{"product_id":"merc-565","title":"MerCruiser Exhaust Manifold Rubber Cap 805727001","description":"\u003ch2\u003eExhaust Manifold Rubber Cap — Part 805727001\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e805727001 \/ 19-805727001\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMercury Marine \/ MerCruiser \/ Quicksilver\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOfficial Product Type\u003c\/th\u003e\n\u003ctd\u003eRubber Cap — Exhaust Manifold \/ Elbow Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSystem\u003c\/th\u003e\n\u003ctd\u003eExhaust System — Manifold Cooling Hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSupersedes\u003c\/th\u003e\n\u003ctd\u003e805727 \/ 19-805727\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRetained By\u003c\/th\u003e\n\u003ctd\u003eWorm-gear clamp 815504220 \/ 54-815504220\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eQuantity Required\u003c\/th\u003e\n\u003ctd\u003eTypically 2 per applicable V8 engine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC \/ GTIN\u003c\/th\u003e\n\u003ctd\u003e745061280304\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThis is the genuine OEM rubber cap used in MerCruiser exhaust manifold and exhaust elbow assemblies on selected V8 engines. It is part of the exhaust manifold cooling hardware — not a generic protective cap. The cap is retained by a worm-gear clamp and typically appears twice on applicable engines, once per side. If one cap shows heat damage or leakage, inspect the opposite-side cap and its clamp at the same time.\u003c\/p\u003e\n\n\u003ch2\u003eSupersedes \/ Part Number Reference\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent OEM number:\u003c\/strong\u003e 805727001 \/ 19-805727001\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupersedes:\u003c\/strong\u003e 805727 \/ 19-805727\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eMerCruiser used several exhaust manifold, riser, and cooling arrangements within the same engine family. Confirm fitment by engine serial number and the applicable exhaust manifold diagram.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5.7L \/ 350 CID V8\u003c\/strong\u003e — 5.7L Alpha EFI TBI, 5.7L Bravo EFI TBI, and other 5.7L applications using the same capped manifold arrangement\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e7.4L \/ 454 CID V8\u003c\/strong\u003e — 7.4L MIE Gen V, 7.4L MIE MPI Gen V, 7.4L TBI MIE Gen VI, and additional 7.4L \/ 454 exhaust manifold assemblies\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e454 Magnum \/ 8.2L \/ 502 CID V8\u003c\/strong\u003e — Selected 454 Magnum and 502 Magnum big-block applications where the exhaust manifold diagram specifies 805727001\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen This Part Needs Replacement\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eThe rubber is cracked, hardened, or distorted from heat exposure\u003c\/li\u003e\n  \u003cli\u003eCoolant or raw water is leaking around the cap\u003c\/li\u003e\n  \u003cli\u003eThe cap has swollen and can no longer seat correctly\u003c\/li\u003e\n  \u003cli\u003eThe retaining clamp can no longer secure it properly\u003c\/li\u003e\n  \u003cli\u003eThe exhaust manifold is being replaced or serviced\u003c\/li\u003e\n  \u003cli\u003eThe original cap was damaged during disassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA heat-aged or deteriorated cap should not be reused during manifold service.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Parts\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e815504220 \/ 54-815504220 — Worm-gear clamp (retains this cap — search by part number)\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/8131418521636\"\u003eMercury MerCruiser Quicksilver Exhaust Manifold Assembly 807078T10\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e816900A5 \/ 816900A9 — Exhaust elbow assemblies (search by part number)\u003c\/li\u003e\n  \u003cli\u003e863724 — Standard-cooling exhaust gasket (search by part number)\u003c\/li\u003e\n  \u003cli\u003e863726 — Exhaust gasket for riser-kit applications (search by part number)\u003c\/li\u003e\n  \u003cli\u003e862210A01 — Drain elbow kit (search by part number)\u003c\/li\u003e\n  \u003cli\u003e8M0119211 — Drain plug kit (search by part number)\u003c\/li\u003e\n  \u003cli\u003e93320A14 — 3-inch exhaust riser kit (search by part number)\u003c\/li\u003e\n  \u003cli\u003e807477A5 — 6-inch exhaust riser kit (search by part number)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect the manifold connection surface before installing the new cap\u003c\/li\u003e\n  \u003cli\u003eReplace a corroded or stretched retaining clamp (815504220) at the same time\u003c\/li\u003e\n  \u003cli\u003eSeat the rubber cap fully before tightening the clamp\u003c\/li\u003e\n  \u003cli\u003eCheck the opposite-side cap while access is open — both typically wear at the same rate\u003c\/li\u003e\n  \u003cli\u003ePressure-test or inspect the cooling and exhaust system for leakage after service\u003c\/li\u003e\n  \u003cli\u003eFollow the applicable MerCruiser service procedure for the exact manifold arrangement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMost common customer issue:\u003c\/strong\u003e Ordering a single cap when two are needed. Most applicable V8 engines use one cap per manifold — two total per engine. If you're replacing due to leakage or heat damage, order a pair and replace both clamps (815504220) at the same time to avoid a repeat job.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e Ideal for customers servicing or replacing MerCruiser V8 exhaust manifolds, addressing coolant weeps at the manifold cap area, or completing a full exhaust manifold refresh on high-hour engines. A low-cost component that's easy to miss during a manifold job and commonly the source of post-service leaks if reused.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563873697828,"sku":"805727","price":2.1,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/4af2adf2-f373-4f12-85f6-ce15e52aebca.png?v=1789605097","url":"https:\/\/marisolmarine.com\/products\/merc-565","provider":"Marisol Marine Company","version":"1.0","type":"link"}