{"title":"MerCruiser 4-Stroke Outboard Engine Parts (115-170HP)","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003e\n    This page is for MerCruiser 4-Stroke Outboard engines in the 115–170HP range. Use it to find compatible parts and service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse our main MerCruiser collection. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the Filter \u0026amp; Sort controls to narrow results by horsepower, year range, and part category.\n  \u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#0d6efd; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All MerCruiser Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"margin-top:28px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 115–170HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate\/serial plate location: typically on the transom (clamp) bracket or swivel bracket. Record the full model designation and serial number.\u003c\/li\u003e\n    \u003cli\u003eReading the model code: note horsepower, EFI designation, shaft length (L\/XL), control type (tiller vs. remote), and gearcase option (standard vs. large\/Command Thrust-style).\u003c\/li\u003e\n    \u003cli\u003ePlatform differences: 115HP FourStroke models span earlier 1.7L EFI and later 2.1L EFI inline-4 designs, while higher outputs (135–175HP class) use larger inline-4 platforms. Some parts interchange, but service items can differ by platform.\u003c\/li\u003e\n    \u003cli\u003e4-Stroke identifiers: look for an engine oil dipstick, spin-on oil filter, and an EFI fuel system—these distinguish them from older 2-stroke models.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"margin-top:28px;\"\u003e\n  \u003ch2\u003eEngine Platform Overview\u003c\/h2\u003e\n  \u003ch3\u003eInline-4 EFI FourStroke (115HP class, 1.7L–2.1L)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInline-4 EFI 4-stroke; early 1.7L and later 2.1L variants.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e115 FourStroke EFI models (standard and large-gearcase options).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGood fuel economy, smooth operation, solid mid-range torque for fishing and family boats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eRoutine service items (filters, belts, impellers) are common; confirm platform when ordering to match fuel and cooling components.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3 style=\"margin-top:20px;\"\u003eInline-4 EFI FourStroke (135–175HP class, 3.0L–3.4L)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLarger-displacement inline-4 EFI 4-stroke platforms (commonly 3.0L–3.4L) covering mid-high outputs.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e135\/150\/175 FourStroke EFI models; options may include standard or larger gearcases that affect prop and cooling parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eStrong mid-range punch, efficient cruise, and broad propeller compatibility.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eMany wear items overlap with 115-class, but verify displacement and gearcase style when selecting water pump kits and props.\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=\"margin-top:28px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 4-stroke outboards; always follow the official service manual and your specific model’s maintenance schedule.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEvery 100 hours or annually (after initial break-in)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eUse marine 4-stroke oil; replace crush washers as required.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect for water intrusion and metal on the drain plug magnet; renew drain\/fill seals.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect 100 hours; replace ~300 hours or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck gap and condition; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eFuel filter (engine-mounted\/in-line)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEvery 100 hours or sooner in harsh\/ethanol environments\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eReplace more frequently if you notice surging or hesitation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEvery 2 seasons or ~200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCritical for cooling; replace sooner if stream is weak or you run sandy\/shallow water.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAnodes (zinc\/aluminum\/magnesium)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect every 50 hours; replace when ~50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eMatch alloy to your water type (salt, brackish, fresh).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\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:8px;\"\u003eAlternator\/drive belt (if equipped)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect 100 hours; replace ~300 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck tension and cracking; a slipping belt can cause charging issues.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\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=\"margin-top:28px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System: \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition\/Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase \u0026amp; Seals: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion: \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eAir \u0026amp; Intake: \u003ca href=\"https:\/\/seasierra.com\/collections\/air-filters\"\u003eAir Filters\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"margin-top:28px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eWeak telltale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect intake screens for debris; verify impeller age; check thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eWater pump kit, thermostat, intake screen\/grommets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck prop for damage\/cavitation; replace fuel filter; inspect plugs; verify throttle opening.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePropeller, fuel filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eConfirm fresh fuel; inspect plugs; check for restricted air intake; look for water in fuel.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eSpark plugs, fuel filter\/water-separating filter, air filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearcase noise or metal on drain plug\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck gear oil level\/condition; replace drain\/fill gaskets; pressure test for seal leaks.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seal kit, drain\/fill seals, gear oil\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLow charging output or belt squeal\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect alternator\/drive belt condition and tension; check battery terminals.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eDrive belt, alternator\/regulator, battery leads\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=\"margin-top:28px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome service items are shared, but cooling, fuel, and ignition components can differ between early and later 115HP platforms and larger 3.0L–3.4L models. Always verify by model code\/serial, displacement, and gearcase type.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs preventive maintenance, every 2 seasons or about 200 hours—sooner if you run sandy or shallow water or notice a weak telltale stream or rising temperatures.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange every 100 hours or annually. Inspect the old oil for water and metallic debris and renew drain\/fill gaskets at each service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full model designation and serial number, horsepower, shaft length, approximate year, and any gearcase option (standard vs. large\/Command Thrust). Photos of the nameplate and the part to be replaced also help.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"margin-top:28px; padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find the right parts fast? Browse the main MerCruiser collection by horsepower, year, and model to zero in on compatible components.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#0d6efd; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop MerCruiser Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#555;\"\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":"thermostat-fits-mercury-mercruiser-cummins-mercruiser-2-0l-diesel-engines-115-170-hp-replaces-879150054","title":"Thermostat for MerCruiser Stern Drive 2.0L Engines, 115–170 HP, 181°F (83°C) – Replaces 879150054","description":"\u003csection\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\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  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\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 replacement \u003cstrong\u003ethermostat\u003c\/strong\u003e is intended for MerCruiser stern-drive applications using 2.0L engines rated from 115 to 170 HP. It is specified for an operating temperature of \u003cstrong\u003e181°F (83°C)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe thermostat replaces or cross-references manufacturer part number \u003cstrong\u003e879150054\u003c\/strong\u003e. Confirm the application and part number against your engine and original thermostat before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplacement thermostat for MerCruiser stern-drive applications.\u003c\/li\u003e\n  \u003cli\u003eFor 2.0L engines rated 115–170 HP.\u003c\/li\u003e\n  \u003cli\u003e181°F (83°C) temperature specification.\u003c\/li\u003e\n  \u003cli\u003eSold as an individual thermostat, not a multi-part kit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following reference to compare the thermostat with the corresponding manufacturer number.\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\u003eReference Type\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\u003eMerCruiser manufacturer reference\u003c\/td\u003e\n        \u003ctd\u003e879150054\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\u003eThe company fitment information identifies this thermostat for \u003cstrong\u003eMerCruiser stern-drive 2.0L engines rated from 115 to 170 HP\u003c\/strong\u003e. The available information does not establish a complete model-year, serial-number, or individual engine-model list.\u003c\/p\u003e\n\u003cp\u003eAlways compare the original thermostat, manufacturer part number, engine configuration, and service-manual requirements before installation. Horsepower range alone may not confirm fitment for every engine variant.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand \/ Application\u003c\/th\u003e\n        \u003cth\u003eEngine Displacement\u003c\/th\u003e\n        \u003cth\u003eRated Horsepower\u003c\/th\u003e\n        \u003cth\u003eApplication Type\u003c\/th\u003e\n        \u003cth\u003eTemperature\u003c\/th\u003e\n        \u003cth\u003eReference Part No.\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e2.0L\u003c\/td\u003e\n        \u003ctd\u003e115–170 HP\u003c\/td\u003e\n        \u003ctd\u003eStern drive \/ outdrive\u003c\/td\u003e\n        \u003ctd\u003e181°F (83°C)\u003c\/td\u003e\n        \u003ctd\u003e879150054\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\u003eThermostat\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eMerCruiser stern drive \/ outdrive\u003c\/dd\u003e\n  \u003cdt\u003eEngine Displacement\u003c\/dt\u003e\n  \u003cdd\u003e2.0L\u003c\/dd\u003e\n  \u003cdt\u003eRated Horsepower\u003c\/dt\u003e\n  \u003cdd\u003e115–170 HP\u003c\/dd\u003e\n  \u003cdt\u003eTemperature Specification\u003c\/dt\u003e\n  \u003cdd\u003e181°F (83°C)\u003c\/dd\u003e\n  \u003cdt\u003eManufacturer Reference\u003c\/dt\u003e\n  \u003cdd\u003e879150054\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eThermostat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis listing is for the individual thermostat. A housing gasket, seal, fasteners, or other installation components are not identified as included.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eAllow the engine to cool completely before beginning work.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery and follow the safety procedures in the engine service manual.\u003c\/li\u003e\n  \u003cli\u003eLocate the thermostat housing and place a suitable container beneath the area before opening the cooling system.\u003c\/li\u003e\n  \u003cli\u003eDrain coolant as required to prevent spillage when the housing is opened.\u003c\/li\u003e\n  \u003cli\u003eRemove the housing cover carefully and note the orientation of the existing thermostat.\u003c\/li\u003e\n  \u003cli\u003eClean the mating surfaces and inspect the housing, sealing surfaces, and related components for damage or corrosion.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement thermostat in the orientation specified by the engine service manual.\u003c\/li\u003e\n  \u003cli\u003eReplace the housing gasket or seal if required; a gasket is not identified as included with this thermostat.\u003c\/li\u003e\n  \u003cli\u003eReinstall the housing and tighten fasteners to the manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eRefill and bleed the cooling system according to the service procedure, then run the engine and check operating temperature and coolant leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat engines is this thermostat intended for?\u003c\/summary\u003e\u003cp\u003eThe listed application is MerCruiser stern-drive or outdrive 2.0L engines rated from 115 to 170 HP. Confirm the exact engine model, serial range, and original part number before installation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat temperature is this thermostat?\u003c\/summary\u003e\u003cp\u003eThe specified temperature is 181°F (83°C).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat part number does this thermostat replace?\u003c\/summary\u003e\u003cp\u003eThis thermostat is listed as a replacement for manufacturer part number 879150054.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this a complete thermostat kit?\u003c\/summary\u003e\u003cp\u003eNo. The company product record identifies this product as an individual thermostat rather than a multi-part kit. A gasket, seal, housing, or other installation hardware is not identified as included.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow can I confirm fitment?\u003c\/summary\u003e\u003cp\u003eCompare the number on your original thermostat with 879150054 and verify the 2.0L, 115–170 HP stern-drive application. If the model-year or serial-number information differs, consult the engine service manual or a qualified marine technician.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are common signs of thermostat problems?\u003c\/summary\u003e\u003cp\u003ePossible symptoms include overheating, failure to reach normal operating temperature, unstable temperature readings, or cooling-system problems. Diagnose the complete cooling system before replacing the thermostat.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWork only on a completely cool engine and follow the manufacturer's service procedures.\u003c\/li\u003e\n  \u003cli\u003eVerify the engine model, serial range, displacement, horsepower, and manufacturer reference number before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not assume that a 2.0L engine or horsepower rating alone confirms fitment.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the cooling system or engine service procedure is unfamiliar.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Parts Support\u003c\/strong\u003e — We supply replacement components for marine service and repair applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product references and fitment information are provided to help customers compare parts before ordering.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomer Assistance\u003c\/strong\u003e — If you need help confirming an application, provide your engine model, serial information, and original part number.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718264525115,"sku":"22TH039","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Thermostat_for_Mercury_Mercruiser_Quicksilver_TowSports_20L_115-170_HP____879150054_-_JLM_MARINE-8291051.jpg?v=1762958475"},{"product_id":"air-filter-fits-mercruiser-cummins-2-0l-qsd-replaces-35-879172143-41132038f","title":"Air Filter for MerCruiser \/ Cummins 2.0L QSD Diesel Engines – Replaces Mercury 35-879172143","description":"\u003csection\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\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  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\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 replacement \u003cstrong\u003eair filter element\u003c\/strong\u003e is designed for Mercury Diesel and MerCruiser 2.0L QSD engine applications. It helps keep airborne dust and debris out of the engine air intake for clean airflow and dependable diesel-engine operation.\u003c\/p\u003e\n\u003cp\u003eThe filter is a direct replacement for Mercury Marine OEM part number \u003cstrong\u003e35-879172143\u003c\/strong\u003e. It is supplied as one individual air filter element, not as a multi-part service kit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplacement air filter element for Mercury Diesel 2.0L and 2.0L QSD applications.\u003c\/li\u003e\n  \u003cli\u003eDirect-replacement design for the original filter element.\u003c\/li\u003e\n  \u003cli\u003eSuitable for MerCruiser stern-drive and related marine diesel applications where the listed OEM number is specified.\u003c\/li\u003e\n  \u003cli\u003eConfirm the engine model and OEM reference before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following manufacturer reference to help confirm that this replacement is the correct filter for your application.\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        \u003cth\u003eReference Type\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine \/ MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e35-879172143\u003c\/td\u003e\n        \u003ctd\u003eOEM reference\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\u003eThe available application information identifies this filter for Mercury Diesel \/ CMD QSD 2.0 engines in the following power ratings. Always compare the engine identification label and the old filter reference before installation.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand \/ Family\u003c\/th\u003e\n        \u003cth\u003eEngine Model\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eEngine Type\u003c\/th\u003e\n        \u003cth\u003eOEM Reference\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser \/ CMD\u003c\/td\u003e\n        \u003ctd\u003eQSD 2.0 EI 115\u003c\/td\u003e\n        \u003ctd\u003e115\u003c\/td\u003e\n        \u003ctd\u003eDiesel\u003c\/td\u003e\n        \u003ctd\u003e35-879172143\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser \/ CMD\u003c\/td\u003e\n        \u003ctd\u003eQSD 2.0 EI 130\u003c\/td\u003e\n        \u003ctd\u003e130\u003c\/td\u003e\n        \u003ctd\u003eDiesel\u003c\/td\u003e\n        \u003ctd\u003e35-879172143\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser \/ CMD\u003c\/td\u003e\n        \u003ctd\u003eQSD 2.0 EI 150\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003eDiesel\u003c\/td\u003e\n        \u003ctd\u003e35-879172143\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser \/ CMD\u003c\/td\u003e\n        \u003ctd\u003eQSD 2.0 EI 170\u003c\/td\u003e\n        \u003ctd\u003e170\u003c\/td\u003e\n        \u003ctd\u003eDiesel\u003c\/td\u003e\n        \u003ctd\u003e35-879172143\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser \/ CMD\u003c\/td\u003e\n        \u003ctd\u003eQSD 2.0 ES 130\u003c\/td\u003e\n        \u003ctd\u003e130\u003c\/td\u003e\n        \u003ctd\u003eDiesel\u003c\/td\u003e\n        \u003ctd\u003e35-879172143\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser \/ CMD\u003c\/td\u003e\n        \u003ctd\u003eQSD 2.0 ES 150\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003eDiesel\u003c\/td\u003e\n        \u003ctd\u003e35-879172143\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser \/ CMD\u003c\/td\u003e\n        \u003ctd\u003eQSD 2.0 ES 170\u003c\/td\u003e\n        \u003ctd\u003e170\u003c\/td\u003e\n        \u003ctd\u003eDiesel\u003c\/td\u003e\n        \u003ctd\u003e35-879172143\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\u003eAir filter element\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eMercury Diesel 2.0L and 2.0L QSD marine diesel engines\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n  \u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eOEM Reference\u003c\/dt\u003e\n  \u003cdd\u003eMercury Marine \/ MerCruiser 35-879172143\u003c\/dd\u003e\n  \u003cdt\u003ePackage Type\u003c\/dt\u003e\n  \u003cdd\u003eSingle replacement filter element\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x replacement air filter element\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn the engine off and allow it to cool before servicing the air intake.\u003c\/li\u003e\n  \u003cli\u003eLocate the air filter housing and remove the retaining clips, fasteners, or cover as applicable to your engine.\u003c\/li\u003e\n  \u003cli\u003eRemove the old filter element and note its orientation before disposal.\u003c\/li\u003e\n  \u003cli\u003eClean loose dust and debris from inside the housing using a suitable clean, dry method. Do not allow debris to enter the intake passage.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement filter in the same orientation as the removed element.\u003c\/li\u003e\n  \u003cli\u003eCheck that the element is seated evenly and that the housing cover closes securely without pinching the filter.\u003c\/li\u003e\n  \u003cli\u003eReinstall all clips or fasteners, then inspect the intake connection before starting the engine.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eMaintenance \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm that this air filter fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eCompare your engine model with the QSD 2.0 applications listed above and verify that your existing filter or service information identifies Mercury OEM reference 35-879172143. If the model or reference does not match, confirm fitment with a qualified marine technician before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a restricted air filter?\u003c\/summary\u003e\n  \u003cp\u003ePossible signs include reduced engine performance, sluggish acceleration, increased exhaust smoke, or unusual intake restriction. Inspection and replacement should follow the engine manufacturer’s service recommendations and the operating conditions of the vessel.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should the filter be replaced?\u003c\/summary\u003e\n  \u003cp\u003eReplacement intervals vary with engine hours, dust exposure, salt-air conditions, and the manufacturer’s maintenance schedule. Inspect the filter regularly and replace it when it is dirty, damaged, damp, or otherwise unable to provide clean airflow.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan this filter be washed or reused?\u003c\/summary\u003e\n  \u003cp\u003eUnless the engine manufacturer specifically identifies the original element as washable and reusable, treat this replacement filter as a replaceable service element. Do not use solvents, compressed air, or cleaning methods that could damage the filter media or force debris into the intake.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM Mercury part?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for a replacement air filter element. Mercury OEM reference 35-879172143 is provided solely to help identify the application; the replacement is not represented as a genuine Mercury-branded component.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the engine model and OEM reference before purchase and installation.\u003c\/li\u003e\n  \u003cli\u003eDo not operate the engine with the air filter element or housing improperly installed.\u003c\/li\u003e\n  \u003cli\u003eKeep dirt and loose material from entering the engine intake during service.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the correct application or installation procedure is uncertain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — We supply replacement components for a range of marine engine and stern-drive applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product references and compatibility information are provided to help customers compare the correct service part.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePractical Service Support\u003c\/strong\u003e — Confirming the engine model and original part reference before ordering helps ensure the best possible fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718264557883,"sku":"23AF270","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23AF270_1.jpg?v=1762958477"}],"url":"https:\/\/seasierra.com\/collections\/mercruiser-4-stroke-outboard-engine-parts-115-170hp.oembed","provider":"SeaSierra","version":"1.0","type":"link"}