{"product_id":"marine-alternator-12v-75a-replaces-volvo-penta-3862665-3884950","title":"Marine Alternator 12V 75A – Replaces Volvo Penta 3862665 \/ 3884950 | SKU 57-60073","description":"\u003cp\u003eA direct-fit aftermarket replacement alternator for late-model Volvo Penta inboard and sterndrive engines using a 12-volt electrical system and 50mm multi-groove serpentine belt drive. This 75-amp unit replaces Volvo Penta OEM part numbers 3862665 and 3884950, and also cross-references Sierra 18-5882 and 18-6845. The serpentine pulley is included, making this a complete drop-in replacement with no additional hardware required. At 75 amps, this is a high-output unit well suited to Volvo Penta applications with moderate to heavy house loads.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVolvo Penta 5.0L GXi, OSi, and FSi series sterndrives with 12V serpentine belt system\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta 5.7L GXi, OSi, and FSi series sterndrives with 12V serpentine belt system\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta 8.1L Gi and GXi series inboard engines\u003c\/li\u003e\n  \u003cli\u003eLate-model Volvo Penta V8 and V6 marine engines equipped with 50mm multi-groove serpentine drive\u003c\/li\u003e\n  \u003cli\u003eCross-references: Volvo Penta 3862665, 3884950; Sierra 18-5882, 18-6845\u003c\/li\u003e\n  \u003cli\u003eConfirm fitment against your engine serial number — belt groove count, pulley diameter, and mounting configuration must match\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eReplaces\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVolvo Penta OEM:\u003c\/strong\u003e 3862665, 3884950\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSierra:\u003c\/strong\u003e 18-5882, 18-6845\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 57-60073\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e 75 Amps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBelt Drive:\u003c\/strong\u003e 50mm multi-groove serpentine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePulley:\u003c\/strong\u003e Serpentine pulley included\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Aftermarket direct replacement\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Products — Volvo Penta Belts \u0026amp; Charging Accessories\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/volvo-penta-serpentine-drive-belt-3860086\"\u003eVolvo Penta Serpentine Drive Belt – 3860086\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/volvo-penta-serpentine-v-belt-21132390\"\u003eVolvo Penta Serpentine V Belt – 21132390\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/volvo-penta-drive-belt-861564-marine-engine-serpentine-belt\"\u003eVolvo Penta Drive Belt 861564 – Marine Engine Serpentine Belt\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/volvo-penta-serpentine-belt-idler-pulley-3861009\"\u003eVolvo Penta Serpentine Belt Idler Pulley – 3861009\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/volvo-penta-idler-pulley-3860201\"\u003eVolvo Penta Idler Pulley – 3860201\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/marine-alternator-12v-55a-replaces-mercruiser-817119a1\"\u003eMarine Alternator 12V 55A – Replaces MerCruiser 817119A1\u003c\/a\u003e — lower-output option for other engine families\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/marine-alternator-12v-65a-replaces-mercruiser-805447t\"\u003eMarine Alternator 12V 65A – Replaces MerCruiser 805447T\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003eThis is the correct unit for Volvo Penta owners who need a reliable, high-output replacement for a failed or underperforming alternator on late-model GXi and Gi series engines. The 75-amp output handles a full electronics complement comfortably — chartplotter, VHF, AIS, autopilot, and a 12V fridge running simultaneously won’t push this unit past 60–70% load at cruise RPM, which is exactly where you want it for long alternator life. The serpentine pulley is included, which saves you the hassle of pressing off and re-using the old pulley. When fitting, always replace the serpentine belt at the same time — a worn belt on a new alternator is a common cause of slip, noise, and premature bearing wear. Check the \u003ca href=\"\/products\/volvo-penta-serpentine-drive-belt-3860086\"\u003eVolvo Penta serpentine drive belts\u003c\/a\u003e and \u003ca href=\"\/products\/volvo-penta-serpentine-belt-idler-pulley-3861009\"\u003eidler pulley\u003c\/a\u003e in our Volvo Penta accessories. The cross-reference to Sierra 18-5882 and 18-6845 makes this easy to verify against your existing parts records if you’ve serviced this engine before.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":50992569810980,"sku":"57-60073","price":434.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/57-60073_f1e4c105-6530-4c4f-93c1-6a4cbc3749dc.jpg?v=1782713948","url":"https:\/\/marisolmarine.com\/products\/marine-alternator-12v-75a-replaces-volvo-penta-3862665-3884950","provider":"Marisol Marine Company","version":"1.0","type":"link"}