{"product_id":"sierra-18-6015-9-marine-anode-pack-of-2-replaces-mercury-55989a3-fits-mercruiser-bravo-i-ii-iii-sterndrive-1988-1995","title":"Sierra 18-6015-9 Anode for Mercury MerCruiser Alpha One SS (1982-89), Replaces 55989A3, Pack of 2","description":"\u003cp\u003eThe Sierra 18-6015-9 Anode is a sacrificial anode built for Mercury MerCruiser Alpha One SS drives (1982-89). Sold as a pack of 2, it protects the outdrive and surrounding metal components from galvanic corrosion caused by electrolysis in salt, brackish, or fresh water. Sacrificial anodes work by corroding in place of more expensive drive components, so they need to be inspected regularly and replaced once significantly worn down, well before they are fully consumed, to keep the protection intact.\u003c\/p\u003e\u003cp\u003eThis anode is a direct fit for the Alpha One SS drive and cross-references to the Mercury Marine 55989 series part numbers, making it a straightforward swap for boat owners maintaining their own MerCruiser outdrive. Because it ships two to a package, one purchase covers a full anode replacement on a single drive or gives you a spare for the next service interval.\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 18-6015-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Anode\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.48 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercury MerCruiser Alpha One SS (1982-89)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury MerCruiser Alpha One SS (1982-89)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e55989A3\u003c\/li\u003e\n\u003cli\u003e55989Q9\u003c\/li\u003e\n\u003cli\u003e55989T9\u003c\/li\u003e\n\u003cli\u003e55989A9\u003c\/li\u003e\n\u003cli\u003e55989A4\u003c\/li\u003e\n\u003cli\u003e55989\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat drive does the Sierra 18-6015-9 anode fit?\u003c\/strong\u003e The Sierra 18-6015-9 anode is built for Mercury MerCruiser Alpha One SS drives (1982-89).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many anodes come in the package?\u003c\/strong\u003e The Sierra 18-6015-9 ships as a pack of 2 anodes, enough for a full replacement service on one Alpha One SS drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-6015-9 replace?\u003c\/strong\u003e It replaces Mercury Marine part numbers 55989A3, 55989Q9, 55989T9, 55989A9, 55989A4, and 55989.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-6015-9 anode weigh?\u003c\/strong\u003e The pack of 2 anodes weighs 0.48 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this an OEM or aftermarket anode?\u003c\/strong\u003e The Sierra 18-6015-9 is an aftermarket anode manufactured to match the fit and function of the Mercury Marine 55989-series OEM anodes it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this anode fit a Bravo drive?\u003c\/strong\u003e No, the 18-6015-9 is designated for the Alpha One SS drive (1982-89); Bravo drives use a different Sierra anode part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the 18-6015-9 anode be replaced?\u003c\/strong\u003e Sacrificial anodes like the 18-6015-9 should be inspected regularly and replaced once noticeably corroded, before they are fully consumed, so the Alpha One SS drive stays protected from galvanic corrosion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does an Alpha One SS drive need an anode like the 18-6015-9?\u003c\/strong\u003e The anode sacrifices itself to galvanic corrosion in place of the drive's metal components, which is essential protection in salt, brackish, or fresh water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I order the 18-6015-9 as a single unit instead of a pack of 2?\u003c\/strong\u003e The 18-6015-9 is sold as a pack of 2; it is not offered as a single-unit package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-6015-9 cross-reference to Mercury Marine 55989A9?\u003c\/strong\u003e Yes, 55989A9 is one of the OEM numbers the Sierra 18-6015-9 anode replaces.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988348645595,"sku":"SIE-18-6015-9","price":6.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/186015_1__37497.1558128937.500.750.jpg?v=1785187976","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-6015-9-marine-anode-pack-of-2-replaces-mercury-55989a3-fits-mercruiser-bravo-i-ii-iii-sterndrive-1988-1995","provider":"Good Vibes Marina","version":"1.0","type":"link"}