{"product_id":"sierra-18-0720-closed-dry-joint-exhaust-gasket-replaces-mercruiser-27-864549a02-fits-4-3l-5-0l-5-7l-6-2l","title":"Sierra 18-0720 Closed Dry-Joint Gasket, Replaces Mercruiser 27-864549A02, Fits 4.3L Alpha\/Bravo (2002 and Newer)","description":"\u003cp\u003eThe Sierra 18-0720 is a Closed Dry-Joint Gasket engineered for MerCruiser 4.3L Alpha and Bravo drive applications built 2002 and newer without engine catalyst. It seals the joint between the dry-joint exhaust manifold and riser, a design used on modern MerCruiser sterndrive engines to keep raw cooling water separated from the exhaust path at the manifold-to-riser connection. The gasket is round in shape and finished in white, and is sized to mate directly with the Sierra 18-1843 manifold and Sierra 18-1845 riser, making it a straightforward drop-in replacement when servicing or resealing this joint.\u003c\/p\u003e\u003cp\u003eThis is the \"Closed\" style gasket in Sierra's dry-joint gasket lineup; the same part family is also offered in Open (18-0721) and Restricted (18-0722) configurations, so it is important to confirm the closed-style gasket is the correct one for your manifold-to-riser setup before ordering. The gasket directly replaces Mercruiser 27-864549A02 and 27-864549A01, letting owners source a Sierra-branded equivalent without hunting down the original Mercruiser part number. As with all Sierra engine and drive parts, it is built to meet or exceed the specifications of the original equipment part it replaces and is designed to hold up to the heat and corrosion exposure of the marine exhaust environment.\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 18-0720\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Closed Dry-Joint Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282359447\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e MerCruiser 4.3L Alpha\/Bravo, 2002 and newer, without engine catalyst\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With:\u003c\/strong\u003e Manifold Sierra Part Number 18-1843 and Riser Sierra Part Number 18-1845\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelated Variants:\u003c\/strong\u003e Open Dry-Joint Gasket 18-0721, Restricted Dry-Joint Gasket 18-0722\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser 4.3L Alpha\/Bravo, 2002 and newer, without engine catalyst\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 27-864549A02\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-864549A01\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0720 gasket fit?\u003c\/strong\u003e The Sierra 18-0720 Closed Dry-Joint Gasket fits MerCruiser 4.3L Alpha and Bravo drive applications built 2002 and newer without engine catalyst.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat Mercruiser part numbers does 18-0720 replace?\u003c\/strong\u003e It replaces Mercruiser 27-864549A02 and 27-864549A01.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0720 an Open, Closed, or Restricted style gasket?\u003c\/strong\u003e It is the Closed style dry-joint gasket. Sierra also offers this same gasket in an Open style (18-0721) and a Restricted style (18-0722), so confirm which style your manifold-to-riser joint requires before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat manifold and riser does this gasket pair with?\u003c\/strong\u003e The 18-0720 gasket is used with the Sierra 18-1843 manifold and Sierra 18-1845 riser at the dry-joint connection between them.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and shape is the 18-0720 gasket?\u003c\/strong\u003e It is a round gasket finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0720 gasket weigh?\u003c\/strong\u003e The Sierra 18-0720 Closed Dry-Joint Gasket weighs 0.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0720 gasket genuine Sierra or an aftermarket copy?\u003c\/strong\u003e It is a genuine Sierra-branded part, engineered to meet or exceed the specifications of the original Mercruiser equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between 18-0720, 18-0721, and 18-0722?\u003c\/strong\u003e 18-0720 is the Closed style dry-joint gasket, 18-0721 is the Open style, and 18-0722 is the Restricted style; all three are part of the same dry-joint gasket family but are not interchangeable, so the correct style must be matched to the manifold-and-riser setup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0720 gasket work on engines with a catalyst?\u003c\/strong\u003e No, the 18-0720 is fitted to MerCruiser 4.3L Alpha\/Bravo applications 2002 and newer without engine catalyst.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0720?\u003c\/strong\u003e You receive one Sierra 18-0720 Closed Dry-Joint Gasket, sized for the joint between the 18-1843 manifold and 18-1845 riser.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085584091,"sku":"SIE-18-0720","price":54.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0720__87403.1558184516.500.750.jpg?v=1785187985","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0720-closed-dry-joint-exhaust-gasket-replaces-mercruiser-27-864549a02-fits-4-3l-5-0l-5-7l-6-2l","provider":"Good Vibes Marina","version":"1.0","type":"link"}