{"product_id":"volvo-penta-exhaust-check-valve-872438","title":"Volvo Penta Exhaust Check Valve 872438 | Sterndrive Lower Gear","description":"\u003ch2\u003eVolvo Penta Exhaust Check Valve 872438 — Sterndrive Lower Gear\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 872438 | 0872438\u003cbr\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Volvo Penta\u003cbr\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust check valve \/ non-return valve — OEM\u003cbr\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Sterndrive lower gear exhaust\u003cbr\u003e\n\u003cstrong\u003eDiagram Position:\u003c\/strong\u003e Reference item 6 in applicable lower gear assembly diagrams\u003cbr\u003e\n\u003cstrong\u003eRetained by:\u003c\/strong\u003e Attaching plate 872439, four blind rivets 977711\u003c\/p\u003e\n\n\u003cp\u003eThe Volvo Penta 872438 is a genuine OEM \u003cstrong\u003eexhaust check valve\u003c\/strong\u003e installed in the \u003cstrong\u003elower gear housing\u003c\/strong\u003e of selected Volvo Penta single-prop and DuoProp sterndrives. It functions as a one-way exhaust outlet valve, allowing exhaust discharge while limiting reverse water flow through the drive exhaust passage. This is a drive-mounted component — not an engine-mounted valve.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cp\u003eShown directly in lower gear parts diagrams for the following Volvo Penta sterndrive families — \u003cstrong\u003econfirm part 872438 in your drive-specific diagram before ordering:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDP-A\u003c\/li\u003e\n\u003cli\u003eDP-C\u003c\/li\u003e\n\u003cli\u003eDP-D\u003c\/li\u003e\n\u003cli\u003eDP-D1\u003c\/li\u003e\n\u003cli\u003eDP-E\u003c\/li\u003e\n\u003cli\u003eSP-A\u003c\/li\u003e\n\u003cli\u003eSP-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDiagram Position \u0026amp; Kit Components\u003c\/h3\u003e\n\u003cp\u003eOn applicable lower gear assemblies, 872438 is installed as diagram reference item 6 with the following companion parts:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e872438\u003c\/strong\u003e — Exhaust check valve (this part) — 1 required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e872439\u003c\/strong\u003e — Attaching plate — 1 required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e977711\u003c\/strong\u003e — Blind rivet — 4 required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen replacing the check valve, inspect and replace the attaching plate and rivets if corroded, deformed, or loose.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eValve flap is torn, distorted, or missing\u003c\/li\u003e\n\u003cli\u003eValve no longer closes against reverse flow\u003c\/li\u003e\n\u003cli\u003eExhaust deposits are preventing free movement of the flap\u003c\/li\u003e\n\u003cli\u003eRetaining area is damaged or rivets have loosened\u003c\/li\u003e\n\u003cli\u003eLower gear is being rebuilt and the original valve shows age or deterioration\u003c\/li\u003e\n\u003cli\u003eThe attaching plate (872439) is corroded or deformed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm part 872438 in the lower gear diagram for your exact drive model before installation\u003c\/li\u003e\n\u003cli\u003eInspect attaching plate 872439 for corrosion or deformation — replace if needed\u003c\/li\u003e\n\u003cli\u003eReplace all four 977711 blind rivets if any are damaged or loose\u003c\/li\u003e\n\u003cli\u003eEnsure the valve moves freely after installation and seats flat without being pinched\u003c\/li\u003e\n\u003cli\u003eInspect the exhaust outlet area for scale, corrosion, or debris before reassembly\u003c\/li\u003e\n\u003cli\u003eFollow the Volvo Penta service procedure for the exact drive model and serial number\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAlternate Part Number References\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e872438\u003c\/strong\u003e — Volvo Penta OEM part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0872438\u003c\/strong\u003e — Alternate Volvo Penta catalog format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eConfirm the current part number in the drive-specific Volvo Penta parts catalog before ordering — do not assume supersession without verification.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Parts \u0026amp; Service Items\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/volvo-penta-exhaust-bellows-3850426-sx-dp-s-dp-sm-oem\"\u003eVolvo Penta Exhaust Bellows 3850426 — SX DP-S DP-SM\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/volvo-penta-oem-spacer-sleeve-872355-transom-shield-steering-trim-sensor-assembly-dp-c1-dp-e\"\u003eVolvo Penta Spacer Sleeve 872355 — DP-C1 \/ DP-E Transom Shield\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003eThe key detail with 872438 is its location: this is the \u003cstrong\u003eexhaust non-return valve in the sterndrive lower gear housing\u003c\/strong\u003e, not an engine-mounted valve. It is retained by a separate attaching plate (872439) and four blind rivets (977711) — if the valve has failed due to loose rivets or a damaged plate, replace all three components together. When diagnosing exhaust backflow concerns on DP or SP drives, confirm the check valve is intact and moving freely before investigating other exhaust system components.\u003c\/p\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":43564052119588,"sku":"872438","price":57.3,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/7b78374c-0d61-4f33-8490-d8964097a015.png?v=1774474423","url":"https:\/\/marisolmarine.com\/products\/volvo-penta-exhaust-check-valve-872438","provider":"Marisol Marine Company","version":"1.0","type":"link"}