{"product_id":"sierra-18-4009-exhaust-manifold-end-plate-replaces-mercruiser-60252a2-60252-fits-sierra-18-1960-1-manifold-i-o-mercruiser-cooling-system","title":"Sierra 18-4009 Manifold Front Plate, Replaces Mercury Marine 60252A2, Fits Port and Starboard Exhaust Manifolds","description":"\u003cp\u003eThe Sierra 18-4009 is a front (end) plate for marine exhaust manifolds, designed to mount to the front of the manifold casting and seal the internal water and exhaust passages. It is built to meet or exceed original equipment quality and is cross-referenced to Mercury Marine part number 60252A2, making it a direct equivalent for engines and manifold assemblies that call for that OEM plate.\u003c\/p\u003e\u003cp\u003eThis front plate is used with Sierra exhaust manifolds 18-1958-1 and 18-1962-1, and fits both the port and starboard versions of those manifolds, so a single part number covers either side of the engine. It pairs with the Sierra 18-8512 mounting kit, which supplies the matching 18-2832-1 front\/end plate gasket needed for a complete, sealed installation. The plate has a machined finish for a consistent, flat sealing surface against the manifold casting.\u003c\/p\u003e\u003cp\u003eBecause the manifold's internal water jacket runs past the front plate, a worn, cracked, warped, or corroded original plate is a common source of coolant leaks and can allow raw water to escape or air to enter the cooling passages. Replacing the 18-4009 along with its mating gasket restores a tight seal at this joint and is a routine step when servicing or rebuilding the 18-1958-1 or 18-1962-1 manifold.\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 18-4009\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold Front\/End Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury Marine 60252A2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Manifolds:\u003c\/strong\u003e 18-1958-1, 18-1962-1 (Port \u0026amp; Starboard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kit:\u003c\/strong\u003e 18-8512 (includes 18-2832-1 gasket)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.41 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999563200\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSierra Exhaust Manifolds 18-1958-1 and 18-1962-1, Port and Starboard\u003c\/li\u003e\n\u003cli\u003eUsed with Sierra Mounting Kit 18-8512\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 60252A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-4009 fit?\u003c\/strong\u003e The Sierra 18-4009 front plate is used with exhaust manifolds 18-1958-1 and 18-1962-1, and it fits both the port and starboard versions of those manifolds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-4009 the same as Mercury Marine 60252A2?\u003c\/strong\u003e Yes, the Sierra 18-4009 is cross-referenced to Mercury Marine part number 60252A2 and is built to meet or exceed original equipment quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this plate fit both port and starboard manifolds?\u003c\/strong\u003e Yes. The 18-4009 is designed for use with both the port and starboard 18-1958-1 and 18-1962-1 manifolds, so one part number works on either side.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gasket do I need with the 18-4009 front plate?\u003c\/strong\u003e The front plate pairs with the 18-2832-1 front\/end plate gasket, which is included in the Sierra 18-8512 mounting kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-4009 weigh?\u003c\/strong\u003e The Sierra 18-4009 front plate weighs 1.41 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the mounting kit used with this part?\u003c\/strong\u003e The 18-4009 uses the Sierra 18-8512 mounting kit, which includes the matching 18-2832-1 gasket for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-4009 have?\u003c\/strong\u003e The plate has a machined finish for a flat, consistent sealing surface against the exhaust manifold casting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the exhaust manifold front plate?\u003c\/strong\u003e A worn, cracked, or corroded front plate can leak at the manifold's water jacket; replacing the 18-4009 along with its gasket restores a proper seal during manifold service or rebuilds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-4009 an OEM or aftermarket part?\u003c\/strong\u003e The 18-4009 is a Sierra aftermarket replacement front plate, manufactured to meet or exceed the quality of the original Mercury Marine 60252A2 it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-4009 front plate?\u003c\/strong\u003e The Sierra 18-4009 measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-4009 come with mounting bolts?\u003c\/strong\u003e No, mounting bolts are supplied separately as part of the Sierra 18-8512 mounting kit, not with the 18-4009 plate alone.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988170846427,"sku":"SIE-18-4009","price":62.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-4009_lg__89745.1558126633.500.750.jpg?v=1785188249","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-4009-exhaust-manifold-end-plate-replaces-mercruiser-60252a2-60252-fits-sierra-18-1960-1-manifold-i-o-mercruiser-cooling-system","provider":"Good Vibes Marina","version":"1.0","type":"link"}