{"product_id":"87-805605a1-oil-pressure-sender-sensor-switch-for-mercruiser-jlm-marine","title":"87-805605A1 Oil Pressure Sender Sensor Switch for Mercruiser | JLM Marine","description":"\u003ch2\u003eOil Pressure Sender Sensor Switch 87-805605A1 – Fits MerCruiser 4.3L, 5.0L, 5.7L Engines\u003c\/h2\u003e\n\n\u003cp\u003eThis oil pressure sender sensor switch is designed to fit MerCruiser marine engines, specifically models equipped with 4.3L, 5.0L, and 5.7L powerplants. It monitors low oil pressure conditions and triggers the alarm system to protect your engine from damage. Engineered as a direct aftermarket replacement for OEM part number 87-805605A1, this sensor ensures reliable performance and engine safety.\u003c\/p\u003e\n\n\u003cp\u003eThis switch directly replaces MerCruiser part #87-805605A1, Sierra part #OP22900, Crusader part #97767, and Marine Power part #457045, providing broad cross-brand compatibility for your marine engine needs.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSenses low oil pressure (6 PSI) and shuts off electric fuel pump to prevent engine damage\u003c\/li\u003e\n  \u003cli\u003eTerminal type: 10-32 stud; Thread size: 1\/8-27\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement offering reliable performance at competitive pricing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e87-805605A1\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003eOP22900\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCrusader\u003c\/td\u003e\n        \u003ctd\u003e97767\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMarine Power\u003c\/td\u003e\n        \u003ctd\u003e457045\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\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\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e4.3L, 5.0L, 5.7L Engines\u003c\/td\u003e\n        \u003ctd\u003eLow oil pressure alarm system\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Number\u003c\/td\u003e\n      \u003ctd\u003e87-805605A1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePressure Rating\u003c\/td\u003e\n      \u003ctd\u003e6 PSI\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTerminal Type\u003c\/td\u003e\n      \u003ctd\u003e10-32 stud\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eThread Size\u003c\/td\u003e\n      \u003ctd\u003e1\/8-27\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFunction\u003c\/td\u003e\n      \u003ctd\u003eSenses low oil pressure and shuts off electric fuel pump\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e1 × Oil Pressure Sender Sensor Switch\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery's negative terminal to prevent electrical shorts during installation.\u003c\/li\u003e\n  \u003cli\u003eLocate the existing oil pressure sender on your MerCruiser engine block or oil filter housing.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the electrical connector from the old sender by carefully pulling it away from the terminal stud.\u003c\/li\u003e\n  \u003cli\u003eUsing an appropriate wrench, unscrew the old oil pressure sender counterclockwise from the engine block.\u003c\/li\u003e\n  \u003cli\u003eClean the threaded mounting hole to remove any debris, old sealant, or metal particles.\u003c\/li\u003e\n  \u003cli\u003eApply a small amount of thread sealant (Teflon tape or pipe sealant) to the threads of the new sender.\u003c\/li\u003e\n  \u003cli\u003eHand-thread the new oil pressure sender clockwise into the mounting hole until snug.\u003c\/li\u003e\n  \u003cli\u003eTighten the sender with a wrench to the manufacturer's recommended torque specification (typically 10–15 ft-lbs)—do not overtighten.\u003c\/li\u003e\n  \u003cli\u003eReconnect the electrical connector to the 10-32 stud terminal on the new sender.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery's negative terminal.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and check for oil leaks around the sender; verify that the oil pressure alarm system functions correctly.\u003c\/li\u003e\n  \u003cli\u003eIf the alarm does not activate under low-pressure conditions or leaks persist, re-check installation and connections.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this oil pressure sender fits my MerCruiser engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify that your engine is a 4.3L, 5.0L, or 5.7L MerCruiser model and that your original sender matches part number 87-805605A1, OP22900, 97767, or 457045. Cross-reference the terminal type (10-32 stud) and thread size (1\/8-27) with your existing sender.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my oil pressure sender needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include a constantly illuminated or flickering oil pressure warning light, failure of the alarm to activate during low oil pressure, erratic gauge readings, or visible oil leaks around the sender body.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the oil pressure sender?\u003c\/strong\u003e\u003cbr\u003e\nA: Oil pressure senders typically last several years under normal conditions. Replace immediately if you notice warning light malfunctions, erratic readings, or oil leaks. Regular engine maintenance inspections can help identify issues early.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this aftermarket sender shut off the fuel pump like the OEM part?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this aftermarket sender is designed to sense low oil pressure at 6 PSI and trigger the shutoff signal to the electric fuel pump, just like the original OEM component.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: OEM vs. Aftermarket?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51966113644857,"sku":"21SR014","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Uffa9bb4ef44440df88806114f48d8b63r.webp?v=1771923853","url":"https:\/\/jlmmarine.com\/ru\/products\/87-805605a1-oil-pressure-sender-sensor-switch-for-mercruiser-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}