{"product_id":"merc-613","title":"Mercury \/ Quicksilver 807988A03 Cast-Iron Exhaust Elbow Assembly | MerCruiser 4.3L \/ 5.0L \/ 5.7L | 4 in. 7° Center-Rise","description":"\u003ch2\u003ePart Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 807988A03\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury Marine \/ Quicksilver (Genuine OEM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Cast-Iron Exhaust Elbow Assembly — Center-Rise\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Diameter:\u003c\/strong\u003e 4 in. \/ 102 mm outside diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Angle:\u003c\/strong\u003e 7° downward\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Cast iron, hot-dipped and black top-coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Wet-joint center-rise exhaust system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e 2 brass 3\/4-14 pipe fittings and 2 plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket:\u003c\/strong\u003e Sold separately — see \u003ca href=\"\/products\/8131429007396\"\u003eExhaust Elbow Gasket 863726\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersedes:\u003c\/strong\u003e 807988A2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical Application Range:\u003c\/strong\u003e Through approximately model year 2002\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN \/ UPC:\u003c\/strong\u003e 745061289055\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight (approx.):\u003c\/strong\u003e 4.5 kg \/ 10 lb (cast-iron elbow)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat This Part Is\u003c\/h2\u003e\n\u003cp\u003eMercury \/ Quicksilver \u003cstrong\u003e807988A03\u003c\/strong\u003e is a genuine OEM cast-iron exhaust elbow assembly for selected GM-based MerCruiser V6 and V8 sterndrive and inboard engines equipped with a \u003cstrong\u003ecenter-rise exhaust manifold\u003c\/strong\u003e. The elbow connects the exhaust manifold outlet to the exhaust hose, routing exhaust gases and cooling water away from the engine. The \u003cstrong\u003e4 in. \/ 102 mm OD outlet\u003c\/strong\u003e exits at a \u003cstrong\u003e7° downward angle\u003c\/strong\u003e and the casting is hot-dipped and top-coated for corrosion protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e 807988A03 is for the older \u003cstrong\u003ewet-joint center-rise exhaust system\u003c\/strong\u003e. It is not compatible with later dry-joint MerCruiser exhaust configurations, which use different mating surfaces and gasket arrangements. The exhaust gasket is \u003cstrong\u003esold separately\u003c\/strong\u003e — order \u003ca href=\"\/products\/8131429007396\"\u003eExhaust Elbow Gasket 863726\u003c\/a\u003e at the same time.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cp\u003eFitment must be confirmed by engine model, serial number, manifold type, outlet diameter, and cooling-system configuration. Documented GM-based MerCruiser applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMerCruiser \u003cstrong\u003e4.3L V6\u003c\/strong\u003e — center-rise exhaust, sterndrive and inboard (through approx. 2002)\u003c\/li\u003e\n\u003cli\u003eMerCruiser \u003cstrong\u003e5.0L V8\u003c\/strong\u003e — center-rise exhaust, sterndrive and inboard (through approx. 2002)\u003c\/li\u003e\n\u003cli\u003eMerCruiser \u003cstrong\u003e5.7L \/ 350 CID V8\u003c\/strong\u003e — center-rise exhaust, sterndrive and inboard (through approx. 2002)\u003c\/li\u003e\n\u003cli\u003eOther GM-based MerCruiser V6\/V8 engines using the same center-rise 4 in. wet-joint exhaust configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways verify 807988A03 in the \u003cstrong\u003eexhaust manifold \/ elbow parts diagram for the specific engine serial number\u003c\/strong\u003e before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCast-iron exhaust elbow assembly (807988A03)\u003c\/li\u003e\n\u003cli\u003e2 × brass 3\/4-14 pipe fittings\u003c\/li\u003e\n\u003cli\u003e2 × plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket not included\u003c\/strong\u003e — order separately: \u003ca href=\"\/products\/8131429007396\"\u003eExhaust Elbow Gasket 863726\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen to Replace\u003c\/h2\u003e\n\u003cp\u003eReplace the exhaust elbow if inspection shows any of the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInternal corrosion, scaling, or restricted cooling-water passages\u003c\/li\u003e\n\u003cli\u003eExternal rust-through or holes in the casting\u003c\/li\u003e\n\u003cli\u003eCracks in the casting (visible or detected by pressure test)\u003c\/li\u003e\n\u003cli\u003eExhaust gas or water leakage at the elbow-to-manifold joint\u003c\/li\u003e\n\u003cli\u003eSevere pitting or deterioration at the gasket sealing surface\u003c\/li\u003e\n\u003cli\u003eEvidence of water intrusion toward the exhaust manifold or engine cylinders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMarine cast-iron exhaust elbows can corrode internally while appearing acceptable from the outside. Internal condition should be checked during any manifold service — a restricted or corroded elbow can allow water to back up toward the engine.\u003c\/p\u003e\n\n\u003ch2\u003eService Interval\u003c\/h2\u003e\n\u003cp\u003eMercury recommends inspecting exhaust elbows at regular engine service intervals. MerCruiser service guidelines generally call for exhaust system inspection every \u003cstrong\u003e2 years or 200 hours\u003c\/strong\u003e (whichever comes first) on saltwater-operated engines, and at least every 3 to 4 years on freshwater engines. Internal corrosion can progress rapidly in saltwater environments — do not defer inspection if the elbow has been in service for several seasons without being removed.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAlways install a new \u003ca href=\"\/products\/8131429007396\"\u003eexhaust elbow gasket (863726 or 8637251 depending on cooling configuration)\u003c\/a\u003e — do not reuse the old gasket\u003c\/li\u003e\n\u003cli\u003eInspect the mating exhaust manifold outlet flange for corrosion, warping, or damage before installing the new elbow\u003c\/li\u003e\n\u003cli\u003eClean both sealing surfaces of all old gasket material\u003c\/li\u003e\n\u003cli\u003eInspect the connected exhaust hose for heat cracking, softening, or deterioration and replace if needed\u003c\/li\u003e\n\u003cli\u003eCheck the included brass fittings and surrounding cooling-water hoses for condition\u003c\/li\u003e\n\u003cli\u003eVerify the correct 4 in. exhaust-hose connection at the elbow outlet\u003c\/li\u003e\n\u003cli\u003eTighten elbow fasteners evenly to the torque specified in the MerCruiser service procedure for the applicable engine\u003c\/li\u003e\n\u003cli\u003eAfter startup, check for exhaust gas or water leakage at the elbow joint and at the hose connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know if my engine uses a center-rise or dry-joint exhaust system?\u003c\/strong\u003e\u003cbr\u003eCenter-rise (wet-joint) exhaust systems route cooling water through the exhaust elbow alongside exhaust gases. The elbow has water inlet fittings and a wet joint to the manifold. Dry-joint systems use a riser that separates water injection from the manifold connection. The easiest confirmation is to check the MerCruiser parts diagram for your engine serial number and look for the elbow part number. If 807988A03 appears in the diagram, the center-rise system is installed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the gasket included?\u003c\/strong\u003e\u003cbr\u003eNo. The exhaust elbow gasket is sold separately. Order \u003ca href=\"\/products\/8131429007396\"\u003eExhaust Elbow Gasket 863726\u003c\/a\u003e alongside the elbow — a new gasket should always be installed when the elbow is removed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat supersedes 807988A2?\u003c\/strong\u003e\u003cbr\u003e807988A03 is the direct replacement for 807988A2. Always use 807988A03 when ordering; 807988A2 is no longer the current production number.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this elbow on a later MerCruiser with a dry-joint exhaust?\u003c\/strong\u003e\u003cbr\u003eNo. The center-rise wet-joint elbow and the later dry-joint riser\/elbow designs use different mating surfaces, gasket arrangements, and cooling-water routing. Installing the wrong type will result in leaks and potentially serious engine damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat aftermarket parts cross-reference to 807988A03?\u003c\/strong\u003e\u003cbr\u003eDocumented aftermarket equivalents include Sierra \u003cstrong\u003e18-1976-1\u003c\/strong\u003e and \u003cstrong\u003e18-1976-2\u003c\/strong\u003e, GLM \u003cstrong\u003e51140\u003c\/strong\u003e, Mallory \u003cstrong\u003e9-40559\u003c\/strong\u003e, Osco \u003cstrong\u003e4354\u003c\/strong\u003e, and Barr \u003cstrong\u003eMC-20-44354\u003c\/strong\u003e. Always verify the cross-reference against the OEM diagram for your specific engine before substituting.\u003c\/p\u003e\n\n\u003ch2\u003eSuperseded \/ Cross-Reference Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Mercury OEM:\u003c\/strong\u003e 807988A03\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperseded:\u003c\/strong\u003e 807988A2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSierra aftermarket:\u003c\/strong\u003e 18-1976-1, 18-1976-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGLM aftermarket:\u003c\/strong\u003e 51140\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMallory aftermarket:\u003c\/strong\u003e 9-40559\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOsco aftermarket:\u003c\/strong\u003e 4354\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarr aftermarket:\u003c\/strong\u003e MC-20-44354\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN \/ UPC:\u003c\/strong\u003e 745061289055\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Parts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/8131429007396\"\u003eMercury Quicksilver Exhaust Elbow Gasket 863726\u003c\/a\u003e — required; sold separately; order with elbow\u003c\/li\u003e\n\u003cli\u003eBrowse \u003ca href=\"\/collections\/mercruiser-marine-engine-parts\"\u003eMerCruiser Marine Engine Parts\u003c\/a\u003e for all exhaust system components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e 807988A03 is the correct replacement elbow for older GM-based MerCruiser V6 and V8 engines (typically through approximately 2002) using the center-rise wet-joint exhaust system. It is most commonly ordered during scheduled exhaust system inspection, after a failed pressure test, or when water backing up into the manifold or cylinders has been traced to a corroded or cracked elbow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon issues:\u003c\/strong\u003e The most important fitment check is confirming the engine uses the center-rise wet-joint exhaust system — not the later dry-joint design. These two systems are not interchangeable, and ordering by engine family alone without verifying the exhaust type is the most frequent cause of a return. The second common issue is ordering the elbow without the gasket (863726) and having to wait for a second delivery before the job can be completed. Order both together.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563879464996,"sku":"807988A03","price":507.8,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/images_0bb3084a-34c6-4b57-afdd-961f6db15f75.jpg?v=1789422163","url":"https:\/\/marisolmarine.com\/products\/merc-613","provider":"Marisol Marine Company","version":"1.0","type":"link"}