{"title":"MerCruiser Exhaust Water Shutters","description":"\u003cp\u003eThe engine does not have to be removed to replace the newer style shutters. The engine usually has to be remove to replace these shutters. ense against exhaust backflow. Newer y-pipes have the shutters located at the top of the pipe.\u003c\/p\u003e\n\u003cp\u003eThese can be replaced by removing the cast iron exhaust elbow or sometimes sliding down the 1st rubber bellows. These connectors and shutters are exposed to endless heat cycling and saltwater abuse that can speed up the corrosion process and cause failure. A couple of years ago I had to replace my motor after water rushed in through the exhaust. The shutters can start making a \"clakity\" noise. Mechanic friend of mine thinks the water shutters in the exhaust on my 04 Merc 5.0L (carbureted) are shot as theres a rattle in the pipes. Many exhaust installations include shutters to prevent water from traveling back up the exhaust and into manifold. You will only have to remove the exhaust elbow from the manifold. Water shutters are located inside of the engine exhaust system pipes, just before the exhaust gas passes thru the transom. Bad shutters will only make noise at or just above idle. PartsVu has engineered these water shutters to match the OEM shutters on many MerCruiser installations and protect water from traveling back into the engine from the exhaust. Some shutters fit down below in the pipe, just before the gases are leaving the boat. When shutters get old they can make noise. If you have an older engine you might have the old 3-piece exhaust y-pipe. The Exhaust Water Shutters are located in the exhaust y-pipe. Many times, when the outdrive is removed or the drive is separated for a water pump replacement, you will find a pieces of these laying around. Without these shutters, lake water can be sucked backwards into the engine when the engine is hot and is being shut down. Other shutters are located up above, where the exhaust gas just leaves the engine. I would recommend replacing the water shutter. The sound is often diagnosed as a bad lifter, connecting rod, gimbal bearing or a bad drive. Eventually a bad shutter can break loose and get stuck down in the exhaust pipe or in the drives exhaust passage. They should be replaced to protect the engine. The shutters help prevent water from running back into the engine under certain circumstances. To replace the shutters in the old 3-piece style t-pipe the engine will have to be removed.\u003c\/p\u003e\n\u003cp\u003eMercury Marine MerCruiser exhaust water shutters from PartsVu contain all necessary parts to replace your boat's exhaust water shutters.\u003c\/p\u003e\n\u003cstyle\u003e\u003c!--\n#readMoreTxt {display: none;} #readMoreTxt a {color: #000000;} #readMoreTxt a:visited {color: #000000;} #readMoreBtnContainer a {color: #000000;} #readMoreBtnContainer a:visited {color: #000000;}\n--\u003e\u003c\/style\u003e","products":[{"product_id":"mercury-mercruiser-water-shutter-2-48-inch-diameter-807166a1","title":"Mercury – Quicksilver Water Shutter | For Select MerCruiser Sterndrive Engines | 807166A1","description":"\u003cp data-start=\"0\" data-end=\"95\"\u003e\u003cstrong data-start=\"0\" data-end=\"93\"\u003eMercury – Quicksilver Water Shutter | For Select MerCruiser Sterndrive Engines | 807166A1\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"97\" data-end=\"100\"\u003e\n\u003ch3 data-start=\"102\" data-end=\"120\"\u003e\u003cstrong data-start=\"106\" data-end=\"118\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"121\" data-end=\"699\"\u003eA small part with a big job, the \u003cstrong data-start=\"154\" data-end=\"207\"\u003eMercury Marine 807166A1 Quicksilver Water Shutter\u003c\/strong\u003e helps keep water where it belongs — out of your engine. Designed for \u003cstrong data-start=\"277\" data-end=\"329\"\u003eselect MerCruiser sterndrive and inboard engines\u003c\/strong\u003e, this shutter sits inside the exhaust system and acts like a one-way valve. When your engine is running, it allows exhaust gases to flow freely. When it’s idling, off, or facing rough water, it swings shut to prevent backflow from following seas or wakes that could flood your cylinders. It’s a simple, reliable safeguard that protects your engine from costly damage.\u003c\/p\u003e\n\u003chr data-start=\"701\" data-end=\"704\"\u003e\n\u003ch3 data-start=\"706\" data-end=\"728\"\u003e\u003cstrong data-start=\"710\" data-end=\"726\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"731\" data-end=\"837\"\u003e\n\u003cstrong data-start=\"731\" data-end=\"743\"\u003ePurpose:\u003c\/strong\u003e Prevents water from backing up into the exhaust and engine when the motor is off or idling.\u003c\/li\u003e\n\u003cli data-start=\"840\" data-end=\"935\"\u003e\n\u003cstrong data-start=\"840\" data-end=\"851\"\u003eDesign:\u003c\/strong\u003e Acts as a flexible check valve for exhaust systems in \u003cstrong data-start=\"906\" data-end=\"932\"\u003eMerCruiser sterndrives\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"938\" data-end=\"1006\"\u003e\n\u003cstrong data-start=\"938\" data-end=\"947\"\u003eSize:\u003c\/strong\u003e Features a \u003cstrong data-start=\"959\" data-end=\"1003\"\u003e2.48-inch diameter cross pin (hinge pin)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1009\" data-end=\"1120\"\u003e\n\u003cstrong data-start=\"1009\" data-end=\"1026\"\u003eConstruction:\u003c\/strong\u003e Built from \u003cstrong data-start=\"1038\" data-end=\"1075\"\u003edurable, heat-resistant materials\u003c\/strong\u003e that withstand exhaust heat and vibration.\u003c\/li\u003e\n\u003cli data-start=\"1123\" data-end=\"1198\"\u003e\n\u003cstrong data-start=\"1123\" data-end=\"1135\"\u003eFitment:\u003c\/strong\u003e Direct OEM replacement for consistent, reliable performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1200\" data-end=\"1203\"\u003e\n\u003ch3 data-start=\"1205\" data-end=\"1242\"\u003e\u003cstrong data-start=\"1209\" data-end=\"1240\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1245\" data-end=\"1358\"\u003e\n\u003cstrong data-start=\"1245\" data-end=\"1297\"\u003eSelect MerCruiser sterndrive and inboard engines\u003c\/strong\u003e (see owner’s manual or service manual for fitment details)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1360\" data-end=\"1363\"\u003e\n\u003ch3 data-start=\"1365\" data-end=\"1408\"\u003e\u003cstrong data-start=\"1369\" data-end=\"1406\"\u003ePerformance \u0026amp; Real-World Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1409\" data-end=\"1778\"\u003eThe \u003cstrong data-start=\"1413\" data-end=\"1439\"\u003e807166A1 water shutter\u003c\/strong\u003e does one thing but does it exceptionally well — it protects your engine from backwash. If water ever gets pushed up through the exhaust system, it can flow into the cylinders, causing hydrolock or internal rust damage. This small shutter swings into action when your engine slows down or shuts off, blocking that reverse flow instantly.\u003c\/p\u003e\n\u003cp data-start=\"1780\" data-end=\"2045\"\u003eMade from marine-grade materials that resist exhaust heat and saltwater exposure, it’s built to handle years of use. When it’s working properly, you won’t even notice it — but your engine will thank you every time you head back down the wake or face choppy water.\u003c\/p\u003e\n\u003chr data-start=\"2047\" data-end=\"2050\"\u003e\n\u003ch3 data-start=\"2052\" data-end=\"2084\"\u003e\u003cstrong data-start=\"2056\" data-end=\"2082\"\u003eWhy Choose Mercury OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2085\" data-end=\"2373\"\u003eThe \u003cstrong data-start=\"2089\" data-end=\"2113\"\u003eQuicksilver 807166A1\u003c\/strong\u003e is a \u003cstrong data-start=\"2119\" data-end=\"2150\"\u003egenuine Mercury Marine part\u003c\/strong\u003e, designed and tested for the exact flow rates, temperatures, and angles of MerCruiser exhaust systems. Aftermarket shutters may not seal correctly or could degrade quickly from heat exposure, putting your engine at risk.\u003c\/p\u003e\n\u003cp data-start=\"2375\" data-end=\"2627\"\u003eMercury’s OEM components are built to the same standards used in factory-installed parts — ensuring precise fit, reliable sealing, and long-lasting durability. It’s the level of protection that only the people who built your engine can truly deliver.\u003c\/p\u003e\n\u003chr data-start=\"2629\" data-end=\"2632\"\u003e\n\u003ch3 data-start=\"2634\" data-end=\"2647\"\u003e\u003cstrong data-start=\"2638\" data-end=\"2645\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2649\" data-end=\"2786\"\u003e\u003cstrong data-start=\"2649\" data-end=\"2686\"\u003eQ1: What does a water shutter do?\u003c\/strong\u003e\u003cbr data-start=\"2686\" data-end=\"2689\"\u003eIt prevents water from flowing backward through the exhaust into the engine when idling or off.\u003c\/p\u003e\n\u003cp data-start=\"2788\" data-end=\"2882\"\u003e\u003cstrong data-start=\"2788\" data-end=\"2820\"\u003eQ2: What’s the shutter size?\u003c\/strong\u003e\u003cbr data-start=\"2820\" data-end=\"2823\"\u003eIt measures \u003cstrong data-start=\"2835\" data-end=\"2879\"\u003e2.48 inches in diameter at the hinge pin\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2884\" data-end=\"3025\"\u003e\u003cstrong data-start=\"2884\" data-end=\"2917\"\u003eQ3: What engines does it fit?\u003c\/strong\u003e\u003cbr data-start=\"2917\" data-end=\"2920\"\u003eIt’s designed for \u003cstrong data-start=\"2938\" data-end=\"2990\"\u003eselect MerCruiser sterndrive and inboard engines\u003c\/strong\u003e — check your manual for details.\u003c\/p\u003e\n\u003cp data-start=\"3027\" data-end=\"3176\"\u003e\u003cstrong data-start=\"3027\" data-end=\"3060\"\u003eQ4: When should I replace it?\u003c\/strong\u003e\u003cbr data-start=\"3060\" data-end=\"3063\"\u003eReplace it if it’s \u003cstrong data-start=\"3082\" data-end=\"3132\"\u003ecracked, warped, or no longer sealing properly\u003c\/strong\u003e — typically during major exhaust service.\u003c\/p\u003e\n\u003cp data-start=\"3178\" data-end=\"3372\"\u003e\u003cstrong data-start=\"3178\" data-end=\"3217\"\u003eQ5: Why OEM instead of aftermarket?\u003c\/strong\u003e\u003cbr data-start=\"3217\" data-end=\"3220\"\u003eBecause \u003cstrong data-start=\"3228\" data-end=\"3252\"\u003eMercury OEM shutters\u003c\/strong\u003e are built to precise tolerances and materials that resist exhaust heat and saltwater, ensuring long-term reliability.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626582434083,"sku":"807166A1","price":86.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/807166a1.jpg?v=1761571270"},{"product_id":"mercury-mercruiser-water-shutter-fits-older-mcm-applications-99370a2","title":"Mercury Mercruiser - Water Shutter - Fits Older MCM Applications - 99370A2","description":"\u003cp\u003eWARNING: Cancer - www.P65Warnings.ca.gov\u003c\/p\u003e \u003cp\u003eFits older MCM applications\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46933430993187,"sku":"99370A2","price":32.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/99370a2.png?v=1698784103"},{"product_id":"mercury-mercruiser-water-shutter-2-50-inch-diameter-807166a3","title":"Mercury – Quicksilver Water Shutter | For Select MerCruiser Sterndrive Engines | 807166A3","description":"\u003cp data-start=\"0\" data-end=\"95\"\u003e\u003cstrong data-start=\"0\" data-end=\"93\"\u003eMercury – Quicksilver Water Shutter | For Select MerCruiser Sterndrive Engines | 807166A3\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"97\" data-end=\"100\"\u003e\n\u003ch3 data-start=\"102\" data-end=\"120\"\u003e\u003cstrong data-start=\"106\" data-end=\"118\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"121\" data-end=\"697\"\u003eWhen the water gets rough, your engine needs protection from the backflow that can sneak up the exhaust system. The \u003cstrong data-start=\"237\" data-end=\"290\"\u003eMercury Marine 807166A3 Quicksilver Water Shutter\u003c\/strong\u003e—sometimes called a water flapper—does exactly that. Designed for \u003cstrong data-start=\"356\" data-end=\"397\"\u003evarious MerCruiser sterndrive engines\u003c\/strong\u003e, this simple but vital part closes automatically when the engine is shut off or idling to stop water from washing back into the cylinders. It’s durable, reliable, and built to handle years of exposure to exhaust heat and saltwater — a quiet safeguard that keeps your motor safe and running strong.\u003c\/p\u003e\n\u003chr data-start=\"699\" data-end=\"702\"\u003e\n\u003ch3 data-start=\"704\" data-end=\"726\"\u003e\u003cstrong data-start=\"708\" data-end=\"724\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"729\" data-end=\"823\"\u003e\n\u003cstrong data-start=\"729\" data-end=\"741\"\u003ePurpose:\u003c\/strong\u003e Prevents water from backing up into the exhaust system when idling or shut off.\u003c\/li\u003e\n\u003cli data-start=\"826\" data-end=\"930\"\u003e\n\u003cstrong data-start=\"826\" data-end=\"837\"\u003eDesign:\u003c\/strong\u003e Functions as a \u003cstrong data-start=\"853\" data-end=\"877\"\u003eflexible check valve\u003c\/strong\u003e — opens for exhaust flow, closes against backwash.\u003c\/li\u003e\n\u003cli data-start=\"933\" data-end=\"1026\"\u003e\n\u003cstrong data-start=\"933\" data-end=\"941\"\u003eFit:\u003c\/strong\u003e \u003cstrong data-start=\"942\" data-end=\"980\"\u003e2.5-inch diameter at the hinge pin\u003c\/strong\u003e; installs inline within the exhaust system.\u003c\/li\u003e\n\u003cli data-start=\"1029\" data-end=\"1123\"\u003e\n\u003cstrong data-start=\"1029\" data-end=\"1044\"\u003eDurability:\u003c\/strong\u003e Made from \u003cstrong data-start=\"1055\" data-end=\"1098\"\u003eheat- and corrosion-resistant materials\u003c\/strong\u003e for long service life.\u003c\/li\u003e\n\u003cli data-start=\"1126\" data-end=\"1212\"\u003e\n\u003cstrong data-start=\"1126\" data-end=\"1140\"\u003ePlacement:\u003c\/strong\u003e Mounts downstream of the flexible union between the elbow and Y-pipe.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1214\" data-end=\"1217\"\u003e\n\u003ch3 data-start=\"1219\" data-end=\"1256\"\u003e\u003cstrong data-start=\"1223\" data-end=\"1254\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1259\" data-end=\"1366\"\u003eFits \u003cstrong data-start=\"1264\" data-end=\"1311\"\u003evarious MerCruiser sterndrive installations\u003c\/strong\u003e (check owner’s or service manual for exact fitment).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1368\" data-end=\"1371\"\u003e\n\u003ch3 data-start=\"1373\" data-end=\"1416\"\u003e\u003cstrong data-start=\"1377\" data-end=\"1414\"\u003ePerformance \u0026amp; Real-World Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1417\" data-end=\"1721\"\u003eThe \u003cstrong data-start=\"1421\" data-end=\"1447\"\u003e807166A3 water shutter\u003c\/strong\u003e quietly protects your MerCruiser engine every time you shut it down. When the boat is stopped or reversing in waves, this flapper closes to stop seawater from being forced back up the exhaust system — protecting the engine from corrosion, internal rust, or hydro-locking.\u003c\/p\u003e\n\u003cp data-start=\"1723\" data-end=\"2046\"\u003eMade from high-strength materials, this shutter is built to handle the punishing mix of heat, moisture, and vibration that comes with marine exhaust systems. It installs quickly, fits snugly, and once it’s in place, you won’t have to think about it — just enjoy the confidence that comes with knowing your engine is safe.\u003c\/p\u003e\n\u003chr data-start=\"2048\" data-end=\"2051\"\u003e\n\u003ch3 data-start=\"2053\" data-end=\"2085\"\u003e\u003cstrong data-start=\"2057\" data-end=\"2083\"\u003eWhy Choose Mercury OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2086\" data-end=\"2370\"\u003eThe \u003cstrong data-start=\"2090\" data-end=\"2114\"\u003eQuicksilver 807166A3\u003c\/strong\u003e is a \u003cstrong data-start=\"2120\" data-end=\"2151\"\u003egenuine Mercury Marine part\u003c\/strong\u003e, engineered for precision fit and lasting reliability. Generic replacements can use cheaper plastics or rubber that harden, crack, or warp from exhaust heat, which can cause early failure and potential engine damage.\u003c\/p\u003e\n\u003cp data-start=\"2372\" data-end=\"2615\"\u003eMercury’s OEM design is built to handle real-world marine conditions, providing consistent performance and protection over time. It’s the same part Mercury installs on new sterndrives — tested, proven, and trusted by professionals worldwide.\u003c\/p\u003e\n\u003chr data-start=\"2617\" data-end=\"2620\"\u003e\n\u003ch3 data-start=\"2622\" data-end=\"2635\"\u003e\u003cstrong data-start=\"2626\" data-end=\"2633\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2637\" data-end=\"2805\"\u003e\u003cstrong data-start=\"2637\" data-end=\"2674\"\u003eQ1: What does a water shutter do?\u003c\/strong\u003e\u003cbr data-start=\"2674\" data-end=\"2677\"\u003eIt prevents water from flowing backward through the exhaust system into the engine during idling, reversing, or when shut off.\u003c\/p\u003e\n\u003cp data-start=\"2807\" data-end=\"2916\"\u003e\u003cstrong data-start=\"2807\" data-end=\"2847\"\u003eQ2: What’s the size of this shutter?\u003c\/strong\u003e\u003cbr data-start=\"2847\" data-end=\"2850\"\u003eIt measures \u003cstrong data-start=\"2862\" data-end=\"2888\"\u003e2.5 inches in diameter\u003c\/strong\u003e at the cross pin (hinge).\u003c\/p\u003e\n\u003cp data-start=\"2918\" data-end=\"3046\"\u003e\u003cstrong data-start=\"2918\" data-end=\"2948\"\u003eQ3: Where is it installed?\u003c\/strong\u003e\u003cbr data-start=\"2948\" data-end=\"2951\"\u003eInside the exhaust system, downstream of the flexible union between the \u003cstrong data-start=\"3023\" data-end=\"3043\"\u003eelbow and Y-pipe\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"3048\" data-end=\"3177\"\u003e\u003cstrong data-start=\"3048\" data-end=\"3081\"\u003eQ4: When should I replace it?\u003c\/strong\u003e\u003cbr data-start=\"3081\" data-end=\"3084\"\u003eReplace it if it’s \u003cstrong data-start=\"3103\" data-end=\"3133\"\u003ecracked, stiff, or missing\u003c\/strong\u003e, or during exhaust maintenance intervals.\u003c\/p\u003e\n\u003cp data-start=\"3179\" data-end=\"3401\"\u003e\u003cstrong data-start=\"3179\" data-end=\"3218\"\u003eQ5: Why OEM instead of aftermarket?\u003c\/strong\u003e\u003cbr data-start=\"3218\" data-end=\"3221\"\u003eBecause \u003cstrong data-start=\"3229\" data-end=\"3253\"\u003eMercury OEM shutters\u003c\/strong\u003e are made from high-temp, corrosion-resistant materials that hold up under the real stresses of boating — ensuring long-lasting engine protection.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936191533347,"sku":"807166A3","price":100.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/807166a3_04-1.jpg?v=1761571361"},{"product_id":"mercury-mercruiser-water-shutter-2-98-inch-diameter-807166a2","title":"Mercury – Quicksilver Exhaust Water Shutter Kit | For Select MerCruiser Sterndrive Engines | 807166A2","description":"\u003cp data-start=\"0\" data-end=\"107\"\u003e\u003cstrong data-start=\"0\" data-end=\"105\"\u003eMercury – Quicksilver Exhaust Water Shutter Kit | For Select MerCruiser Sterndrive Engines | 807166A2\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"109\" data-end=\"112\"\u003e\n\u003ch3 data-start=\"114\" data-end=\"132\"\u003e\u003cstrong data-start=\"118\" data-end=\"130\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"133\" data-end=\"670\"\u003eWhen your boat’s sitting still or idling in rough water, the last thing you want is seawater creeping back into your engine. The \u003cstrong data-start=\"262\" data-end=\"327\"\u003eMercury Marine 807166A2 Quicksilver Exhaust Water Shutter Kit\u003c\/strong\u003e stops that from happening. Designed for \u003cstrong data-start=\"368\" data-end=\"446\"\u003eMerCruiser sterndrives with Y-pipes measuring 2.98 inches at the cross pin\u003c\/strong\u003e, this kit acts as a one-way valve — letting exhaust exit freely while blocking water from coming back in. It’s a small part that plays a big role in keeping your engine protected and ready for another season on the water.\u003c\/p\u003e\n\u003chr data-start=\"672\" data-end=\"675\"\u003e\n\u003ch3 data-start=\"677\" data-end=\"699\"\u003e\u003cstrong data-start=\"681\" data-end=\"697\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"702\" data-end=\"796\"\u003e\n\u003cstrong data-start=\"702\" data-end=\"714\"\u003ePurpose:\u003c\/strong\u003e Prevents water from backing up into the exhaust system and reaching the engine.\u003c\/li\u003e\n\u003cli data-start=\"799\" data-end=\"897\"\u003e\n\u003cstrong data-start=\"799\" data-end=\"810\"\u003eDesign:\u003c\/strong\u003e Built for \u003cstrong data-start=\"821\" data-end=\"854\"\u003eMerCruiser sterndrive Y-pipes\u003c\/strong\u003e with a \u003cstrong data-start=\"862\" data-end=\"894\"\u003e2.98-inch cross pin diameter\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"900\" data-end=\"996\"\u003e\n\u003cstrong data-start=\"900\" data-end=\"916\"\u003ePerformance:\u003c\/strong\u003e Functions as a check valve — opens for exhaust flow, closes against backwash.\u003c\/li\u003e\n\u003cli data-start=\"999\" data-end=\"1097\"\u003e\n\u003cstrong data-start=\"999\" data-end=\"1014\"\u003eDurability:\u003c\/strong\u003e Made from \u003cstrong data-start=\"1025\" data-end=\"1063\"\u003eheat- and salt-resistant materials\u003c\/strong\u003e that handle high exhaust temps.\u003c\/li\u003e\n\u003cli data-start=\"1100\" data-end=\"1163\"\u003e\n\u003cstrong data-start=\"1100\" data-end=\"1116\"\u003eEase of Use:\u003c\/strong\u003e Simple to install using standard hand tools.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1165\" data-end=\"1168\"\u003e\n\u003ch3 data-start=\"1170\" data-end=\"1207\"\u003e\u003cstrong data-start=\"1174\" data-end=\"1205\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1210\" data-end=\"1245\"\u003e\u003cstrong data-start=\"1210\" data-end=\"1243\"\u003eMerCruiser sterndrive engines\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1248\" data-end=\"1342\"\u003eY-pipes with \u003cstrong data-start=\"1261\" data-end=\"1300\"\u003e2.98-inch diameter at the hinge pin\u003c\/strong\u003e (check your service manual for fitment)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1344\" data-end=\"1347\"\u003e\n\u003ch3 data-start=\"1349\" data-end=\"1392\"\u003e\u003cstrong data-start=\"1353\" data-end=\"1390\"\u003ePerformance \u0026amp; Real-World Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1393\" data-end=\"1759\"\u003eThe \u003cstrong data-start=\"1397\" data-end=\"1431\"\u003e807166A2 exhaust water shutter\u003c\/strong\u003e is one of those unseen components that quietly does critical work. When your boat slows down, stops, or gets hit by following seas, this shutter closes automatically, preventing backwash from entering the exhaust and damaging your engine. Without it, water can flood into the cylinders, causing rust, hydro-locking, or worse.\u003c\/p\u003e\n\u003cp data-start=\"1761\" data-end=\"2035\"\u003eBuilt with heavy-duty materials that resist heat, corrosion, and vibration, this OEM shutter stands up to years of service. It installs easily and provides peace of mind every time you head out — because you’ll know your engine’s protected, even when the water gets rough.\u003c\/p\u003e\n\u003chr data-start=\"2037\" data-end=\"2040\"\u003e\n\u003ch3 data-start=\"2042\" data-end=\"2074\"\u003e\u003cstrong data-start=\"2046\" data-end=\"2072\"\u003eWhy Choose Mercury OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2075\" data-end=\"2329\"\u003eThe \u003cstrong data-start=\"2079\" data-end=\"2103\"\u003eQuicksilver 807166A2\u003c\/strong\u003e is a \u003cstrong data-start=\"2109\" data-end=\"2140\"\u003egenuine Mercury Marine part\u003c\/strong\u003e, designed specifically for MerCruiser exhaust systems. Aftermarket versions can have poor tolerances or materials that degrade quickly in heat and saltwater, leading to leaks or failure.\u003c\/p\u003e\n\u003cp data-start=\"2331\" data-end=\"2552\"\u003eMercury OEM shutters are built and tested under real marine conditions, ensuring reliable performance and perfect fit. It’s the same part Mercury uses on new sterndrives — trusted by technicians and boat builders alike.\u003c\/p\u003e\n\u003chr data-start=\"2554\" data-end=\"2557\"\u003e\n\u003ch3 data-start=\"2559\" data-end=\"2572\"\u003e\u003cstrong data-start=\"2563\" data-end=\"2570\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2574\" data-end=\"2705\"\u003e\u003cstrong data-start=\"2574\" data-end=\"2604\"\u003eQ1: What does this kit do?\u003c\/strong\u003e\u003cbr data-start=\"2604\" data-end=\"2607\"\u003eIt prevents water from flowing back through the exhaust into the engine when idling or shut off.\u003c\/p\u003e\n\u003cp data-start=\"2707\" data-end=\"2825\"\u003e\u003cstrong data-start=\"2707\" data-end=\"2739\"\u003eQ2: What drives does it fit?\u003c\/strong\u003e\u003cbr data-start=\"2739\" data-end=\"2742\"\u003eIt fits \u003cstrong data-start=\"2750\" data-end=\"2776\"\u003eMerCruiser sterndrives\u003c\/strong\u003e with \u003cstrong data-start=\"2782\" data-end=\"2822\"\u003e2.98-inch Y-pipe cross pin diameters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2827\" data-end=\"2956\"\u003e\u003cstrong data-start=\"2827\" data-end=\"2862\"\u003eQ3: When should it be replaced?\u003c\/strong\u003e\u003cbr data-start=\"2862\" data-end=\"2865\"\u003eReplace it if it’s \u003cstrong data-start=\"2884\" data-end=\"2915\"\u003ecracked, warped, or missing\u003c\/strong\u003e — or during major exhaust maintenance.\u003c\/p\u003e\n\u003cp data-start=\"2958\" data-end=\"3069\"\u003e\u003cstrong data-start=\"2958\" data-end=\"2990\"\u003eQ4: Can I install it myself?\u003c\/strong\u003e\u003cbr data-start=\"2990\" data-end=\"2993\"\u003eYes — it’s a \u003cstrong data-start=\"3006\" data-end=\"3038\"\u003estraightforward installation\u003c\/strong\u003e that only needs basic tools.\u003c\/p\u003e\n\u003cp data-start=\"3071\" data-end=\"3213\"\u003e\u003cstrong data-start=\"3071\" data-end=\"3099\"\u003eQ5: Why use Mercury OEM?\u003c\/strong\u003e\u003cbr data-start=\"3099\" data-end=\"3102\"\u003eBecause \u003cstrong data-start=\"3110\" data-end=\"3131\"\u003eMercury OEM parts\u003c\/strong\u003e are made for exact fit and long-term reliability under real boating conditions.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936191566115,"sku":"807166A2","price":85.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/807166A2_main.jpg?v=1760631225"}],"url":"https:\/\/partsvu.com\/en-ca\/collections\/mercruiser-exhaust-water-shutters.oembed","provider":"PartsVu","version":"1.0","type":"link"}