{"title":"Mercury 4-Stroke 190HP Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eFor Mercury 4-Stroke 190HP outboard engines, this page helps you find compatible parts and service information. Below youll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Mercury collection any time and use the Filter \u0026amp; Sort controls to narrow by horsepower, year range, and part category\/section. Scroll to the bottom of this page to start browsing parts for this engine.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0a5;border-radius:6px;text-decoration:none;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 190HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eFind the engines serial\/nameplate on the transom bracket or swivel bracket. Record the full serial number and any model code printed on the label.\u003c\/li\u003e\n    \u003cli\u003eInterpret model suffixes: shaft length (L = 20, XL = 25), control type (remote vs. tiller where applicable), and starting\/charging options.\u003c\/li\u003e\n    \u003cli\u003eConfirm it is a 4-stroke Mercury FourStroke family engine (oil filter present; EFI fuel system). Cowling graphics may indicate the family (e.g., FourStroke vs. Verado).\u003c\/li\u003e\n    \u003cli\u003eMatch propeller rotation and gear ratio details in your manual when selecting propellers or gearcase-related parts.\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\u003eMercury FourStroke V6 (1753225 HP class)\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;padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;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;border-bottom:1px solid #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eEFI 4-stroke V6 with DOHC valve train; remote or digital controls depending on rigging.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eFourStroke V6 family in the 1753225 HP range (your 190HP typically falls within this platform).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eStrong mid-range torque, good fuel economy, and broad parts availability for routine service.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eService items often interchange across the 175225 HP V6 range, but always confirm by serial number before ordering.\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\u003eIntervals below are general guidelines; always follow the factory service manual for your exact serial number and usage 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;padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;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;border-bottom:1px solid #eee;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eUse marine 4-stroke oil meeting manufacturer specs; replace the oil filter each service.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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;border-bottom:1px solid #eee;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eChange more often after heavy use or water intrusion; inspect for metal shavings.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eMercury Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eEvery 300 hours or 3 years\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect gap and replace sooner if misfire, hard starting, or rough idle occurs.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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;border-bottom:1px solid #eee;\"\u003eFuel filter \/ water-separating filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect at 100 hours; replace annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eHelps prevent lean conditions and hard starting; use ethanol-safe filters.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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;border-bottom:1px solid #eee;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eEvery 2 seasons or 200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eReplace annually in sandy, silty, or shallow environments.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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;border-bottom:1px solid #eee;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect often; replace when ~50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eChoose zinc, aluminum, or magnesium based on salt, brackish, or fresh water use.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:12px;color:#555;\"\u003e*Follow the service manual for exact intervals and procedures for your serial number.\u003c\/p\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: \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\u003eLower Unit \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\u003ePropellers: \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\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\/electrical-items\"\u003eElectrical Items\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  \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;padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;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;border-bottom:1px solid #eee;\"\u003eWeak telltale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect intake screens for blockage; verify impeller condition; confirm thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eWater pump repair kit, thermostat, intake screen\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eCheck fuel quality; replace fuel filter; inspect prop for damage or wrong pitch; verify spark plugs.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eFuel filter, spark plugs, propeller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eConfirm battery voltage and cable connections; inspect\/replace plugs; check for water in fuel.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eSpark plugs, fuel filter, fuel injectors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eVerify gear oil level\/condition; check for seal leaks at prop shaft and driveshaft.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eLower unit seal kit, bearings, gear oil\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 across different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome service items interchange within the Mercury FourStroke V6 family, but many components vary by year, serial number, and platform. Always verify compatibility using your engines serial\/nameplate.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, replace the impeller every 2 seasons or ~200 hours, and annually in sandy or silty conditions. Replace immediately if water flow is weak or overheating occurs.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange gear oil at least every 100 hours or once per year, and after any suspected impact or submersion. Inspect for water intrusion (milky oil) and metal particles.\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 engine serial number, horsepower, stroke type (4-stroke), shaft length (L\/XL), and any model code or cowling family name. Photos of the nameplate and the part being replaced are helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eReady to find parts for your Mercury 190HP? Browse the main Mercury collection by horsepower, year, and model to locate exact-fit components.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0a5;border-radius:6px;text-decoration:none;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;font-size:12px;color:#555;\"\u003eIf youre unsure about your model, send us a photo of the nameplate and the part you need and well help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"bellow-retainer-ring-installation-tool-fits-mercury-mercruiser-alpha-1-gen-2-bravo-blackhawk-replaces-91-818162","title":"Bellow Sleeve \/ Retainer Ring Installation Tool – for Mercury MerCruiser Alpha One Gen II and Bravo (Replaces OEM 91-818162)","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003ebellow sleeve and retainer ring installation tool\u003c\/strong\u003e is designed to install the aluminum sleeve or retainer ring in the U-joint or exhaust bellows of compatible Mercury MerCruiser sterndrives. Catalog references identify this application for \u003cstrong\u003eAlpha One Gen II and Bravo\u003c\/strong\u003e drive units.\u003c\/p\u003e\n\u003cp\u003eThe tool is listed as a replacement for Mercury Marine OEM tool number \u003cstrong\u003e91-818162\u003c\/strong\u003e. The corresponding Sierra reference is \u003cstrong\u003e18-9870\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls the aluminum sleeve or retainer ring in compatible sterndrive bellows.\u003c\/li\u003e\n\u003cli\u003eDesigned for Mercury MerCruiser Alpha One Gen II and Bravo applications.\u003c\/li\u003e\n\u003cli\u003eHelps apply even pressure around the ring during installation.\u003c\/li\u003e\n\u003cli\u003eUse with the appropriate driver rod or pressing equipment for the specific service procedure.\u003c\/li\u003e\n\u003c\/ul\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\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following references to compare this aftermarket tool with documented manufacturer and aftermarket catalog numbers. Part-number references do not replace confirmation of the drive-unit 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 or Source\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eReference Description\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine\u003c\/td\u003e\n        \u003ctd\u003e91-818162\u003c\/td\u003e\n        \u003ctd\u003eOEM reference for the bellow sleeve or retainer ring installation tool\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-9870\u003c\/td\u003e\n        \u003ctd\u003eSleeve installation tool replacement reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis is a sterndrive service tool rather than an engine-specific component. Confirm the drive-unit generation and the required sleeve or retainer-ring procedure before ordering.\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\u003c\/th\u003e\n        \u003cth\u003eDrive Series\u003c\/th\u003e\n        \u003cth\u003eApplication\u003c\/th\u003e\n        \u003cth\u003eOEM Reference\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\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003eAlpha One Gen II\u003c\/td\u003e\n        \u003ctd\u003eBellows sleeve or retainer ring installation\u003c\/td\u003e\n        \u003ctd\u003e91-818162\u003c\/td\u003e\n        \u003ctd\u003eDocumented catalog application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003eBravo\u003c\/td\u003e\n        \u003ctd\u003eBellows sleeve or retainer ring installation\u003c\/td\u003e\n        \u003ctd\u003e91-818162\u003c\/td\u003e\n        \u003ctd\u003eDocumented catalog application; confirm the exact Bravo service procedure\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eBellow sleeve and retainer ring installation tool\u003c\/dd\u003e\n  \u003cdt\u003ePrimary Application\u003c\/dt\u003e\n  \u003cdd\u003eInstalling the aluminum sleeve or retainer ring in compatible Mercury MerCruiser sterndrive bellows\u003c\/dd\u003e\n  \u003cdt\u003eCompatible Drive Series\u003c\/dt\u003e\n  \u003cdd\u003eMercury MerCruiser Alpha One Gen II and Bravo\u003c\/dd\u003e\n  \u003cdt\u003eOEM Reference\u003c\/dt\u003e\n  \u003cdd\u003eMercury Marine 91-818162\u003c\/dd\u003e\n  \u003cdt\u003eAftermarket Reference\u003c\/dt\u003e\n  \u003cdd\u003eSierra 18-9870\u003c\/dd\u003e\n  \u003cdt\u003eTool Function\u003c\/dt\u003e\n  \u003cdd\u003ePositions over the sleeve or ring and transfers installation pressure evenly during the service procedure\u003c\/dd\u003e\n  \u003cdt\u003eAdditional Equipment\u003c\/dt\u003e\n  \u003cdd\u003eA compatible driver rod or suitable pressing equipment may be required; follow the applicable service instructions\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Bellow sleeve and retainer ring installation tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e A driver rod, pressing tool, bellows, sleeve, and retainer ring are not included unless specifically listed with your order.\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eVerify that the sterndrive is supported safely and that the bellows service area is accessible.\u003c\/li\u003e\n\u003cli\u003eConfirm that the replacement bellows and the sleeve or retainer ring are correct for the drive-unit application.\u003c\/li\u003e\n\u003cli\u003eFit the bellows according to the applicable service procedure.\u003c\/li\u003e\n\u003cli\u003ePlace the aluminum sleeve or retainer ring in the correct position on the bellows.\u003c\/li\u003e\n\u003cli\u003ePosition the installation tool squarely over the sleeve or ring.\u003c\/li\u003e\n\u003cli\u003eUse a compatible driver rod or pressing arrangement to apply controlled, even pressure. Do not strike the tool in a way that could damage the bellows or ring.\u003c\/li\u003e\n\u003cli\u003eInspect the installed sleeve or ring to confirm that it is fully seated, even, and free of gaps or distortion.\u003c\/li\u003e\n\u003cli\u003eRemove the tool carefully and complete the remaining bellows installation steps according to the manufacturer’s service instructions.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhich sterndrives is this tool intended for?\u003c\/summary\u003e\u003cp\u003eCatalog references identify the tool for Mercury MerCruiser Alpha One Gen II and Bravo drive units. Confirm the exact drive generation and service procedure before use.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between a bellow sleeve and a retainer ring?\u003c\/summary\u003e\u003cp\u003eCatalogs may describe the same service tool as a sleeve installation tool or a bellow ring installation tool. The tool is used to install the applicable sleeve or retainer ring specified for the bellows and drive-unit application.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the OEM reference number included with the tool?\u003c\/summary\u003e\u003cp\u003eNo. Mercury Marine 91-818162 and Sierra 18-9870 are reference numbers used to identify the tool application. The product supplied is an aftermarket replacement tool.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the package include a driver rod or a bellows?\u003c\/summary\u003e\u003cp\u003eNo. This listing is for the installation tool only. A driver rod, pressing equipment, bellows, sleeve, and retainer ring are not included unless separately stated in the order details.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this tool be used on every Mercury or MerCruiser drive?\u003c\/summary\u003e\u003cp\u003eNo. The documented application is limited to the compatible Alpha One Gen II and Bravo sterndrive procedures. Do not infer compatibility from engine horsepower, model year, or brand alone.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM Mercury Marine tool?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement tool referenced against Mercury Marine OEM number 91-818162.\u003c\/p\u003e\u003c\/details\u003e\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify the drive-unit series, bellows design, and sleeve or retainer-ring procedure before purchase and installation.\u003c\/li\u003e\n\u003cli\u003eUse appropriate eye protection and support the sterndrive securely during service.\u003c\/li\u003e\n\u003cli\u003eApply pressure in a controlled manner and stop if the tool, ring, sleeve, or bellows is not aligned correctly.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended when the applicable service procedure or required equipment is unfamiliar.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMarine service tools selected for practical sterndrive maintenance and repair applications.\u003c\/li\u003e\n\u003cli\u003eClear aftermarket reference information to help compare tools with documented OEM and catalog numbers.\u003c\/li\u003e\n\u003cli\u003eProduct descriptions are written to distinguish included items from separately required service equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718265442619,"sku":"KO-P085-MZ0E","price":18.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/KO-P085-MZ0E.png?v=1762958513"}],"url":"https:\/\/seasierra.com\/collections\/mercury-4-stroke-190hp-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}