{"product_id":"merc-875","title":"Mercury MerCruiser Quicksilver 3-Inch Riser Extension Kit 864929A3 | Standard Cooling Dry Joint","description":"\u003ch2\u003eMercury \/ Quicksilver OEM 3-Inch Riser Extension Kit — Part No. 864929A3\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e864929A3\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMercury Marine \/ Quicksilver\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eExhaust Riser Extension Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eExtension Height\u003c\/th\u003e\n\u003ctd\u003e3 in. \/ 76 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eKit Contents\u003c\/th\u003e\n\u003ctd\u003e2 riser extensions (1 kit services one engine)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eExhaust System\u003c\/th\u003e\n\u003ctd\u003eDry-Joint\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCooling Type\u003c\/th\u003e\n\u003ctd\u003eStandard \/ Raw-Water Cooling\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eUPC \/ GTIN\u003c\/th\u003e\n\u003ctd\u003e745061564657\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eSupersedes \/ Related\u003c\/th\u003e\n\u003ctd\u003e864929A1 (earlier reference)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAbout This Kit\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e864929A3\u003c\/strong\u003e is a genuine Mercury Marine \/ Quicksilver OEM exhaust riser extension kit that raises the exhaust elbow connection by \u003cstrong\u003e3 inches (76 mm)\u003c\/strong\u003e on MerCruiser dry-joint exhaust systems with standard (raw-water) cooling. Each kit contains two riser extensions, providing everything needed to service one complete engine installation. Proper riser height is critical in marine applications — adequate separation between the exhaust outlet and waterline helps prevent water from entering the exhaust system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant distinction:\u003c\/strong\u003e The \u003cstrong\u003eA3\u003c\/strong\u003e suffix identifies this as the \u003cstrong\u003estandard \/ raw-water cooling\u003c\/strong\u003e version. The companion kit \u003cstrong\u003e864929A4\u003c\/strong\u003e is for closed-cooling applications. Both use 3-inch extensions but they are \u003cem\u003enot\u003c\/em\u003e interchangeable — confirm your cooling system type before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cp\u003eConfirm the engine serial number, cooling-system type, and dry-joint exhaust configuration before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2004–2016 MerCruiser sterndrive V6 \u0026amp; V8 — 305 CID \/ 5.0L, 350 CID \/ 5.7L, 377 CID \/ 6.2L (non-EC engines, SN 0W310000 and up)\u003c\/li\u003e\n  \u003cli\u003e2002–2016 MerCruiser inboard V8 — 350 CID \/ 5.7L, 377 CID \/ 6.2L (non-EC engines, SN 0M390000 and up)\u003c\/li\u003e\n  \u003cli\u003eStandard \/ raw-water cooled dry-joint exhaust manifold configurations only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen This Kit Is Needed\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRiser spacers are corroded, pitted, or cracked\u003c\/li\u003e\n  \u003cli\u003eExhaust system rebuild requiring replacement of original 3-inch spacers\u003c\/li\u003e\n  \u003cli\u003eExhaust outlet height needs to be restored to factory specification\u003c\/li\u003e\n  \u003cli\u003eNew boat installation requiring additional riser height\u003c\/li\u003e\n  \u003cli\u003eWater intrusion suspected due to insufficient exhaust-to-waterline separation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the engine uses a \u003cstrong\u003edry-joint exhaust manifold\u003c\/strong\u003e — do not install on wet-joint systems\u003c\/li\u003e\n  \u003cli\u003eConfirm \u003cstrong\u003estandard \/ raw-water cooling\u003c\/strong\u003e — closed-cooling engines require 864929A4\u003c\/li\u003e\n  \u003cli\u003eInspect both exhaust manifolds and elbows for corrosion or erosion before reassembly\u003c\/li\u003e\n  \u003cli\u003eReplace dry-joint gaskets during reassembly — gasket selection depends on cooling configuration (restrictor 864850A02, block-off 864549A02, or full-flow 864547A02)\u003c\/li\u003e\n  \u003cli\u003eCheck all mating surfaces for pitting before torquing fasteners\u003c\/li\u003e\n  \u003cli\u003eVerify exhaust hose and elbow alignment after the 3-inch extension is installed\u003c\/li\u003e\n  \u003cli\u003eFollow the applicable MerCruiser service manual for torque specs and gasket selection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 × 3-inch (76 mm) exhaust riser extensions\u003c\/li\u003e\n  \u003cli\u003eOne kit services one complete engine\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated \u0026amp; Alternate Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e864929A1\u003c\/strong\u003e — earlier related reference (superseded by A3)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e864929A4\u003c\/strong\u003e — 3 in. riser extension kit, \u003cstrong\u003eclosed-cooling\u003c\/strong\u003e version\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e865995A01\u003c\/strong\u003e — 1.7 in. riser extension kit, standard cooling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e865996A01\u003c\/strong\u003e — 1.7 in. riser extension kit, closed cooling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e864850A02\u003c\/strong\u003e — restrictor gasket for riser \/ cooling circuit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e864549A02\u003c\/strong\u003e — block-off gasket\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e864547A02\u003c\/strong\u003e — full-flow gasket\u003c\/li\u003e\n  \u003cli\u003eSierra \u003cstrong\u003e18-1847K\u003c\/strong\u003e — aftermarket 3 in. dry-joint standard-cooling spacer kit (cross-reference)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/11077679218724\"\u003eSierra Exhaust Manifold — Dry Joint — 47-1842\u003c\/a\u003e — dry-joint exhaust manifold for MerCruiser applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003eThe single most common ordering mistake on this kit is confusing \u003cstrong\u003estandard cooling (A3)\u003c\/strong\u003e with \u003cstrong\u003eclosed cooling (A4)\u003c\/strong\u003e. Both are 3-inch dry-joint kits and look identical, but they are engineered for different cooling circuits. Check your engine's cooling system type first — if your engine uses a heat exchanger (fresh-water cooled), you need the A4; if it circulates raw lake or sea water directly through the engine, you need the A3. When in doubt, your engine's serial number and the parts diagram will confirm which version applies.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563897651236,"sku":"864929A3","price":1344.92,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/1c32d845-e167-4959-850b-15c3a0414c12.png?v=1789416063","url":"https:\/\/marisolmarine.com\/products\/merc-875","provider":"Marisol Marine Company","version":"1.0","type":"link"}