 18-6028 is specified for V4 and V6 engines built between 1983 and 1990 exhaust housings; fitment outside that range is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know when to replace this anode?\u003c\/strong\u003e Inspect the 18-6028 anode periodically and replace it once it has visibly corroded down to protect the exhaust housing from damage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-6028?\u003c\/strong\u003e You receive one Sierra 18-6028 zinc anode for the exhaust housing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988349268187,"sku":"SIE-18-6028","price":37.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-6028_lg__96942.1558130010.500.750.jpg?v=1785189099","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-6028-zinc-exhaust-housing-anode-replaces-392123-fits-v4-and-v6-outboards-1983-1990","provider":"Good Vibes Marina","version":"1.0","type":"link"}