{"product_id":"marine-molded-water-hose-for-mercruiser-2-5l-3-0l-distribution-block-to-water-pump-replaces-32-47640-sierra-18-70931","title":"Sierra 18-70931 Molded Hose, Distribution Block to Water Pump, Replaces 32-96879, Fits Mercruiser MCM 120\/2.5L, 140\/3.0L, 160\/165","description":"\u003cp\u003eThe Sierra 18-70931 Molded Hose is a purpose-shaped cooling system hose that runs from the distribution block to the water pump on applicable Mercruiser I\/O engines. Unlike a straight-cut length of hose, this molded hose is formed to the exact bend and routing needed for this connection point, so it seats correctly without kinking or requiring extra clamps to hold a shape. It is built from a rubber and plastic construction in white, sized to a nominal wall thickness of 0.12 inches, and is designed to fit Mercruiser MCM 120\/2.5L, 140\/3.0L, and 160\/165 applications. As a direct cross-reference to Mercruiser Stern Drive part number 32-96879, it restores factory cooling flow between the distribution block and water pump and is intended to meet or exceed the performance of the original equipment part it replaces. This hose is a straightforward maintenance-and-repair item for boat owners servicing the cooling circuit on a compatible Mercruiser engine, whether replacing a cracked, hardened, or leaking original hose or restoring a system after other cooling work.\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 18-70931\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Molded Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Distribution block to water pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic, Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Wall Thickness:\u003c\/strong\u003e 0.12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282145934\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercruiser MCM 120\/2.5L, MCM 140\/3.0L, MCM 160\/165\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 32-96879\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser MCM 120\/2.5L\u003c\/li\u003e\n\u003cli\u003eMercruiser MCM 140\/3.0L\u003c\/li\u003e\n\u003cli\u003eMercruiser MCM 160\/165\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e32-96879\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-70931 Molded Hose connect?\u003c\/strong\u003e The 18-70931 Molded Hose runs from the distribution block to the water pump in the engine cooling circuit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does the 18-70931 fit?\u003c\/strong\u003e It is designed to fit Mercruiser MCM 120\/2.5L, MCM 140\/3.0L, and MCM 160\/165 applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-70931 a direct replacement for a Mercruiser OEM hose?\u003c\/strong\u003e Yes, it cross-references to Mercruiser Stern Drive part number 32-96879 and is built to meet or exceed the performance of that original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-70931 Molded Hose made from?\u003c\/strong\u003e It is made from a rubber and plastic construction, finished in white, with a nominal wall thickness of 0.12 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-70931 hose weigh?\u003c\/strong\u003e The Sierra 18-70931 Molded Hose weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is this hose molded instead of a straight length?\u003c\/strong\u003e The 18-70931 is molded to the specific bend needed between the distribution block and water pump, so it routes correctly without kinking rather than relying on a cut length of straight hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the 18-70931 distribution block hose?\u003c\/strong\u003e Replace it when the original distribution-block-to-water-pump hose on a compatible Mercruiser engine shows cracking, hardening, or leaking, which are common signs of a worn cooling hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-70931 include any clamps or fittings?\u003c\/strong\u003e The listing covers the Sierra 18-70931 Molded Hose itself; no additional components are specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-70931 hose?\u003c\/strong\u003e The UPC for the Sierra 18-70931 Molded Hose is 808282145934.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-70931 an OEM or aftermarket part?\u003c\/strong\u003e It is an aftermarket Sierra part manufactured to meet or exceed the original equipment hose it replaces, cross-referencing Mercruiser 32-96879.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988362735835,"sku":"SIE-18-70931","price":30.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__11375.1753840681.500.750.jpg?v=1785188683","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-molded-water-hose-for-mercruiser-2-5l-3-0l-distribution-block-to-water-pump-replaces-32-47640-sierra-18-70931","provider":"Good Vibes Marina","version":"1.0","type":"link"}