{"product_id":"sierra-18-6011-zinc-anode-for-honda-bf75-bf90-mercury-mariner-outboards-replaces-41107-zw1-003za-31640a1","title":"Sierra 18-6011 Zinc Anode for Mercury\/Mariner Outboards 35 HP and Above and MerCruiser Except Bravo","description":"\u003cp\u003eThe Sierra 18-6011 is a zinc sacrificial anode designed to protect Mercury, Mariner, and MerCruiser drive components from galvanic corrosion in the marine environment. Made of zinc, the anode is intended to corrode in place of surrounding metal parts, giving underwater hardware a longer service life. It carries a compact, machined design measuring 0.39 x 0.39 x 0.39 inches and weighs 1.11 pounds.\u003c\/p\u003e\u003cp\u003eThis anode fits most Mercury and Mariner outboards rated 35 HP and above, as well as all MerCruiser drives except Bravo. It cross-references directly to Mercury Marine part number 31640A1, Honda part number 41107-ZW1-003ZA, and OEM number 31640Q4, making it a straightforward replacement for the original anode on covered engines and drives. Like other Sierra parts, it is built to meet or exceed the specifications of the OEM part it replaces and is covered under Sierra's customer satisfaction warranty.\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 18-6011\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Zinc Anode\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Zinc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.11 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Most Mercury\/Mariner outboards 35 HP and above and all MerCruiser except Bravo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 31640Q4, Honda 41107-ZW1-003ZA, Mercury Marine 31640A1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999320209\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMost Mercury\/Mariner outboards, 35 HP and above\u003c\/li\u003e\n\u003cli\u003eAll MerCruiser drives except Bravo\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e31640Q4\u003c\/li\u003e\n\u003cli\u003eHonda 41107-ZW1-003ZA\u003c\/li\u003e\n\u003cli\u003eMercury Marine 31640A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines and drives does the Sierra 18-6011 anode fit?\u003c\/strong\u003e The Sierra 18-6011 fits most Mercury and Mariner outboards rated 35 HP and above, along with all MerCruiser drives except Bravo.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-6011 anode a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-manufactured replacement anode, not an OEM Mercury or Honda part, but it is built to meet or exceed the specifications of the OEM anode it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-6011 cross-reference?\u003c\/strong\u003e It cross-references Mercury Marine part number 31640A1, Honda part number 41107-ZW1-003ZA, and OEM number 31640Q4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-6011 anode made from?\u003c\/strong\u003e The Sierra 18-6011 is made of zinc, which is the standard sacrificial metal used to protect submerged marine hardware from galvanic corrosion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow big is the Sierra 18-6011 anode?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches and weighs 1.11 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this anode work on a MerCruiser Bravo drive?\u003c\/strong\u003e No, the Sierra 18-6011 is not for Bravo drives; it fits all MerCruiser drives except Bravo, so a Bravo-specific anode should be used instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-6011 fit smaller outboards under 35 HP?\u003c\/strong\u003e No, this anode is designated for Mercury\/Mariner outboards rated 35 HP and above; it is not intended for lower-horsepower models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know when this anode needs to be replaced?\u003c\/strong\u003e A zinc anode like the 18-6011 should be replaced once it has visibly corroded down to roughly half its original size, since its job is to sacrifice itself in place of surrounding metal parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-6011 anode something I can do myself?\u003c\/strong\u003e Replacing a Sierra 18-6011 anode is a straightforward hardware swap in the location of the original anode, typically requiring only basic hand tools.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-6011 come with any warranty coverage?\u003c\/strong\u003e Yes, the 18-6011 is covered under Sierra's customer satisfaction warranty, as are all Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-6011 anode have?\u003c\/strong\u003e The Sierra 18-6011 has a machined exterior finish.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988348285147,"sku":"SIE-18-6011","price":17.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-6011_lg__37972.1558128537.500.750.jpg?v=1785188344","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-6011-zinc-anode-for-honda-bf75-bf90-mercury-mariner-outboards-replaces-41107-zw1-003za-31640a1","provider":"Good Vibes Marina","version":"1.0","type":"link"}