{"product_id":"mercury-mercruiser-cooling-hose-32-864552","title":"Mercury MerCruiser Quicksilver Cooling Hose — 32-864552","description":"\u003ch2\u003eMercury MerCruiser Quicksilver Molded Cooling Hose — 32-864552\u003c\/h2\u003e\n\n\u003cp\u003eThis is a genuine OEM molded cooling hose from Mercury Marine, connecting the \u003cstrong\u003ethermostat housing to the upper exhaust manifold\u003c\/strong\u003e in select MerCruiser gasoline engine cooling systems. Molded to the exact curvature of the original routing, it installs without modification and restores proper coolant flow through your engine's closed cooling circuit.\u003c\/p\u003e\n\n\u003cp\u003eCooling hoses are a common service item — heat cycling, coolant chemistry, and time all cause rubber to harden, crack, or swell at the molded ends. When a cooling hose fails, the result is coolant loss and engine overheating. Using the correct OEM hose ensures the right wall thickness, bend geometry, and material compatibility for your engine.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 864552 (full reference: 32-864552)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury Quicksilver\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Molded engine cooling hose\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Engine cooling — thermostat housing to upper exhaust manifold\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New, genuine OEM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGTIN \/ UPC:\u003c\/strong\u003e 745061554566\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSelect MerCruiser sterndrive \/ inboard gasoline engines using the thermostat-housing-to-upper-manifold hose routing\u003c\/li\u003e\n  \u003cli\u003eCompatibility varies by engine model, serial number range, and cooling configuration — confirm via engine serial number before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSerial Number Fitment Notice\u003c\/h3\u003e\n\u003cp\u003eMerCruiser uses several similar molded hoses in the thermostat housing, exhaust manifold, heat exchanger, and drain areas. Always verify your engine serial number and cross-reference the cooling-system parts diagram to confirm 32-864552 is the correct hose for your specific connection point.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHose is cracked, hardened, swollen, or chafed\u003c\/li\u003e\n  \u003cli\u003eLeaking or seeping at the molded ends or clamp points\u003c\/li\u003e\n  \u003cli\u003eVisible deterioration or deformation from heat cycling\u003c\/li\u003e\n  \u003cli\u003eAny coolant loss or engine overheating traced to this hose location\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAllow the engine to cool completely before beginning service\u003c\/li\u003e\n  \u003cli\u003eNote original hose routing and clamp positions before removal\u003c\/li\u003e\n  \u003cli\u003eInspect the thermostat-housing port and upper-manifold fitting for corrosion or damage\u003c\/li\u003e\n  \u003cli\u003eReplace clamps if worn or corroded\u003c\/li\u003e\n  \u003cli\u003eVerify the system is leak-free at operating temperature after installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/11167580618788\"\u003eMercury MerCruiser 864579 Cooling Hose — Check Valve to Thermostat Housing\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/11167580586020\"\u003eMercury MerCruiser Quicksilver Cooling Hose 864578 — Drain Fitting to Check Valve\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/11167580651556\"\u003eMercury MerCruiser 865317T02 2-Bib Hose Fitting Assembly — Cool Fuel \/ Raw-Water Cooling\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/8131405316132\"\u003eMercury MerCruiser Nylon Hose Clamp — 54-415825\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/8131543629860\"\u003e#3 SS Mini Hose Clamp 5\/16\"–9\/16\"\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest use:\u003c\/strong\u003e Order 32-864552 specifically when your cooling-system diagram shows the \u003cstrong\u003ethermostat housing to upper exhaust manifold\u003c\/strong\u003e connection — that location is the key identifier. MerCruiser runs several similar-looking molded hoses in this area, and ordering the wrong one is a common mistake. The nearby hoses 864578 (drain fitting to check valve) and 864579 (check valve to thermostat housing) are frequent mix-ups — have your engine serial number ready and compare against the parts diagram before confirming your order. If you're not sure, our parts desk can cross-reference your serial number and diagram position to confirm the right part.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":51324692201508,"sku":"864552","price":49.19,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/c2a13539-3d0b-4efc-800a-19e870ae4511_af7d102a-5071-4b18-91f0-50a3876ffb7e.png?v=1788202206","url":"https:\/\/marisolmarine.com\/products\/mercury-mercruiser-cooling-hose-32-864552","provider":"Marisol Marine Company","version":"1.0","type":"link"}