{"product_id":"voltage-regulator-rectifier-for-mercury-75-90-hp-4-stroke-804278a12","title":"Voltage Regulator Rectifier for Mercury 75-90 HP 4 Stroke 804278A12","description":"\u003cstrong\u003eThis Voltage Regulator Rectifier is an electrical component compatible with Mercury 75–90 HP 4-stroke outboard engines and matches OEM Part# 804278A12, 804278T11.\u003c\/strong\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis voltage regulator rectifier converts AC voltage from the stator to regulated DC voltage for charging the battery and powering electrical systems on Mercury 75–90 HP 4-stroke outboards. It maintains stable output to protect sensitive electronics and ensure reliable engine operation. Designed for direct OEM replacement, it restores proper charging performance on compatible Mercury marine engines.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement for OEM part numbers 804278A12 and 804278T11\u003c\/li\u003e\n\u003cli\u003eRegulates output to maintain stable battery charging voltage\u003c\/li\u003e\n\u003cli\u003eSolid-state design for long service life in marine environments\u003c\/li\u003e\n\u003cli\u003ePlug-and-play installation with factory-style connectors\u003c\/li\u003e\n\u003cli\u003eCompatible with Mercury 75, 80, 85, and 90 HP 4-stroke outboards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Mercury Marine 75 HP 4-stroke outboard engines\u003c\/li\u003e\n\u003cli\u003eCompatible with Mercury Marine 80 HP 4-stroke outboard engines\u003c\/li\u003e\n\u003cli\u003eCompatible with Mercury Marine 85 HP 4-stroke outboard engines\u003c\/li\u003e\n\u003cli\u003eCompatible with Mercury Marine 90 HP 4-stroke outboard engines\u003c\/li\u003e\n\u003cli\u003eReplaces OEM part numbers 804278A12 and 804278T11\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplacement of failed or underperforming voltage regulators on Mercury 4-stroke outboards\u003c\/li\u003e\n\u003cli\u003eRestoring charging system function on fishing, cruising, and utility boats\u003c\/li\u003e\n\u003cli\u003eMaintenance and repair of Mercury outboard electrical systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 804278A12, 804278T11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Voltage Regulator Rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolarity:\u003c\/strong\u003e Negative ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e Weatherpack-style connector (integrated)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this voltage regulator rectifier work on my Mercury 90 HP 4-stroke from 2005?\u003cstrong\u003e A:\u003c\/strong\u003e Yes, it is designed for Mercury 75–90 HP 4-stroke outboards, including 2005 model years, as a direct replacement for 804278A12 and 804278T11.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does it come with mounting hardware or just the unit?\u003cstrong\u003e A:\u003c\/strong\u003e The unit includes the regulator\/rectifier only; mounting screws and wiring are sold separately if needed.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53676803883281,"sku":"ZZ2Y01932","price":90.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/57_563560d2-8f6d-460b-9e1a-4d59dbff7819.jpg?v=1781578486","url":"https:\/\/www.duraforce.com\/products\/voltage-regulator-rectifier-for-mercury-75-90-hp-4-stroke-804278a12","provider":"DURAFORCE","version":"1.0","type":"link"}