{"product_id":"sierra-18-3603-water-intake-hose-for-mercruiser-mr-alpha-one-gen-ii-sterndrives-replaces-32-8m0062309-13-7-8-in-x-3-4-in-i-d","title":"Sierra Water Intake Hose 18-3603, Replaces Mercruiser 32-43437, White","description":"\u003cp\u003eThe Sierra 18-3603 Water Intake Hose is a white marine-grade replacement hose engineered for boat engine cooling water intake systems. Built to meet or exceed original equipment quality, this hose is designed as a direct replacement for the corresponding Mercruiser water intake hose, giving boat owners and technicians a reliable option when the factory hose has degraded, cracked, or failed. Water intake hoses like this one route raw water from the intake source to the engine's cooling system, so material integrity and a secure fit are essential to prevent leaks, airlock, or overheating.\u003c\/p\u003e\u003cp\u003eConstructed from durable plastic material, the Sierra 18-3603 is built to hold up in the demanding marine environment where hoses are exposed to constant moisture, vibration, and temperature changes. It ships as a single unit (1 count) ready for installation. Because water intake hoses are fit-specific, it is important to confirm this part number matches the hose being replaced before ordering.\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 18-3603\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Water Intake Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.47 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282124731\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Hoses\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFit specific; confirm part number 18-3603 matches your existing hose before purchasing.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser 32-43437\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-3603 Water Intake Hose used for?\u003c\/strong\u003e It routes raw water into the engine's cooling water intake system on boats, replacing the original hose when it cracks, hardens, or fails.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-3603 replace?\u003c\/strong\u003e The Sierra 18-3603 corresponds to Mercruiser part number 32-43437.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is this hose?\u003c\/strong\u003e The Sierra 18-3603 Water Intake Hose is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3603 hose made from?\u003c\/strong\u003e It is made from plastic, chosen for durability in continuous marine water-intake use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3603 weigh?\u003c\/strong\u003e This water intake hose weighs 0.47 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many hoses come in the package?\u003c\/strong\u003e The Sierra 18-3603 ships as a single unit, one hose per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3603 a genuine Mercruiser part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-brand aftermarket replacement hose built to meet or exceed the quality of the original equipment part it replaces, corresponding to Mercruiser 32-43437.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-3603 fit any boat engine?\u003c\/strong\u003e No. This hose is fit specific, so the part number should be checked against the original hose before ordering to ensure proper fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3603?\u003c\/strong\u003e The UPC for the Sierra 18-3603 Water Intake Hose is 808282124731.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-3603 different from other Sierra water hoses?\u003c\/strong\u003e The 18-3603 is specifically cross-referenced to Mercruiser 32-43437, distinguishing it from other Sierra hose part numbers that replace different Mercruiser hoses.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988154757339,"sku":"SIE-18-3603","price":32.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3603_lg__64439.1558125888.500.750.jpg?v=1785188874","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3603-water-intake-hose-for-mercruiser-mr-alpha-one-gen-ii-sterndrives-replaces-32-8m0062309-13-7-8-in-x-3-4-in-i-d","provider":"Good Vibes Marina","version":"1.0","type":"link"}