{"product_id":"marine-alternator-for-mercruiser-sterndrive-55-amp-single-groove-pulley-replaces-817119a4-sierra-18-5960","title":"Sierra 18-5960 Alternator, 65 Amp, White, Replaces Mercury Marine 807653T, for MerCruiser 5.7L and 350 Mag GM V-8 Engines","description":"\u003cp\u003eThe Sierra 18-5960 is a 65 amp marine alternator built for MerCruiser stern drive applications, supplying reliable charging output to the starting and house battery systems on GM V-8 powered boats. It uses a serpentine pulley and runs on a 12 volt system, matching the charging architecture found on 5.7L and 350 Magnum MerCruiser engines. The alternator is finished in white to match factory engine covers and hardware, and it mounts using a standard engine-mount bracket configuration.\u003c\/p\u003e\u003cp\u003eSierra manufactures the 18-5960 to meet or exceed the performance of the original equipment part it replaces, making it a direct functional match for the Mercury Marine 807653T alternator. It is also cross-referenced to equivalent units from Arco, Mallory, and MES, so boat owners replacing a failed factory or aftermarket alternator can install the 18-5960 without modifying wiring or brackets. The unit ships complete and ready to install in place of the original alternator.\u003c\/p\u003e\u003cp\u003eFitment covers MerCruiser 5.7L EFI MIE GM V-8 engines from 1997, and 350 Magnum EFI and MPI GM V-8 engines from 1997 and up, within the engine serial number ranges noted below.\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 18-5960\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmp Rating:\u003c\/strong\u003e 65 Amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Type:\u003c\/strong\u003e Serpentine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12 Volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Engine Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 9 inches D x 6 inches W x 6 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 12 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Equivalent Part Number:\u003c\/strong\u003e Mercury Marine 807653T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e5.7L EFI MIE GM V-8, 1997, engine serial number range K040300 to K999999\u003c\/li\u003e\n\u003cli\u003e350 Mag. EFI \u0026amp; MPI GM V-8, 1997 \u0026amp; Up, engine serial number range K001501 \u0026amp; Up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 807653T\u003c\/li\u003e\n\u003cli\u003eArco 60060\u003c\/li\u003e\n\u003cli\u003eMallory 9-19104\u003c\/li\u003e\n\u003cli\u003eMES 3146M\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5960 alternator fit?\u003c\/strong\u003e The Sierra 18-5960 fits MerCruiser 5.7L EFI MIE GM V-8 engines from 1997 (engine serial numbers K040300 to K999999) and 350 Magnum EFI and MPI GM V-8 engines from 1997 and up (engine serial number K001501 and up).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-5960 a direct replacement for the Mercury Marine 807653T alternator?\u003c\/strong\u003e Yes, the Sierra 18-5960 is the OEM equivalent of the Mercury Marine 807653T alternator and is designed to meet or exceed the performance of the original part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat amp output does this alternator provide?\u003c\/strong\u003e The Sierra 18-5960 is rated at 65 amps, supplying charging current to the battery and electrical system on MerCruiser stern drive engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat voltage system is the 18-5960 designed for?\u003c\/strong\u003e This alternator operates on a 12 volt system, matching standard MerCruiser GM V-8 charging systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pulley type does the Sierra 18-5960 use?\u003c\/strong\u003e It uses a serpentine pulley, so the drive belt configuration should match a serpentine belt setup on the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5960 alternator weigh?\u003c\/strong\u003e The Sierra 18-5960 weighs 12 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this alternator?\u003c\/strong\u003e The Sierra 18-5960 measures 9 inches deep by 6 inches wide by 6 inches high.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5960 cross-reference to other aftermarket brands?\u003c\/strong\u003e Yes, the 18-5960 is interchangeable with Arco 60060, Mallory 9-19104, and MES 3146M in addition to its Mercury Marine 807653T equivalence.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-5960 alternator?\u003c\/strong\u003e This alternator is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-5960 mounted to the engine?\u003c\/strong\u003e The Sierra 18-5960 uses a standard engine mount configuration for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5960 a genuine Sierra part or a generic aftermarket unit?\u003c\/strong\u003e The 18-5960 is manufactured by Sierra as a branded replacement alternator, built to meet or exceed the original equipment part it replaces rather than being an unbranded generic unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-5960?\u003c\/strong\u003e Ordering the Sierra 18-5960 includes one complete 65 amp alternator, ready to install in place of the original unit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988347039963,"sku":"SIE-18-5960","price":268.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-5960__74422.1722501148.500.750.jpg?v=1785188629","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-alternator-for-mercruiser-sterndrive-55-amp-single-groove-pulley-replaces-817119a4-sierra-18-5960","provider":"Good Vibes Marina","version":"1.0","type":"link"}