{"product_id":"sierra-18-3584-1-circulating-water-pump-bi-directional-for-crusader-inboard-engine-cooling-systems","title":"Sierra Circulating Water Pump 18-3584-1, Replaces 71683A1, for Mercruiser 215 to 255 \u0026 888, Ford Small Block V-8 Engines","description":"\u003cp\u003eThe Sierra Circulating Water Pump, part number 18-3584-1, is a direct-fit replacement circulating pump built for Mercruiser 215 to 255 and 888 applications as well as Ford small block V-8 engines. This pump handles the job of circulating coolant through the engine block to keep operating temperatures in check, a critical function for marine engines that run for extended periods under load. It is constructed from stainless steel, chosen for its resistance to corrosion in the marine environment where exposure to moisture and saltwater accelerates wear on lesser materials. Because it is designed as a replacement unit, it is engineered to install in place of the original equipment pump without modification, using the same mounting points and drive configuration as the parts it replaces. Boat owners and marine mechanics use this pump when the factory circulating pump has failed, developed a leak, or is nearing the end of its service life, and replacing it proactively is a common part of a broader cooling system overhaul. The pump carries a cross-reference to several OEM and aftermarket part numbers, making it straightforward to identify as the correct replacement when working from an old part number or a parts diagram. At 12.59 pounds, it is a solid, fully assembled unit ready for installation.\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 18-3584-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Circulating Water Pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 12.59 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282377939\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment - Mercruiser:\u003c\/strong\u003e 215 to 255 \u0026amp; 888\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment - Ford:\u003c\/strong\u003e Small block V-8 engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 71683A1, 883885, 71683, 58086, 56879\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 215 to 255 \u0026amp; 888\u003c\/li\u003e\n\u003cli\u003eFord small block V-8 engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e71683A1\u003c\/li\u003e\n\u003cli\u003e883885\u003c\/li\u003e\n\u003cli\u003e71683\u003c\/li\u003e\n\u003cli\u003e58086\u003c\/li\u003e\n\u003cli\u003e56879\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-3584-1 circulating water pump fit?\u003c\/strong\u003e The Sierra 18-3584-1 fits Mercruiser 215 to 255 and 888 engines, as well as Ford small block V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-3584-1 replace?\u003c\/strong\u003e It replaces OEM and aftermarket numbers 71683A1, 883885, 71683, 58086, and 56879, so any of those numbers point to this same Sierra circulating water pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3584-1 water pump made from?\u003c\/strong\u003e It is made from stainless steel, chosen for its resistance to corrosion in marine cooling system environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra circulating water pump weigh?\u003c\/strong\u003e The Sierra 18-3584-1 circulating water pump weighs 12.59 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a direct OEM replacement or a generic part?\u003c\/strong\u003e The 18-3584-1 is engineered as a direct replacement for the original Mercruiser and Ford small block V-8 circulating pumps it cross-references, matching the mounting and drive configuration of the parts it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this pump work on a Mercruiser 888 engine?\u003c\/strong\u003e Yes, the Sierra 18-3584-1 is listed for Mercruiser 215 to 255 and 888 applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3584-1 fit Ford small block V-8 marine engines?\u003c\/strong\u003e Yes, this circulating water pump is designated for Ford small block V-8 engines in addition to the listed Mercruiser applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat function does a circulating water pump serve on a marine engine?\u003c\/strong\u003e A circulating water pump like the Sierra 18-3584-1 moves coolant through the engine block to regulate operating temperature during running.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if I need part number 18-3584-1 versus another Sierra pump?\u003c\/strong\u003e If your old pump or parts diagram references 71683A1, 883885, 71683, 58086, or 56879, the Sierra 18-3584-1 is the correct cross-referenced replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3584-1 pump fully assembled and ready to install?\u003c\/strong\u003e Yes, the 18-3584-1 circulating water pump ships as a complete assembled unit weighing 12.59 pounds.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988154396891,"sku":"SIE-18-3584-1","price":186.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-3584-1__23443.1722496911.500.750.jpg?v=1785188502","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3584-1-circulating-water-pump-bi-directional-for-crusader-inboard-engine-cooling-systems","provider":"Good Vibes Marina","version":"1.0","type":"link"}