{"product_id":"voltage-regulator-for-mercury-outboard-150-200-hp-with-16-40-amp-charging-system-1989-1991-replaces-815279a2-mpn-18-5741","title":"Sierra Voltage Regulator 18-5741, Replaces 815279A2 and 815279-1, for Mercury 16\/40 Amp Charging Systems 1989-91","description":"\u003cp\u003eThe Sierra 18-5741 Voltage Regulator is a direct-fit replacement regulator for Mercury outboard engines equipped with a 16 amp or 40 amp charging system, model years 1989-91. The voltage regulator manages the output of the engine's charging system, protecting the battery and onboard electronics from overcharging while ensuring consistent electrical performance on the water.\u003c\/p\u003e\u003cp\u003eThis regulator is built to match the original Mercury part it replaces, so it installs using the existing wiring and mounting points on applicable 1989-91 Mercury engines with 16 amp or 40 amp charging systems. It is a compact, mount-ready component intended as a straightforward swap for a failed or aging factory voltage regulator.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-5741\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282239992\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Voltage Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.86 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 815279A2, 815279-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury engines with 16 amp or 40 amp charging system, model\/years 1989-91\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e815279A2\u003c\/li\u003e\n\u003cli\u003e815279-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5741 voltage regulator fit?\u003c\/strong\u003e The Sierra 18-5741 fits Mercury engines equipped with a 16 amp or 40 amp charging system, model\/years 1989-91.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-5741 replace?\u003c\/strong\u003e It replaces Mercury 815279A2 and 815279-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5741 voltage regulator weigh?\u003c\/strong\u003e It weighs 0.86 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-5741?\u003c\/strong\u003e The regulator measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5741 a direct OEM replacement?\u003c\/strong\u003e Yes, the 18-5741 is designed to install as a direct replacement for Mercury 815279A2 and 815279-1 regulators on applicable 1989-91 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this regulator work on a 16 amp charging system as well as a 40 amp system?\u003c\/strong\u003e Yes, the 18-5741 is designed for Mercury engines with either a 16 amp or 40 amp charging system, model\/years 1989-91.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5741 include mounting hardware?\u003c\/strong\u003e The Sierra 18-5741 is the voltage regulator unit itself; the dossier does not list included mounting hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-5741 voltage regulator?\u003c\/strong\u003e The UPC for the Sierra 18-5741 is 808282239992.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-5741 on a Mercury engine outside the 1989-91 range?\u003c\/strong\u003e The 18-5741 is specified for Mercury engines with 16 amp or 40 amp charging systems in model\/years 1989-91; fitment outside that range is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace a voltage regulator like the 18-5741?\u003c\/strong\u003e A voltage regulator controls charging output to the battery and electrical system; a failing unit can cause overcharging or a battery that won't hold a charge, and the 18-5741 is built to restore that function on applicable 1989-91 Mercury engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988230123739,"sku":"SIE-18-5741","price":110.71,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5741_lg__02925.1558129448.500.750.jpg?v=1785188725","url":"https:\/\/www.goodvibesmarina.com\/products\/voltage-regulator-for-mercury-outboard-150-200-hp-with-16-40-amp-charging-system-1989-1991-replaces-815279a2-mpn-18-5741","provider":"Good Vibes Marina","version":"1.0","type":"link"}