{"title":"Yanmar 177HP 4-Stroke Marine Engine | Powerful \u0026 Reliable","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp style=\"max-width:900px;\"\u003e\n    This page is for Yanmar 4‑Stroke 177HP marine engines and helps you quickly find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Yanmar collection for a wider selection of service components and hardware. Scroll down to the bottom of the page to start browsing parts for this engine, and remember that on the collection page you can use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category.\n    \u003cbr\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\" style=\"display:inline-block;margin-top:10px;padding:10px 14px;border:1px solid #0a6;border-radius:6px;text-decoration:none;\"\u003eBrowse All Yanmar Parts\u003c\/a\u003e\n  \u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 177HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the engine identification plate: typically on the starboard side of the cylinder block or on the engine top cover; a secondary label may be on the ECU. If a transmission or sterndrive is fitted, its plate will be on the unit itself.\u003c\/li\u003e\n    \u003cli\u003eRead the full model code and serial number. For example, many 177HP models are designated as 4BY180; suffixes can indicate drive type (shaft\/sterndrive) or package details.\u003c\/li\u003e\n    \u003cli\u003eConfirm key specs: 4‑cylinder, turbocharged, common‑rail diesel. This differentiates BY‑series engines from older mechanically injected platforms.\u003c\/li\u003e\n    \u003cli\u003eRecord any additional build data (emissions tier, gear ratio, or kit\/package codes) to ensure exact parts compatibility.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003eBY‑Series 2.0L Inline‑4 Turbo Diesel (Approx. 177 HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInline‑4, turbocharged, common‑rail 4‑stroke diesel around 2.0 liters; peak output approximately 177 HP near 4000 RPM.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eYanmar 4BY180 packages in shaft‑drive or sterndrive configurations.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCompact footprint, efficient common‑rail fuel delivery, strong mid‑range torque, quiet operation.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eMatch parts to model code, serial range, and drive type. Exhaust elbow, turbo, and raw‑water pump components can vary by package and year.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp style=\"max-width:900px;\"\u003eIntervals below are general guidelines; always follow the official Yanmar service manual for your exact model and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eUse marine‑grade diesel oil and replace the filter at each oil change.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-oil-filters\"\u003eYanmar Oil filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFuel filter(s)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e100 hours or sooner if contaminated\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace primary and secondary elements; drain water separators regularly.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-fuel-filters\"\u003eYanmar Fuel filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAir filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e200 hours or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect more often in dusty or salt‑laden environments.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-air-filters\"\u003eYanmar Air filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eRaw‑water pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e200 hours or every 2 seasons\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace sooner if overheat alarms or weak discharge are noted.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater pumps\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAnodes (engine\/exhaust\/drive)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect 50–100 hours; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCritical for corrosion protection in salt\/brackish water.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eGear oil (sterndrive) or transmission fluid (shaft‑drive)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFollow the drive\/transmission manufacturer’s specification.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\"\u003eYanmar\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCoolant (closed‑circuit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 2 years\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eUse the specified long‑life coolant and maintain proper mix.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\"\u003eYanmar\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAnnual service kit (where available)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eYearly\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eConvenient bundle for filters, seals, and common wear items.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-service-maintenance-kits\"\u003eYanmar Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service Kits – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-service-maintenance-kits\"\u003eYanmar Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-fuel-filters\"\u003eYanmar Fuel filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eLubrication – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-oil-filters\"\u003eYanmar Oil filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eAir Intake – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-air-filters\"\u003eYanmar Air filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eExhaust Components – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-elbows\"\u003eYanmar Elbows\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eTurbo \u0026amp; Charge‑Air – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-turbos\"\u003eYanmar Turbos\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eHigh temperature alarm \/ weak discharge\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect sea strainer, intake for debris, raw‑water impeller, and belt tension; verify thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eRaw‑water pump kit, thermostat, intake screen, anodes, cooling hoses\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCheck battery voltage, bleed air from fuel system, replace clogged fuel filters; verify glow plug and sensor operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFuel filters, glow plugs, injectors, crank\/temperature sensors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003ePoor acceleration \/ black smoke\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect air filter, turbo hoses\/clamps for leaks, and exhaust elbow for restriction; confirm boost pressure.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAir filter, turbocharger, charge‑air hoses, exhaust elbow\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eWater‑in‑fuel warning \/ intermittent power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eDrain separator bowl, replace filters, check for contaminated fuel; inspect lift pump performance.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFuel filters, water separator components, injectors\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or packages?\u003c\/summary\u003e\n    \u003cp\u003eSome service items are common across BY‑series engines, but many components (exhaust elbows, raw‑water pumps, sensors, and turbo hardware) differ by model code, serial range, and drive package. Always confirm against your exact identification plate.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the raw‑water impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, every 200 hours or every 2 seasons—whichever comes first. Replace sooner if you see reduced cooling flow, an overheat alarm, or impeller vane damage during inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eFor sterndrive packages, change gear oil about every 100 hours or annually. For shaft‑drive installations, follow the transmission manufacturer’s fluid and interval specification in the service manual.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide the full model code (e.g., 4BY180), engine serial number, drive type (shaft or sterndrive), and clear photos of the nameplate and the part being replaced.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px 0;\"\u003e\n  \u003cp style=\"max-width:900px;\"\u003eReady to find parts? Browse the main Yanmar collection by horsepower, model, and category to dial in the exact components for your engine.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\" style=\"display:inline-block;margin-top:6px;padding:10px 14px;border:1px solid #0a6;border-radius:6px;text-decoration:none;\"\u003eShop Yanmar Parts\u003c\/a\u003e\u003c\/p\u003e\n  \u003cp style=\"font-size:0.95em;color:#444;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"stainless-steel-exhaust-mixing-elbow-fits-yanmar-4lh-series-marine-engines-replaces-119171-13490","title":"Stainless Steel Exhaust Mixing Elbow – Fits Yanmar 4LH Series Marine Engines (Replaces 119171-13490)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-quality \u003cstrong\u003eStainless Steel Exhaust Mixing Elbow\u003c\/strong\u003e is engineered for Yanmar 4LH Series marine diesel engines, including the 4LH-TE, 4LH-HTE, 4LH-HTZ, and 4LH-HTZAY models. It serves as a crucial component for mixing exhaust gases with cooling water before discharge.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct replacement for Yanmar 119171-13490 and HDI Marine 3B3.5.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEngineered for a direct bolt-on installation.\u003c\/li\u003e\n  \u003cli\u003eConstructed from precision CNC machined, investment-cast 316 stainless steel for superior durability.\u003c\/li\u003e\n  \u003cli\u003eIncludes the required gasket for a complete installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e119171-13490\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHDI Marine\u003c\/td\u003e\n        \u003ctd\u003e3B3.5\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e4LH-TE\u003c\/td\u003e\n        \u003ctd\u003e125\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e119171-13490\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e4LH-HTE\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e119171-13490\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e4LH-HTZ\u003c\/td\u003e\n        \u003ctd\u003e158\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e119171-13490\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e4LH-HTZAY\u003c\/td\u003e\n        \u003ctd\u003e177\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e119171-13490\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eExhaust Mixing Elbow\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect bolt-on replacement\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003e3-1\/2\" (89mm) discharge diameter\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003e316 Stainless Steel\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eSilver\/Metallic\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e23.0\" × 16.0\" × 12.0\"\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e3kg (6.5 lbs)\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eBolt-on with gasket\u003c\/dd\u003e\n  \u003cdt\u003eThread Size\u003c\/dt\u003e\n\u003cdd\u003e1-1\/4\" (32mm) water inlet\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003ePrecision CNC machined investment cast stainless steel\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Stainless Steel Exhaust Mixing Elbow (119171-13490)\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e1 × Gasket (119171-13510)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is completely cool and disconnect the battery for safety.\u003c\/li\u003e\n  \u003cli\u003eClose the raw water seacock and drain the cooling system as required.\u003c\/li\u003e\n  \u003cli\u003eCarefully disconnect the raw water inlet hose and the main wet exhaust hose from the old elbow.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the old elbow. Take care not to damage the exhaust manifold's mounting surface.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the manifold surface to remove all old gasket material and carbon deposits.\u003c\/li\u003e\n  \u003cli\u003ePosition the new gasket and install the new stainless steel exhaust elbow, ensuring a proper fit.\u003c\/li\u003e\n  \u003cli\u003eTighten the mounting bolts to the manufacturer's recommended torque specifications in a cross pattern.\u003c\/li\u003e\n  \u003cli\u003eReconnect the raw water and exhaust hoses and secure all clamps firmly.\u003c\/li\u003e\n  \u003cli\u003eOpen the seacock, reconnect the battery, start the engine, and carefully inspect for any water or exhaust leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I know if this elbow fits my Yanmar engine?\u003c\/summary\u003e\u003cp\u003eThis elbow is a direct replacement for Yanmar part number 119171-13490, specifically designed for the 4LH series engines including the 4LH-TE, 4LH-HTE, 4LH-HTZ, and 4LH-HTZAY models. Always check your engine's manual or existing part number to confirm fitment before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the main difference between this stainless steel elbow and the OEM cast iron version?\u003c\/summary\u003e\u003cp\u003eThe primary advantage is material. This elbow is made from 316 stainless steel, offering significantly better corrosion resistance and a longer service life compared to the original cast iron part, which is prone to internal rust and scaling that can restrict exhaust and water flow.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should an exhaust elbow be inspected or replaced?\u003c\/summary\u003e\u003cp\u003eExhaust elbows are critical wear items. We recommend inspecting them annually for signs of corrosion, carbon buildup, or water leaks. Replacement intervals vary based on usage (salt vs. fresh water, engine hours), but it's common to replace them every 5-7 years as preventative maintenance to avoid catastrophic failure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are common signs that my exhaust elbow is failing?\u003c\/summary\u003e\u003cp\u003eCommon symptoms include engine overheating at high RPMs, reduced engine power, excessive steam or white smoke from the exhaust, external rust stains or water drips on the elbow's housing, and evidence of water leaking into the engine bay or back into the engine.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. The part is manufactured in an ISO 9002 facility and batch-inspected for quality and consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the shipping speed and cost?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free to most locations; expedited options, where available, will be presented at checkout.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\u003cp\u003eThis part is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our full policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50647221829947,"sku":"MAR119171-13490INOX","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/MAR119171-13490INOX_9c10fcd0-8091-4f54-b443-38616805436d.jpg?v=1760020023"}],"url":"https:\/\/seasierra.com\/collections\/yanmar-177hp-4-stroke-marine-engine-powerful-reliable.oembed","provider":"SeaSierra","version":"1.0","type":"link"}