{"product_id":"voltage-regulator-for-mercury-mariner-yamaha-4-cylinder-4-stroke-outboards-replaces-881346t-68v-81960-00-00-75-115-hp-mpn-18-99439","title":"Sierra Voltage Regulator 18-99439, Replaces 881346T, for Mercury\/Mariner 75-115HP and Yamaha 4-Stroke Outboards","description":"\u003cp\u003eThe Sierra 18-99439 Voltage Regulator is a direct-fit electrical component for 4 cylinder outboard engines, built to regulate charging voltage and protect the engine's electrical system from overcharging. It is constructed of marine-grade materials to withstand the corrosive marine environment and is designed for quick, straightforward installation in place of the original unit.\u003c\/p\u003e\u003cp\u003eThis regulator fits Mercury\/Mariner 75-115HP 4-Stroke outboards, as well as Yamaha 50-90HP (2005-2006) and Yamaha 115HP (2000-2006) 4-Stroke outboards. It is a direct cross-reference replacement for OEM part numbers 881346T, 68V-81960-00-00, and 6D3-81960-00-00, making it a straightforward swap for boaters replacing a failed or aging factory voltage regulator. Always confirm the part number on your existing regulator or consult your engine's service manual before ordering to ensure correct fitment.\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 18-99439\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.85 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Marine-grade materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Type:\u003c\/strong\u003e 4 Cylinder Outboard Engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Mercury\/Mariner 75-115HP 4-Stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Yamaha 50-90HP (2005-2006) 4-Stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Yamaha 115HP (2000-2006) 4-Stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 881346T, 68V-81960-00-00, 6D3-81960-00-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 736983861191\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 75-115HP 4-Stroke\u003c\/li\u003e\n\u003cli\u003eYamaha 50-90HP (2005-2006) 4-Stroke\u003c\/li\u003e\n\u003cli\u003eYamaha 115HP (2000-2006) 4-Stroke\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e881346T\u003c\/li\u003e\n\u003cli\u003e68V-81960-00-00\u003c\/li\u003e\n\u003cli\u003e6D3-81960-00-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99439 voltage regulator do?\u003c\/strong\u003e It regulates the charging voltage produced by a 4 cylinder outboard's stator, protecting the battery and electrical system from overcharging. The Sierra 18-99439 is designed as a direct replacement for the factory regulator on compatible outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard engines does part 18-99439 fit?\u003c\/strong\u003e The 18-99439 fits Mercury\/Mariner 75-115HP 4-Stroke outboards, Yamaha 50-90HP (2005-2006) 4-Stroke outboards, and Yamaha 115HP (2000-2006) 4-Stroke outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99439 compatible with Yamaha outboards, or only Mercury?\u003c\/strong\u003e Both. In addition to Mercury\/Mariner 75-115HP 4-Stroke engines, the 18-99439 is compatible with Yamaha 50-90HP (2005-2006) and Yamaha 115HP (2000-2006) 4-Stroke outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-99439 replace?\u003c\/strong\u003e The Sierra 18-99439 replaces OEM numbers 881346T, 68V-81960-00-00, and 6D3-81960-00-00, so it can be used as a drop-in swap for any of those factory regulators.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99439 voltage regulator weigh?\u003c\/strong\u003e The Sierra 18-99439 voltage regulator weighs 0.85 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-99439 regulator made of?\u003c\/strong\u003e It is constructed of marine-grade materials, built to hold up to the corrosive conditions of a marine engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket equivalent?\u003c\/strong\u003e The 18-99439 is a Sierra-branded voltage regulator sold as a direct-fit replacement for the listed OEM part numbers, not a repackaged factory unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99439 work on a 6-cylinder outboard?\u003c\/strong\u003e No. The Sierra 18-99439 is designed specifically for 4 cylinder outboard engines within the listed Mercury\/Mariner and Yamaha horsepower ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my old regulator matches this part?\u003c\/strong\u003e Check your existing regulator for one of the OEM numbers 881346T, 68V-81960-00-00, or 6D3-81960-00-00, or confirm your engine falls within the Mercury\/Mariner 75-115HP or Yamaha 50-90HP\/115HP 4-Stroke ranges the Sierra 18-99439 covers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99439 require special tools to install?\u003c\/strong\u003e It is designed for straightforward installation in place of the original regulator; no special tools beyond standard hand tools are needed, though manufacturer installation guidelines should be followed for proper fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99439?\u003c\/strong\u003e The Sierra 18-99439 voltage regulator has UPC 736983861191.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444459227,"sku":"SIE-18-99439","price":158.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/194-0001__15208.1722373987.500.750.jpg?v=1785188873","url":"https:\/\/www.goodvibesmarina.com\/products\/voltage-regulator-for-mercury-mariner-yamaha-4-cylinder-4-stroke-outboards-replaces-881346t-68v-81960-00-00-75-115-hp-mpn-18-99439","provider":"Good Vibes Marina","version":"1.0","type":"link"}