{"product_id":"sierra-18-3507-water-pump-kit-without-base-for-mercury-mariner-outboards-replaces-oem-46-60366a1","title":"Sierra 18-3507 Water Pump Kit without Base - Replaces Mercury Marine 46-60366A1 for Mercury\/Mariner Engines","description":"\u003cp\u003eThe Sierra 18-3507 Water Pump Kit is a complete rebuild kit for Mercury\/Mariner outboard and sterndrive water pumps, supplying every wear component needed to restore proper cooling system pressure except the pump base, which is sold separately. Rebuilding a water pump with the correct impeller, housing, gaskets, and o-rings restores raw water flow to the engine and helps prevent overheating caused by a worn or cracked impeller, a scored pump housing, or hardened gaskets that no longer seal.\u003c\/p\u003e\u003cp\u003eThis kit includes a new impeller, an impeller plate, an upper water pump housing, drain screw gaskets, a rubber washer, multiple water pump and base gaskets, and o-rings, giving an installer everything required to fully renew the pump above the base plate. Sierra manufactures the kit to meet or exceed the original equipment components it replaces, and each part is fit specific, so confirming part numbers before ordering is recommended to ensure proper fit.\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 18-3507\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Water Pump Kit (Without Base)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.35 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Rubber (impeller, gaskets, o-rings)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Brand:\u003c\/strong\u003e Mercury\/Mariner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999315977\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 46-60366A1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Impeller (18-3007), Impeller Plate (18-3107), Upper Water Pump Housing (18-3118), O-Ring (35-30271), Lower Water Pump Gasket (18-2823), Water Pump Gasket (18-2824), Water Pump Base Gasket (18-2825), Water Pump Base Gasket (18-2841), Drain Screw Gaskets x2 (18-2945), Rubber Washer (18-2948), O-Rings (18-7115, 18-7155, 18-7174)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for use with Mercury\/Mariner engines. This kit does not include the water pump base; verify part numbers against your existing pump components before ordering.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e46-60366A1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3507 Water Pump Kit include?\u003c\/strong\u003e The 18-3507 kit includes an impeller, an impeller plate, an upper water pump housing, a rubber washer, multiple water pump and base gaskets, drain screw gaskets, and several o-rings, covering every wear part in a Mercury\/Mariner water pump rebuild except the base.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3507 kit come with a water pump base?\u003c\/strong\u003e No, the Sierra 18-3507 is a Water Pump Kit without Base, so the base plate is not included and must be sourced separately if it needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the Sierra 18-3507 designed for?\u003c\/strong\u003e This kit is designed for use with Mercury\/Mariner engines that use a compatible water pump assembly; checking existing part numbers before ordering is recommended since fit is specific.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does Sierra 18-3507 replace?\u003c\/strong\u003e Sierra 18-3507 replaces Mercury Marine part number 46-60366A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3507 Water Pump Kit weigh?\u003c\/strong\u003e The kit weighs 0.35 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the impeller and gaskets made from in the 18-3507 kit?\u003c\/strong\u003e The impeller, gaskets, and o-rings in the 18-3507 kit are made of rubber.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3507 a genuine Mercury part or aftermarket?\u003c\/strong\u003e The 18-3507 is a Sierra-manufactured aftermarket kit built to meet or exceed the original equipment part it replaces, rather than a genuine Mercury Marine part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the impeller part number included in the 18-3507 kit?\u003c\/strong\u003e The impeller included in the Sierra 18-3507 kit is part number 18-3007.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many drain screw gaskets come in the 18-3507 kit?\u003c\/strong\u003e Two drain screw gaskets, part number 18-2945, are included in the Sierra 18-3507 Water Pump Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is it important to check part numbers before installing the 18-3507 kit?\u003c\/strong\u003e Because the Sierra 18-3507 kit is fit specific to certain Mercury\/Mariner water pump configurations, confirming part numbers against your existing components before installation helps ensure proper fit and sealing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988149678299,"sku":"SIE-18-3507","price":55.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3507_lg__30932.1558125403.500.750.jpg?v=1785188368","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3507-water-pump-kit-without-base-for-mercury-mariner-outboards-replaces-oem-46-60366a1","provider":"Good Vibes Marina","version":"1.0","type":"link"}