{"title":"MerCruiser 7.4L 454 CID MAG. GEN. V V-8 Sterndrive — 1998 \u0026 Up · 0D805069 THRU 0F304999 · EXHAUST SYSTEM(7.4L BRAVO)","description":"\u003cdiv class=\"model-catalog\"\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/mercruiser-7-4l-454-cid-mag-gen-v-v-8-sterndrive\"\u003eBack to MerCruiser 7.4L 454 CID MAG. GEN. V V-8 Sterndrive\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the application and restrictions below with your engine or drive before ordering.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eCatalog reference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/807166a1-4-inch-exhaust-water-shutter-for-mercruiser-v6-v8-1998-up\"\u003e807166A1 4-Inch Exhaust Water Shutter for MerCruiser V6 \u0026amp; V8 (1998-Up)\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eYear: 1998 \u0026amp; Up; Serial: 0D805069 THRU 0F304999; Required configuration: V6 or V8 with two-piece exhaust manifolds; excludes V6 engines originally fitted with one-piece manifolds.\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"catalog-reference\"\u003eCatalog parts list · Ref. 7\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/807166a1-exhaust-water-shutter-set-2-pcs-for-mercruiser-v6-v8\"\u003e807166A1 Exhaust Water Shutter Set, 2 Pcs for MerCruiser V6 \u0026amp; V8\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eYear: 1998 \u0026amp; Up; Serial: 0D805069 THRU 0F304999; Required configuration: V6 or V8 with two-piece exhaust manifolds; excludes V6 engines originally fitted with one-piece manifolds.\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"catalog-reference\"\u003eCatalog parts list · Ref. 7\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","products":[{"product_id":"807166a1-exhaust-water-shutter-set-2-pcs-for-mercruiser-v6-v8","title":"807166A1 Exhaust Water Shutter Set, 2 Pcs for MerCruiser V6 \u0026 V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n  \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n    \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n    \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Water Shutter Set, 2 Pieces for MerCruiser V6 \u0026amp; V8 (1998-Up)\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece exhaust water shutter flapper valve set is built for MerCruiser Stern \/ Out Drive V6 and V8 engines from 1998 onward, where each individual shutter corresponds to OEM reference 807166A1. It will not work on V6 engines that originally came with one-piece exhaust manifolds.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eCheck whether the engine is a 1998-or-later V6 or V8 application, and on V6 engines verify the original exhaust manifold design before selecting this set.\u003c\/p\u003e\n    \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n      \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n        \u003cstrong\u003eMerCruiser Stern \/ Out Drive V8 Engines\u003c\/strong\u003e — Model years: 1998-Up.\n        \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits as listed\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n        \u003cstrong\u003eMerCruiser Stern \/ Out Drive V6 Engines\u003c\/strong\u003e — Model years: 1998-Up. Excludes V6 engines that originally came with one-piece exhaust manifolds.\n        \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified: Not for V6 engines with original one-piece manifolds\u003c\/span\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3 style=\"margin:18px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n    \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n      \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n        \u003cstrong\u003eMerCruiser Stern \/ Out Drive V6 Engines with One-Piece Manifolds\u003c\/strong\u003e — Will not work on V6 engines that originally came with one-piece manifolds.\n        \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eThese numbers are provided for part identification only and do not by themselves establish direct interchangeability across every configuration or indicate manufacturer identity. Compare the individual shutter reference against OEM 807166A1 rather than relying only on a similar-looking number.\u003c\/p\u003e\n    \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eIndividual Shutter OEM Reference\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMercury Mariner: 807166A1\u003cbr\u003eMercury Mariner \/ Quicksilver: 807166a 1\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eTwo-Piece Set Reference Notation\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e807166A1*2 (denotes two 807166A1 water shutters; no separate single OEM package number is assigned to the two-piece set)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional OEM \/ Quicksilver Numbers\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMercury Mariner: 807166A2\u003cbr\u003eQuicksilver: 807166A2\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Reference Numbers\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM: 89175\u003cbr\u003eEMP: 32-08306\u003cbr\u003eOBR Red Rhino: MR-507\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n    \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust Water Shutter (each individual shutter corresponds to OEM reference 807166A1)\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n    \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eShut off the engine, allow all exhaust components to cool completely, and disconnect the starting circuit to prevent accidental cranking during service.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eVerify the exhaust manifold setup before disassembly; do not install this set on a V6 engine that originally came with one-piece manifolds.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eInspect the exhaust passage and mounting area for debris or remnants of damaged shutter components before installing the new water shutters.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eSeat the shutters according to the factory service manual for your specific MerCruiser exhaust layout and check that the flappers move freely without binding.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eIf any abnormal exhaust noise, restriction, or leakage is observed after reassembly, stop engine operation immediately and inspect the exhaust assembly.\u003c\/li\u003e\n    \u003c\/ol\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n    \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n    \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n      \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this set be used on a 1998-or-later MerCruiser V6 engine?\u003c\/h3\u003e\n      \u003cp style=\"margin:0;\"\u003eIt can be used on 1998-and-later MerCruiser V6 engines except those that originally came with one-piece exhaust manifolds. V6 engines with original one-piece manifolds are excluded.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n      \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow many exhaust water shutters are included in this listing?\u003c\/h3\u003e\n      \u003cp style=\"margin:0;\"\u003eThis package includes 2 exhaust water shutter components, with each individual shutter corresponding to OEM reference 807166A1.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165059735603,"sku":"17ST003","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-50be2a4e858a53d6.jpg?v=1792733669"},{"product_id":"807166a1-4-inch-exhaust-water-shutter-for-mercruiser-v6-v8-1998-up","title":"807166A1 4-Inch Exhaust Water Shutter for MerCruiser V6 \u0026 V8 (1998-Up)","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n  \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n    \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n    \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003e4-Inch Exhaust Water Shutter for MerCruiser V6 \u0026amp; V8 (1998-Up)\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust water shutter (flapper valve) is referenced to Mercury 807166A1 and is listed as a 4-inch version for MerCruiser Stern \/ Out Drive V6 and V8 exhaust applications from 1998 onward. It is not suitable for V6 engines that originally came with one-piece manifolds, and it is distinct from the separate 3-inch 99370A2 \/ GLM 89160 version.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n    \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eComponent Type\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust water shutter \/ flapper valve\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eListed Size\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e4-inch water shutter (for the 807166A1 \/ GLM 89175 reference; separate from the 3-inch 99370A2 \/ GLM 89160 version)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eManifold Exclusion\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWill not work on V6 engines that came with one-piece manifolds\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eFor replacing the exhaust water shutter in compatible MerCruiser V6 and V8 stern \/ out drive exhaust systems from 1998 onward. Match the required part number (including the suffix) and verify your manifold style and shutter diameter rather than selecting by appearance alone.\u003c\/p\u003e\n    \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n      \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n        \u003cstrong\u003eMerCruiser Stern \/ Out Drive V6 engines\u003c\/strong\u003e — Years: 1998-Up. Configuration: 4-inch exhaust water shutter application; excludes V6 engines originally supplied with one-piece manifolds.\n        \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n        \u003cstrong\u003eMerCruiser Stern \/ Out Drive V8 engines\u003c\/strong\u003e — Years: 1998-Up. Configuration: 4-inch exhaust water shutter application.\n        \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3 style=\"margin:18px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n    \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n      \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n        \u003cstrong\u003eMerCruiser V6 engines with one-piece manifolds\u003c\/strong\u003e — Will not work on V6 engines that originally came with one-piece manifolds.\n        \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n        \u003cstrong\u003e3-inch water shutter applications (99370A2 \/ GLM 89160)\u003c\/strong\u003e — Those numbers refer to a separate 3-inch version and are not interchangeable with the 4-inch 807166A1 \/ GLM 89175 configuration.\n        \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eThese public part numbers are provided for identification and cross-reference only; they do not indicate manufacturer identity or guarantee interchangeability across different suffix or size configurations.\u003c\/p\u003e\n    \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary OEM \u0026amp; 4-Inch References\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMercury \/ Mercury Mariner: 807166A1\u003cbr\u003eQuicksilver: 807166a 1\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket References (4-Inch)\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM: 89175\u003cbr\u003eOBR Red Rhino: MR-507\u003cbr\u003eEMP: 32-08306\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Listed OEM Suffix References\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMercury Mariner: 807166A2\u003cbr\u003eMercruiser Stern \/ Out Drive: 807166A2\u003cbr\u003eQuicksilver: 807166A2\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDifferent Configuration Comparison (3-Inch Version — Not This Part)\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e99370A2\u003cbr\u003eGLM: 89160\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n    \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n      Check the complete part number, including the A1 suffix. The 807166A1 \/ GLM 89175 reference is listed as a 4-inch water shutter, whereas 99370A2 \/ GLM 89160 is a separate 3-inch version.\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n    \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eExhaust Water Shutter\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n    \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eShut off the engine, allow all exhaust components to cool completely, and disconnect the battery to prevent accidental starting during service.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eInspect the exhaust passage when removing the old water shutter and clear away any loose flapper fragments or hardware that may have dropped into the exhaust path.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eVerify that the replacement shutter matches the required 4-inch configuration and moves freely on its pivot points without binding against the exhaust housing.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, monitor the exhaust system during initial operation; shut the engine down and inspect immediately if abnormal exhaust noise or leakage occurs.\u003c\/li\u003e\n    \u003c\/ol\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n    \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n      \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does 807166A1 (GLM 89175) differ from 99370A2 (GLM 89160)?\u003c\/h3\u003e\n      \u003cp style=\"margin:0 0 14px;\"\u003eThe 807166A1 \/ GLM 89175 reference is listed as a 4-inch water shutter, while 99370A2 \/ GLM 89160 is a separate 3-inch version. Because the shutter styles look similar in photos, selection must be based on the complete part number (including the suffix) and the required size.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n      \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWill this water shutter fit a 1998-Up MerCruiser V6 with one-piece exhaust manifolds?\u003c\/h3\u003e\n      \u003cp style=\"margin:0 0 14px;\"\u003eNo. Although this shutter is listed for 1998-Up MerCruiser V6 and V8 applications, V6 engines that originally came with one-piece manifolds are excluded.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171572441139,"sku":"17ST002","price":14.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-7043a6dfb4bf4374.png?v=1792750069"}],"url":"https:\/\/serdamarine.com\/collections\/mercruiser-7-4l-454-cid-mag-gen-v-v-8-sterndrive-1998-up-0d805069-thru-0f304999-exhaust-system-7-4l-bravo.oembed","provider":"我的商店","version":"1.0","type":"link"}