{"product_id":"sierra-18-1909-1-exhaust-manifold-riser-elbow-with-hardware-replaces-omc-913784","title":"Sierra 18-1909-1 Manifold Elbow, Replaces OMC 913784, Use with 18-1986-1 Exhaust Manifold","description":"\u003cp\u003eThe Sierra 18-1909-1 Manifold Elbow is a direct-replacement exhaust manifold elbow built to connect to the 18-1986-1 exhaust manifold as part of a marine engine's exhaust system. The manifold elbow routes exhaust gases and cooling water away from the manifold, and this part is designed to work with the corresponding 18-8507 mounting kit for a complete, correctly sealed installation.\u003c\/p\u003e\u003cp\u003eAs an OEM cross-reference replacement, the 18-1909-1 is built to match the fit and function of the original OMC 913784 elbow, giving boat owners and marine technicians a straightforward way to source a replacement without hunting down a discontinued original part. Because exhaust manifold elbows are exposed to constant heat cycling and saltwater or freshwater cooling flow, replacing a corroded or cracked elbow with a properly matched part like the 18-1909-1 helps maintain a tight, leak-free exhaust and cooling path.\u003c\/p\u003e\u003cp\u003eThis part is sold as the manifold elbow itself; the separate 18-8507 mounting kit (which includes the gasket used with this elbow) should be ordered alongside it to complete the installation. Always confirm that your engine's exhaust manifold is the 18-1986-1 before ordering, since manifold elbows are matched to a specific manifold design.\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 18-1909-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Manifold Elbow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 26.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsed With Manifold:\u003c\/strong\u003e 18-1986-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Mounting Kit:\u003c\/strong\u003e 18-8507\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 913784, 3855270, 3850459\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282202859\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse with Manifold 18-1986-1\u003c\/li\u003e\n\u003cli\u003ePair with Mounting Kit 18-8507 for complete installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e913784\u003c\/li\u003e\n\u003cli\u003e3855270\u003c\/li\u003e\n\u003cli\u003e3850459\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat manifold does the Sierra 18-1909-1 fit?\u003c\/strong\u003e The Sierra 18-1909-1 manifold elbow is designed for use with the 18-1986-1 exhaust manifold, so confirm your engine uses that manifold before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1909-1 a direct replacement for OMC 913784?\u003c\/strong\u003e Yes, the 18-1909-1 manifold elbow is built to replace OMC 913784, along with the additional cross-reference numbers 3855270 and 3850459.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1909-1 manifold elbow weigh?\u003c\/strong\u003e The Sierra 18-1909-1 manifold elbow weighs 26.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to buy anything else to install the 18-1909-1?\u003c\/strong\u003e Yes, the 18-1909-1 should be paired with the 18-8507 mounting kit, which supplies the gasket and hardware needed for a complete installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1909-1 include a gasket?\u003c\/strong\u003e No, the gasket used with the 18-1909-1 elbow is included in the separate 18-8507 mounting kit rather than with the elbow itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers cross-reference to the Sierra 18-1909-1?\u003c\/strong\u003e The 18-1909-1 cross-references to OEM numbers 913784, 3855270, and 3850459.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace a manifold elbow like the 18-1909-1?\u003c\/strong\u003e Manifold elbows are exposed to constant heat and cooling water flow, so a cracked, corroded, or leaking elbow is typically replaced with a matched part such as the 18-1909-1 to restore a sealed exhaust and cooling path.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-1909-1 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-1909-1 is a Sierra-branded aftermarket manifold elbow engineered as a replacement for the OEM 913784 elbow and its cross-referenced numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-1909-1 with a different exhaust manifold?\u003c\/strong\u003e The 18-1909-1 is specified for use with the 18-1986-1 exhaust manifold; fit with other manifold models is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the Sierra 18-1909-1?\u003c\/strong\u003e The 18-1909-1 listing covers the manifold elbow itself; the mounting kit (18-8507) with its gasket is a separate item needed to complete the installation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089188571,"sku":"SIE-18-1909-1","price":325.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__43981.1771440787.500.750.jpg?v=1785188575","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-1909-1-exhaust-manifold-riser-elbow-with-hardware-replaces-omc-913784","provider":"Good Vibes Marina","version":"1.0","type":"link"}