{"product_id":"sierra-18-6046-zinc-rudder-anode-2-13-16-diameter-saltwater-hull-and-rudder-anode","title":"Sierra 18-6046 Marine Rudder Anode - Zinc, 2-13\/16 Inch Diameter, Saltwater Use","description":"\u003cp\u003eThe Sierra 18-6046 Marine Rudder Anode is a zinc sacrificial anode designed to protect a boat's rudder and underwater metal components from galvanic corrosion. Made of zinc, this anode is intended for saltwater applications only, where zinc provides the correct level of galvanic protection for submerged hardware. The anode measures 2 13\/16 inch (71 mm) across the A-Diameter and 1\/2 inch (13 mm) at Dimension B, sizing it for direct fit-and-replace service on compatible rudder hardware. Each package includes one rudder anode.\u003c\/p\u003e\u003cp\u003eAs a sacrificial anode, the 18-6046 corrodes preferentially in place of the boat's rudder and other metal fittings, extending the service life of the protected components. Regular inspection and replacement of the anode as it wears down helps maintain continuous corrosion protection. Sierra states that this part meets or exceeds 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 18-6046\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 Saltwater use only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA-Diameter:\u003c\/strong\u003e 2 13\/16 inch (71 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimension B:\u003c\/strong\u003e 1\/2 inch (13 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.07 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Brushed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1 rudder anode per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999564177\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits applications requiring a rudder anode with a 2 13\/16 inch A-Diameter and 1\/2 inch Dimension B; consult your rudder hardware dimensions to confirm compatibility.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo specific OEM cross-reference numbers are listed for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-6046 rudder anode made of?\u003c\/strong\u003e The Sierra 18-6046 Marine Rudder Anode is made of zinc, which is the standard sacrificial anode material for saltwater use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-6046 rudder anode for freshwater or saltwater boats?\u003c\/strong\u003e Zinc anodes like the Sierra 18-6046 are intended for saltwater applications only; freshwater boats require a different anode material to provide proper galvanic protection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the Sierra 18-6046 rudder anode?\u003c\/strong\u003e It measures 2 13\/16 inch (71 mm) at the A-Diameter and 1\/2 inch (13 mm) at Dimension B.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-6046 rudder anode weigh?\u003c\/strong\u003e The Sierra 18-6046 Marine Rudder Anode weighs 1.07 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many anodes come in a package?\u003c\/strong\u003e One rudder anode is included per package of part number 18-6046.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know when to replace this rudder anode?\u003c\/strong\u003e A sacrificial anode such as the 18-6046 should be replaced once it has corroded down to roughly half its original size, since it is protecting the rudder and other metal components by corroding in their place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-6046 meet OEM specifications?\u003c\/strong\u003e Sierra states that the 18-6046 rudder anode meets or exceeds the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is my rudder anode made of zinc instead of another metal?\u003c\/strong\u003e Zinc is used on the 18-6046 because it is the correct anode material for saltwater environments, providing effective galvanic corrosion protection in that setting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does Dimension B refer to on the 18-6046 anode?\u003c\/strong\u003e Dimension B is a secondary measurement of 1\/2 inch (13 mm) on the Sierra 18-6046 rudder anode, used along with the A-Diameter to confirm fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this anode be used on components other than a rudder?\u003c\/strong\u003e The Sierra 18-6046 is designated as a rudder anode sized to a 2 13\/16 inch A-Diameter and 1\/2 inch Dimension B; check your specific hardware dimensions before using it elsewhere.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-6046 anode have?\u003c\/strong\u003e The Sierra 18-6046 rudder anode has a brushed finish.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988349497563,"sku":"SIE-18-6046","price":15.02,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-6046__59145.1737882706.500.750.jpg?v=1785188681","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-6046-zinc-rudder-anode-2-13-16-diameter-saltwater-hull-and-rudder-anode","provider":"Good Vibes Marina","version":"1.0","type":"link"}