{"product_id":"sierra-18-70948-molded-hose-cooler-to-thermostat-housing-replaces-mercruiser-32-807407-fits-454-502-mag-mpi-and-7-4lx-mpi-bravo-gen-vi","title":"Sierra Molded Hose 18-70948 - Cooler to Thermostat Housing for MerCruiser 454 Mag MPI, 7.4LX MPI Bravo, 502 Mag MPI (Gen VI)","description":"\u003cp\u003eThis Sierra molded hose, part number 18-70948, is a direct-fit cooling system hose engineered to connect the cooler to the thermostat housing on applicable MerCruiser inboard\/sterndrive engines. It is molded (not a cut-to-length universal hose) so it follows the exact routing path required for a clean, factory-style installation without kinking or restricting coolant flow. The hose is finished in white and is built to Sierra's quality standard, which the company states meets or exceeds the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003eIt is designed for use on the 454 Mag MPI (Gen VI), 7.4LX MPI Bravo (Gen VI), and 502 Mag MPI (Gen VI) engine platforms, and it replaces OEM number 32-807407. Sierra supplies OEM engine manufacturers and boat builders with cooling system components daily, so this hose is manufactured to hold up to sustained heat cycling and the harsh marine operating environment. Replacing a cracked, softened, or leaking cooler-to-thermostat-housing hose with this molded part restores proper coolant circulation and helps prevent overheating.\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 18-70948\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Molded Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Cooler to thermostat housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.92 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282265625\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 32-807407\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e454 Mag MPI (Gen VI) (1996-01)\u003c\/li\u003e\n\u003cli\u003e7.4LX MPI Bravo (Gen VI) (1996-97)\u003c\/li\u003e\n\u003cli\u003e502 Mag MPI (Gen VI) (1996-01)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e32-807407\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-70948 molded hose connect?\u003c\/strong\u003e The Sierra 18-70948 molded hose runs from the cooler to the thermostat housing on the applicable MerCruiser engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines is part number 18-70948 designed for?\u003c\/strong\u003e It fits the 454 Mag MPI (Gen VI) (1996-01), the 7.4LX MPI Bravo (Gen VI) (1996-97), and the 502 Mag MPI (Gen VI) (1996-01) engine platforms.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-70948 replace?\u003c\/strong\u003e Sierra 18-70948 replaces OEM number 32-807407.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a molded hose or a universal cut-to-length hose?\u003c\/strong\u003e 18-70948 is a molded hose, shaped to the specific cooler-to-thermostat-housing routing rather than a straight length that needs to be bent or clamped into place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-70948 hose?\u003c\/strong\u003e The hose is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-70948 hose weigh?\u003c\/strong\u003e It weighs 0.92 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fit engines outside the listed MerCruiser models?\u003c\/strong\u003e 18-70948 is specified for the 454 Mag MPI (Gen VI), 7.4LX MPI Bravo (Gen VI), and 502 Mag MPI (Gen VI); confirm your engine matches one of these before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-70948 a genuine aftermarket replacement?\u003c\/strong\u003e Yes, it is a Sierra-manufactured replacement part built to meet or exceed the OEM 32-807407 hose it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat signs indicate the cooler-to-thermostat-housing hose needs replacement?\u003c\/strong\u003e Cracking, softening, or coolant leaks at the fittings on the original hose are signs it should be replaced with a part like the 18-70948.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e You receive one Sierra 18-70948 molded hose for the cooler-to-thermostat-housing connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-70948 hose?\u003c\/strong\u003e The UPC for this part is 808282265625.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988363292891,"sku":"SIE-18-70948","price":40.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-70948_lg__57692.1558131053.500.750.jpg?v=1785188984","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-70948-molded-hose-cooler-to-thermostat-housing-replaces-mercruiser-32-807407-fits-454-502-mag-mpi-and-7-4lx-mpi-bravo-gen-vi","provider":"Good Vibes Marina","version":"1.0","type":"link"}