{"title":"MerCruiser 4-Stroke 120-225HP Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #eee; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page focuses on MerCruiser 4‑Stroke 120–225HP sterndrive engines and helps you find compatible parts and service information. Inside you’ll find maintenance tips, commonly replaced parts, and troubleshooting guidance. You can also browse the main MerCruiser collection. Scroll to the bottom of the 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\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block; padding:10px 14px; background:#0a5; 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\"\u003e\n  \u003ch2\u003eHow to Identify Your 120–225HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate serial numbers: the engine serial label is typically on a valve cover, flame arrestor bracket, or flywheel housing; the sterndrive (Alpha\/Bravo) serial is stamped on the drive or the gimbal housing.\u003c\/li\u003e\n    \u003cli\u003eMatch model details: note engine family (3.0L inline‑4 or 4.3L V6), fuel system (carbureted, TBI, or MPI), and drive family (Alpha One Gen I\/II or Bravo). These affect impellers, props, anodes, and ignition parts.\u003c\/li\u003e\n    \u003cli\u003eYear and emissions tags: the emissions\/date label helps confirm the production year and revision level. Always verify against both engine and drive serials for exact-fit parts.\u003c\/li\u003e\n    \u003cli\u003eProp and gear ratio ID: check the drive tag or documentation for gear ratio to choose the correct propeller pitch.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eInline‑4 Platform (3.0L, ~120–140 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 #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline‑4 4‑stroke 3.0L gasoline, typically carbureted\/TKS; paired most often with Alpha One drives.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eMerCruiser 120\/135\/140 3.0L with Alpha One Gen I\/II sterndrive.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eSimpler layout, good fuel economy, straightforward service, broad parts availability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eRaw‑water impeller resides in the lower unit for Alpha drives; many anodes and prop options are shared across years—confirm via serial.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eV6 Platform (4.3L, ~180–225 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 #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003e90° V6 4‑stroke 4.3L gasoline; carbureted, TBI, or MPI; typically with Alpha One, some installations with Bravo.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eMerCruiser 4.3L V6 (e.g., 190\/205\/220\/225 HP) with Alpha One or Bravo drive.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eStrong mid‑range torque, good holeshot for runabouts and cruisers, wide EFI support on later years.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eBravo installations often use an engine‑mounted seawater pump; impeller service differs from Alpha lower‑unit impellers—verify by drive family.\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\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for typical recreational use. Always follow the official MerCruiser service manual for your exact model and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; max-width:1000px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eWarm engine before draining; replace filter and inspect for fuel\/water contamination.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-oil-filters\"\u003eMerCruiser Oil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSterndrive gear lube\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eCheck for metal or milky oil (water intrusion). Replace gaskets on drain\/fill screws.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-service-maintenance-kits\"\u003eMercruiser Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd\u003eInspect at 100 hours; replace 100–200 hours\u003c\/td\u003e\n        \u003ctd\u003eVerify correct heat range and gap for 3.0L vs 4.3L; replace sooner if fouled.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark plug\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd\u003e50–100 hours or each season\u003c\/td\u003e\n        \u003ctd\u003eDrain water regularly; replace cartridge more often with ethanol fuel or contamination.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-fuel-filters\"\u003eMerCruiser Fuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eRaw‑water impeller \/ kit\u003c\/td\u003e\n        \u003ctd\u003eEvery 2 seasons or 200 hours\u003c\/td\u003e\n        \u003ctd\u003eAlpha: impeller in lower unit; Bravo: typically engine‑mounted seawater pump. Replace sooner after sand ingestion\/overheat.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-impellers\"\u003eMerCruiser Impellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAnodes (zinc\/aluminum\/magnesium)\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hours; replace at ~50% depletion\u003c\/td\u003e\n        \u003ctd\u003eMatch anode material to water type (salt\/brackish\/fresh) and protect all wetted metal.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-anodes\"\u003eMerCruiser Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSerpentine \/ alternator belt\u003c\/td\u003e\n        \u003ctd\u003eInspect every 100 hours; replace if worn\u003c\/td\u003e\n        \u003ctd\u003eLook for cracks, glazing, or squeal under load; re‑tension or replace as needed.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelt\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\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service \u0026amp; Maintenance – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-service-maintenance-kits\"\u003eMercruiser Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-impellers\"\u003eMerCruiser Impellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-fuel-filters\"\u003eMerCruiser Fuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-alternators\"\u003eMerCruiser Alternators\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-anodes\"\u003eMerCruiser Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-propellers\"\u003eMerCruiser Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGaskets \u0026amp; Seals – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-gaskets\"\u003eMerCruiser Gaskets\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; max-width:1000px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOverheat alarm or high temperature\u003c\/td\u003e\n        \u003ctd\u003eDebris on water intakes, worn impeller, sticking thermostat, collapsed hoses.\u003c\/td\u003e\n        \u003ctd\u003eWater pump impeller kit, thermostat, intake screens, raw‑water hoses, anodes.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration or low WOT RPM\u003c\/td\u003e\n        \u003ctd\u003eDamaged\/incorrect‑pitch prop, clogged fuel filter, old plugs, bottom fouling.\u003c\/td\u003e\n        \u003ctd\u003ePropeller, fuel filter, spark plugs, fuel pump, ignition components.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd\u003eFouled plugs, dirty flame arrestor, stale fuel, IAC\/TBI issues, vacuum leaks.\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, air filter (flame arrestor service), fuel filter, IAC valve, gaskets.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or metal in gear lube\u003c\/td\u003e\n        \u003ctd\u003eLow\/contaminated gear oil, leaking prop shaft seals, water intrusion.\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, gear lube, bearings, drain\/fill plug gaskets.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBattery not charging\u003c\/td\u003e\n        \u003ctd\u003eBelt tension, alternator output, corroded connections, blown fuses.\u003c\/td\u003e\n        \u003ctd\u003eAlternator, serpentine\/alternator belt, regulator\/rectifier, wiring.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome MerCruiser components interchange, but key items vary by engine family (3.0L vs 4.3L), fuel system (carb\/TBI\/MPI), and drive family (Alpha Gen I\/II vs Bravo). Always verify using both your engine and drive serial numbers.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, replace every 2 seasons or ~200 hours. Replace sooner after an overheat, sand ingestion, or if the boat has sat for extended periods (rubber takes a set).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should sterndrive gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eChange every 100 hours or annually. Inspect for metal or milkiness that indicates water intrusion, and replace the drain\/fill screw 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\u003ePlease provide the engine serial number, drive serial number, engine family (3.0L or 4.3L), drive family (Alpha or Bravo), and fuel system type (carb\/TBI\/MPI). Photos of the nameplate and the part to be replaced are very helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #eee;\"\u003e\n  \u003cp\u003eReady to find exact‑fit parts? Browse the main MerCruiser collection and filter by horsepower, year, and model to quickly narrow to compatible components.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block; padding:10px 14px; background:#0a5; 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":"water-temperature-sender-fits-mercury-mercruiser-omc-crusader-replaces-mercury-97258a1-97258-34625-fi6900152-fi6900198-sierra-18-5898-rldym-171960","title":"Water Temperature Sender for MerCruiser, OMC\/Volvo Penta, Indmar \u0026 Crusader Engines – 1\/2-14 NPT","description":"\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 { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis aftermarket \u003cstrong\u003eWater Temperature Sender\u003c\/strong\u003e is designed to provide a temperature signal to a compatible marine engine gauge. It is listed for MerCruiser stern-drive applications and for selected OMC\/Volvo Penta sterndrive, Indmar, and Crusader applications. The sender uses a 1\/2-14 NPT threaded fitting for installation where the original sender has the same thread and electrical configuration.\u003c\/p\u003e\n  \u003cp\u003eFor OMC\/Volvo Penta applications, the listed fitment covers 1968–1993 sterndrive engines with four-cylinder engines rated at 120–140 HP, V6 engines rated at 150–165 HP, and V8 GM engines rated at 170–225 HP. It is also listed for Indmar four-cylinder, V6, and V8 engines. Always compare the original sender, thread, connector, and manufacturer part number before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eReplacement water temperature sender for compatible marine engines.\u003c\/li\u003e\n    \u003cli\u003e1\/2-14 NPT threaded fitting.\u003c\/li\u003e\n    \u003cli\u003eSingle electrical terminal connection for the compatible gauge circuit.\u003c\/li\u003e\n    \u003cli\u003eDirect-replacement format when the original part and application match.\u003c\/li\u003e\n    \u003cli\u003eAftermarket replacement; not manufactured by Mercury, MerCruiser, OMC, Volvo Penta, Indmar, or Crusader.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThe following manufacturer and aftermarket references are listed for identification and cross-reference purposes. A number match should be confirmed against the complete engine application and original part.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand or Reference\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e97258A1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e97258\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e34625\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003eFI6900152\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003eFI6900198\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e171960\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC\/Volvo Penta\u003c\/td\u003e\n\u003ctd\u003e3852059\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC\/Volvo Penta\u003c\/td\u003e\n\u003ctd\u003e0171960\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC\/Volvo Penta\u003c\/td\u003e\n\u003ctd\u003e0509448\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC\/Volvo Penta\u003c\/td\u003e\n\u003ctd\u003e0778412\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eIndmar\u003c\/td\u003e\n\u003ctd\u003eS645001\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eIndmar\u003c\/td\u003e\n\u003ctd\u003e645001\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCrusader\u003c\/td\u003e\n\u003ctd\u003e700427\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra Marine aftermarket reference\u003c\/td\u003e\n\u003ctd\u003e18-5898\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOBR aftermarket reference\u003c\/td\u003e\n\u003ctd\u003eMR-584\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMallory Marine aftermarket reference\u003c\/td\u003e\n\u003ctd\u003e9-42401\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eFitment conditions must be kept together. Confirm the engine brand, drive type, model, year, horsepower, and original sender number before installation.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine Model Compatibility\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand or Application\u003c\/th\u003e\n\u003cth\u003eEngine or Drive Condition\u003c\/th\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Volvo Penta\u003c\/td\u003e\n\u003ctd\u003eSterndrive, 4-cylinder\u003c\/td\u003e\n\u003ctd\u003e1968–1993\u003c\/td\u003e\n\u003ctd\u003e120–140 HP\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e3852059, 0171960, 0509448, 0778412, 171960\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Volvo Penta\u003c\/td\u003e\n\u003ctd\u003eSterndrive, V6\u003c\/td\u003e\n\u003ctd\u003e1968–1993\u003c\/td\u003e\n\u003ctd\u003e150–165 HP\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e3852059, 0171960, 0509448, 0778412, 171960\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Volvo Penta\u003c\/td\u003e\n\u003ctd\u003eSterndrive, V8 GM\u003c\/td\u003e\n\u003ctd\u003e1968–1993\u003c\/td\u003e\n\u003ctd\u003e170–225 HP\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e3852059, 0171960, 0509448, 0778412, 171960\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eIndmar\u003c\/td\u003e\n\u003ctd\u003e4-cylinder, V6, or V8\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eS645001, 645001\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003eStern-drive \/ out-drive applications listed for this sender family\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e97258A1, 97258, 34625, FI6900152, FI6900198\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCrusader\u003c\/td\u003e\n\u003ctd\u003eApplication associated with the listed temperature sender reference\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e700427\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eWater temperature sender\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n    \u003cdd\u003eMarine engine coolant or water temperature gauge circuit\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eThreaded replacement installation when the original application matches\u003c\/dd\u003e\n    \u003cdt\u003eThread Size\u003c\/dt\u003e\n    \u003cdd\u003e1\/2-14 NPT\u003c\/dd\u003e\n    \u003cdt\u003eElectrical Connection\u003c\/dt\u003e\n    \u003cdd\u003eSingle-terminal sender connection\u003c\/dd\u003e\n    \u003cdt\u003eProduct Status\u003c\/dt\u003e\n    \u003cdd\u003eAftermarket replacement; not an OEM component\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\u003cli\u003e1 x Water Temperature Sender\u003c\/li\u003e\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eAllow the engine to cool completely and disconnect the negative battery cable.\u003c\/li\u003e\n    \u003cli\u003eLocate the existing water temperature sender on the engine, thermostat housing, or specified sender port.\u003c\/li\u003e\n    \u003cli\u003ePlace an appropriate container beneath the sender location if coolant or water may drain during removal.\u003c\/li\u003e\n    \u003cli\u003eDisconnect the electrical lead from the original sender.\u003c\/li\u003e\n    \u003cli\u003eRemove the original sender using the correct wrench. Avoid damaging the surrounding housing or threads.\u003c\/li\u003e\n    \u003cli\u003eCompare the replacement sender's thread, terminal, and physical configuration with the original part.\u003c\/li\u003e\n    \u003cli\u003eApply a suitable marine-rated thread sealant if required by the engine manufacturer's instructions. Keep sealant away from the electrical terminal.\u003c\/li\u003e\n    \u003cli\u003eInstall the new sender by hand to prevent cross-threading, then tighten it to the manufacturer's specified torque. Do not overtighten.\u003c\/li\u003e\n    \u003cli\u003eReconnect the electrical lead and the negative battery cable.\u003c\/li\u003e\n    \u003cli\u003eRestore the coolant or water level as required by the engine manufacturer's service procedure.\u003c\/li\u003e\n    \u003cli\u003eRun the engine carefully, check for leaks, and verify that the gauge responds normally.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if the temperature sender is failing?\u003c\/summary\u003e\n    \u003cp\u003eCommon symptoms include an inoperative gauge, an unusually high or low reading, or an unstable reading. Before replacing the sender, inspect the wiring, terminal, gauge, engine ground, and cooling system. Test the sender according to the engine or gauge manufacturer's procedure.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the difference between a temperature sender and a temperature switch?\u003c\/summary\u003e\n    \u003cp\u003eA temperature sender supplies a temperature signal to a gauge, while a temperature switch generally opens or closes an electrical circuit at a specified threshold for an alarm or warning circuit. Confirm which device your engine requires before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy is the gauge reading incorrectly after installation?\u003c\/summary\u003e\n    \u003cp\u003eCheck that the sender matches the gauge system, that the terminal is clean and secure, and that the engine has a good electrical ground. A sender and gauge with incompatible resistance characteristics can produce an inaccurate reading even when the thread fits.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan this sender be used for oil temperature?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is for a water temperature sender. Do not use it for oil temperature unless the engine or gauge manufacturer specifically confirms that the sender's calibration and application are suitable.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this sender require calibration?\u003c\/summary\u003e\n    \u003cp\u003eNo separate calibration is normally required when the sender is correctly matched to the engine and gauge system. Verify operation after installation and follow the engine manufacturer's testing procedure if the reading is abnormal.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement sender. The listed manufacturer and aftermarket numbers are provided only as application and identification references.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the complete engine application and original sender number before purchase.\u003c\/li\u003e\n    \u003cli\u003eDo not rely on a thread-size match alone; connector type, calibration, and engine application must also match.\u003c\/li\u003e\n    \u003cli\u003eWork only on a cool engine and follow the engine manufacturer's service instructions.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when access is difficult or the cooling system must be opened.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — We supply aftermarket components for common marine repair and maintenance applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Information\u003c\/strong\u003e — Product references and fitment conditions are provided to help customers compare the original part before ordering.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSupport for Correct Selection\u003c\/strong\u003e — Confirm the engine model, year, drive type, and original part number when application details vary.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718266818875,"sku":"19MC009","price":15.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Boat_Engine_Water_Temp_Sender_Temperature_Sensor_for_Mercury_Mercruiser_97258A1_-_JLM_MARINE-8290836.jpg?v=1762958566"}],"url":"https:\/\/seasierra.com\/collections\/mercruiser-4-stroke-120-225hp-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}