{"title":"Voltage Regulators \u0026 Rectifiers","description":null,"products":[{"product_id":"rectifier-for-mercury-outboard-replaces-62351a1-816770-square-3-post-sierra-18-5707","title":"Sierra Rectifier 18-5707, Replaces Mercury Marine 62351A1, 62351A2, 816770T","description":"\u003cp\u003eThe Sierra 18-5707 is a marine rectifier built for outboard charging systems that use a square, 3 post rectifier configuration. It converts the alternating current produced by the outboard's stator into direct current to charge the battery and power onboard electronics, making it a core component of the engine's charging circuit. The housing has a machined exterior for a precise fit and reliable heat dissipation during operation. This rectifier is designed as a direct replacement for the original Mercury Marine unit, so it installs using the same 3 post mounting pattern without modification. Sierra manufactures this part to work in place of the OEM Mercury Marine rectifier and backs it with Sierra's industry leading customer satisfaction warranty, giving boat owners a dependable option for restoring their outboard's charging system. Compact and lightweight at just over two ounces on the water and rated in the specifications below, the 18-5707 is sized to fit within the same footprint as the original equipment part it replaces.\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 18-5707\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.13 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 2 x 4 x 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost Configuration:\u003c\/strong\u003e Square, 3 post rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999319524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Voltage Regulators\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAll outboard applications using a square, 3 post rectifier\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 62351A1\u003c\/li\u003e\n\u003cli\u003eMercury Marine 62351A2\u003c\/li\u003e\n\u003cli\u003eMercury Marine 816770T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5707 rectifier fit?\u003c\/strong\u003e The Sierra 18-5707 fits outboard applications that use a square, 3 post rectifier configuration, and is designed as a direct replacement for the Mercury Marine rectifier it corresponds to.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich Mercury Marine part numbers does the 18-5707 replace?\u003c\/strong\u003e It replaces Mercury Marine 62351A1, 62351A2, and 816770T.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5707 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-5707 is a Sierra aftermarket rectifier manufactured to replace the equivalent Mercury Marine rectifier, not an OEM Mercury Marine part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5707 rectifier weigh?\u003c\/strong\u003e The Sierra 18-5707 rectifier weighs 0.13 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-5707 rectifier?\u003c\/strong\u003e The product dimensions of the Sierra 18-5707 are 2 x 4 x 4 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-5707 rectifier have?\u003c\/strong\u003e It has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many mounting posts does the 18-5707 rectifier have?\u003c\/strong\u003e The 18-5707 is a square, 3 post rectifier.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5707 come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-5707 rectifier is covered under Sierra's industry leading customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the function of the 18-5707 rectifier in an outboard's charging system?\u003c\/strong\u003e The 18-5707 converts alternating current from the outboard's stator into direct current to charge the battery and run onboard electronics.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-5707?\u003c\/strong\u003e The Sierra 18-5707 rectifier carries UPC 030999319524.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988228124891,"sku":"SIE-18-5707","price":44.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5707_lg__51359.1558128710.500.750.jpg?v=1785188140"},{"product_id":"rectifier-for-omc-evinrude-johnson-outboards-replaces-582399-583408-6-10-amp-sierra-18-5708","title":"Sierra 18-5708 Rectifier for Evinrude\/OMC Outboards 50-85 HP, Replaces OMC 582399 583408","description":"\u003cp\u003eThe Sierra 18-5708 is a voltage rectifier built for Evinrude\/OMC outboard motors, converting the alternating current from the engine's stator into direct current to charge the battery and power onboard electrical systems. As the charging system fails to keep the battery topped off, or the engine shows signs of an overcharging or no-charge condition, the rectifier is one of the first components to inspect, and the 18-5708 is a direct replacement for the original units used across a wide range of Evinrude\/OMC outboard horsepower classes.\u003c\/p\u003e\u003cp\u003eThis rectifier is finished in white and is a compact, sealed component designed to mount in the original location using the factory hardware pattern. It carries the Sierra part number 18-5708 and cross-references directly to OMC part numbers 582399 and 583408, so it can be ordered as a like-for-like replacement without modification to the surrounding wiring harness. Sierra backs the part with its standard limited warranty coverage, and every unit is manufactured to fit the outboard applications listed below without further adaptation.\u003c\/p\u003e\u003cp\u003eFitment spans a broad range of Evinrude\/OMC outboards by horsepower and model year, including 50, 55, 60 (including the SST60), 65, 70, 75, and 85 HP engines produced across multiple production years. Always confirm the horsepower and model year of the outboard against the fitment list before ordering to ensure the 18-5708 is the correct rectifier for the application.\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 18-5708\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Outboard Rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999236722\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e OMC 582399, OMC 583408\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEvinrude\/OMC 50 HP, 1971-75\u003c\/li\u003e\n\u003cli\u003eEvinrude\/OMC 55 HP, 1976-77\u003c\/li\u003e\n\u003cli\u003eEvinrude\/OMC 60 HP, 1970, 1971\u003c\/li\u003e\n\u003cli\u003eEvinrude\/OMC 60 HP, 1989-91\u003c\/li\u003e\n\u003cli\u003eEvinrude\/OMC SST60, 1989-90\u003c\/li\u003e\n\u003cli\u003eEvinrude\/OMC 65 HP, 1972-73, 1988-91\u003c\/li\u003e\n\u003cli\u003eEvinrude\/OMC 70 HP, 1992-01\u003c\/li\u003e\n\u003cli\u003eEvinrude\/OMC 75 HP, 1975-88\u003c\/li\u003e\n\u003cli\u003eEvinrude\/OMC 85 HP, 1970-80\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOMC 582399\u003c\/li\u003e\n\u003cli\u003eOMC 583408\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5708 rectifier do?\u003c\/strong\u003e It converts the alternating current produced by an Evinrude\/OMC outboard's stator into direct current, which is what charges the battery and runs the boat's electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboards fit the Sierra 18-5708?\u003c\/strong\u003e The 18-5708 fits Evinrude\/OMC outboards including 50 HP (1971-75), 55 HP (1976-77), 60 HP (1970, 1971 and again 1989-91), SST60 (1989-90), 65 HP (1972-73, 1988-91), 70 HP (1992-01), 75 HP (1975-88), and 85 HP (1970-80).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5708 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-manufactured aftermarket rectifier built to replace the original OMC unit, cross-referencing directly to OMC part numbers 582399 and 583408.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-5708 replace?\u003c\/strong\u003e The Sierra 18-5708 replaces OMC 582399 and OMC 583408.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5708 rectifier weigh?\u003c\/strong\u003e The 18-5708 rectifier weighs 0.15 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-5708?\u003c\/strong\u003e It is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the SST60 outboard use the same rectifier as the standard 60 HP model?\u003c\/strong\u003e Yes, the SST60 (1989-90) uses the same Sierra 18-5708 rectifier as the 60 HP Evinrude\/OMC outboards from 1989-91.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the signs a rectifier like the 18-5708 needs to be replaced?\u003c\/strong\u003e A failing rectifier typically shows up as a battery that will not hold a charge, an overcharging condition, or erratic charging system readings on an Evinrude\/OMC outboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-5708 straightforward?\u003c\/strong\u003e The Sierra 18-5708 is designed as a direct replacement for the original OMC 582399 or 583408 rectifier, mounting in the factory location using the existing wiring connections.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-5708?\u003c\/strong\u003e Each order includes one Sierra 18-5708 rectifier.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra offer a warranty on the 18-5708 rectifier?\u003c\/strong\u003e Yes, the 18-5708 is covered under Sierra's standard limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988228714715,"sku":"SIE-18-5708","price":40.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5708_lg__32168.1558128745.500.750.jpg?v=1785188423"},{"product_id":"sierra-18-5709-marine-rectifier-for-johnson-evinrude-outboard-replaces-omc-581778-fits-up-to-9-9-hp","title":"Sierra 18-5709 Marine Rectifier, Replaces OMC 581778, for Johnson\/Evinrude Outboard Motors 9.9-40 HP","description":"\u003cp\u003eThe Sierra 18-5709 is a marine rectifier built as a direct replacement for the charging system on Johnson\/Evinrude outboard motors. It converts the AC output from the outboard's alternator into DC current to keep the battery charged while running, a critical function for reliable starting and onboard electronics. The housing is constructed of metal and plastic with a white finish, and it uses an engine-mount design so it bolts into the same location as the original unit on gasoline outboard motors.\u003c\/p\u003e\u003cp\u003eThis rectifier is engineered as an equivalent to OMC part number 581778, giving boat owners a straightforward way to source a charging-system replacement without hunting for a discontinued OEM part. It is designed for outboards rated up to 9.9 horsepower and is also listed across a range of Johnson\/Evinrude engines from 9.9 HP through 40 HP, spanning multiple production years, including several 2-cylinder configurations. Every Sierra part is backed by Sierra's standard limited warranty, giving buyers confidence in fit and function.\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 18-5709\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Outboard Rectifier\/Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal, Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.16 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Type:\u003c\/strong\u003e Outboard Motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Engine Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Brand:\u003c\/strong\u003e Johnson\/Evinrude\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e OMC 581778\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e9.9, 15 HP, 1974-92\u003c\/li\u003e\n\u003cli\u003e20 HP, 1989-98\u003c\/li\u003e\n\u003cli\u003e25 HP (2 Cylinder), 1977-03\u003c\/li\u003e\n\u003cli\u003e28 HP, 1989-96\u003c\/li\u003e\n\u003cli\u003e30 HP (2 Cylinder), 1989-03\u003c\/li\u003e\n\u003cli\u003e35 HP (2 Cylinder), 1976-93\u003c\/li\u003e\n\u003cli\u003e40 HP, 1974-76, 1988-92\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 581778\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5709 rectifier do?\u003c\/strong\u003e It converts the AC current produced by a Johnson\/Evinrude outboard's alternator into DC current to charge the battery, which is essential for reliable starting and onboard electrical systems on the motor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5709 a direct replacement for OMC 581778?\u003c\/strong\u003e Yes, the 18-5709 is built as a replacement for OMC part number 581778 and mounts in the same engine location as the original rectifier.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard motors fit the Sierra 18-5709 rectifier?\u003c\/strong\u003e It fits Johnson\/Evinrude outboards including 9.9 and 15 HP (1974-92), 20 HP (1989-98), 25 HP 2-cylinder (1977-03), 28 HP (1989-96), 30 HP 2-cylinder (1989-03), 35 HP 2-cylinder (1976-93), and 40 HP (1974-76, 1988-92).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-5709 rectifier made of?\u003c\/strong\u003e The housing is made of metal and plastic with a white finish, designed for engine-mount installation on gasoline outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5709 rectifier weigh?\u003c\/strong\u003e The Sierra 18-5709 rectifier weighs 0.16 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5709 fit a 9.9 HP Johnson outboard?\u003c\/strong\u003e Yes, the 18-5709 is listed for 9.9 and 15 HP Johnson\/Evinrude outboards from 1974-92.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5709 fit 25 HP two-cylinder Evinrude motors?\u003c\/strong\u003e Yes, it fits the 25 HP 2-cylinder Johnson\/Evinrude outboard covering model years 1977-03.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-5709 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-5709 is a Sierra-manufactured replacement rectifier engineered as an equivalent to OEM part OMC 581778, not an original OMC-branded component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-5709 rectifier mounted?\u003c\/strong\u003e It uses an engine-mount design, installing directly onto the outboard motor in place of the original charging-system rectifier.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-5709 come with a warranty?\u003c\/strong\u003e Yes, the 18-5709 rectifier is covered under Sierra's standard limited warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-5709?\u003c\/strong\u003e The order includes one Sierra 18-5709 rectifier unit for Johnson\/Evinrude outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5709 fit a 40 HP Evinrude?\u003c\/strong\u003e Yes, the 18-5709 fits 40 HP Johnson\/Evinrude outboards from 1974-76 and 1988-92.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988229697755,"sku":"SIE-18-5709","price":41.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5709_lg__72558.1558128793.500.750.jpg?v=1785188118"},{"product_id":"sierra-18-5710-voltage-regulator-for-chrysler-inboard-marine-engines-replaces-prestolite-vsh-6201jy-chrysler-2847527","title":"Sierra 18-5710 Voltage Regulator, Replaces Chrysler Inboard 2847527 and Prestolite VSH-6201JY","description":"\u003cp\u003eThe Sierra 18-5710 is a marine voltage regulator built to manage charging voltage in a boat's electrical system, keeping the battery and onboard electronics supplied with properly regulated power. It is manufactured as a direct equivalent to the Chrysler Inboard 2847527 and Prestolite VSH-6201JY voltage regulators, allowing it to be installed as a replacement for either original part. The housing is a compact, cube-shaped unit measuring 0.39 x 0.39 x 0.39 inches with a machined exterior finish, and the complete unit weighs 0.32 pounds, making it a lightweight, straightforward swap for the original regulator it replaces. The 18-5710 is manufactured in the United States and carries the Sierra brand name, a name widely used in marine replacement electrical components. Buyers replacing a failed or aging voltage regulator on Chrysler Inboard or Prestolite-equipped charging systems can use the 18-5710 as a like-for-like functional replacement without modifying the surrounding wiring or mounting hardware.\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 18-5710\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Voltage Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.32 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\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999319548\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Chrysler Inboard 2847527, Prestolite VSH-6201JY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eChrysler Inboard 2847527\u003c\/li\u003e\n\u003cli\u003ePrestolite VSH-6201JY\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5710 voltage regulator replace?\u003c\/strong\u003e The Sierra 18-5710 is a direct equivalent for Chrysler Inboard 2847527 and Prestolite VSH-6201JY, so it can be installed in place of either of those regulators.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-5710?\u003c\/strong\u003e This regulator measures 0.39 x 0.39 x 0.39 inches, a small cube-shaped housing sized to mount in the original regulator's location.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5710 weigh?\u003c\/strong\u003e The 18-5710 voltage regulator weighs 0.32 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-5710 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket part manufactured by Sierra, built as a functional equivalent to the Chrysler Inboard 2847527 and Prestolite VSH-6201JY regulators rather than a part sourced from those original manufacturers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-5710 housing have?\u003c\/strong\u003e The housing on the Sierra 18-5710 has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5710 fit a Chrysler Inboard engine that originally used part number 2847527?\u003c\/strong\u003e Yes, the Sierra 18-5710 cross-references directly to Chrysler Inboard 2847527, so it is built to replace that regulator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5710 cross-reference to a Prestolite part number?\u003c\/strong\u003e The Sierra 18-5710 is the equivalent to Prestolite VSH-6201JY.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-5710?\u003c\/strong\u003e An order of the Sierra 18-5710 includes a single voltage regulator unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of part is the 18-5710?\u003c\/strong\u003e The 18-5710 is a marine voltage regulator used to control charging voltage in a boat's electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-5710 manufactured?\u003c\/strong\u003e The Sierra 18-5710 voltage regulator is manufactured in the United States.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-5710?\u003c\/strong\u003e The UPC for the Sierra 18-5710 voltage regulator is 030999319548.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988229730523,"sku":"SIE-18-5710","price":64.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5710_lg__95555.1558128882.500.750.jpg?v=1785188859"},{"product_id":"sierra-18-5732-1-voltage-regulator-for-mercury-mariner-30-40-50-60-efi-4-stroke-outboards-replaces-893640t01","title":"Sierra Voltage Regulator 18-5732-1, Replaces 893640T01, Fits Mercury\/Mariner 30\/40\/50\/60 EFI 4-Stroke Outboards","description":"\u003cp\u003eThis Sierra voltage regulator, part number 18-5732-1, is an electrical system component built for Mercury\/Mariner 30\/40\/50\/60 EFI 4-Stroke outboard engines. It regulates the charging voltage produced by the outboard's stator to keep the battery charging system operating within a safe range, protecting onboard electronics and the battery from damage caused by overcharging.\u003c\/p\u003e\u003cp\u003eThe regulator includes a built-in capacitor that provides high voltage spike protection, helping guard connected electrical components against transient voltage surges during engine operation. It is a compact, direct-fit unit designed to mount in place of the original Mercury\/Mariner regulator, and it cross-references directly to OEM part number 893640T01, so it installs using the existing mounting points and wiring connections on applicable EFI 4-Stroke outboards.\u003c\/p\u003e\u003cp\u003eSierra manufactures this regulator to serve as a reliable replacement for outboard owners and marine technicians who need to restore proper charging system function on Mercury\/Mariner 30, 40, 50, and 60 HP EFI 4-Stroke models.\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 18-5732-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Voltage Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.64 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\u003eUPC:\u003c\/strong\u003e 808282398286\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Built-in capacitor for high voltage spike protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Mercury\/Mariner 30\/40\/50\/60 EFI 4-Stroke\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury\/Mariner 30\/40\/50\/60 EFI 4-Stroke outboards\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e893640T01\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5732-1 voltage regulator fit?\u003c\/strong\u003e The Sierra 18-5732-1 voltage regulator fits Mercury\/Mariner 30\/40\/50\/60 EFI 4-Stroke outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5732-1 a direct replacement for the Mercury 893640T01 regulator?\u003c\/strong\u003e Yes, Sierra part 18-5732-1 replaces Mercury\/Mariner OEM voltage regulator 893640T01 and installs in the same location using the original mounting and wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this voltage regulator include surge protection?\u003c\/strong\u003e Yes, the Sierra 18-5732-1 has a built-in capacitor that provides high voltage spike protection for the outboard's electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-5732-1 voltage regulator?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5732-1 voltage regulator weigh?\u003c\/strong\u003e This voltage regulator weighs 0.64 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the function of a voltage regulator on an outboard motor?\u003c\/strong\u003e A voltage regulator like the Sierra 18-5732-1 controls the charging voltage sent from the stator to the battery, preventing overcharging and protecting the battery and onboard electronics.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5732-1 work on any Mercury outboard?\u003c\/strong\u003e No, the Sierra 18-5732-1 is designed specifically for Mercury\/Mariner 30\/40\/50\/60 EFI 4-Stroke outboard models, not the full Mercury outboard lineup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-5732-1 an OEM or aftermarket part?\u003c\/strong\u003e The 18-5732-1 is a Sierra-manufactured aftermarket voltage regulator engineered to replace Mercury\/Mariner OEM part 893640T01.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-5732-1 come with mounting hardware?\u003c\/strong\u003e The dossier for the Sierra 18-5732-1 voltage regulator does not list included mounting hardware; it is sold as the regulator unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-5732-1 cross-reference to?\u003c\/strong\u003e It cross-references to Mercury\/Mariner OEM part number 893640T01.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988229828827,"sku":"SIE-18-5732-1","price":156.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5732__54831.1558185449.500.750.jpg?v=1785188103"},{"product_id":"voltage-regulator-for-mercury-outboard-16-40-amp-charging-systems-replaces-815279a2-883072t-sierra-18-5743-1","title":"Sierra Voltage Regulator 18-5743-1, Replaces 815279A2 815279-1, Fits Mercury 16\/40 Amp Charging Systems 1989-91","description":"\u003cp\u003eThe Sierra 18-5743-1 voltage regulator is a direct-fit electrical component for Mercury outboard engines equipped with a 16 amp or 40 amp charging system, model years 1989-91. It regulates the output of the engine's charging system, protecting the battery and onboard electronics from overcharging while maintaining stable voltage output during operation. The unit is wired with a black, yellow, red, red, yellow, and gray wire set; the black wire connects to engine ground.\u003c\/p\u003e\u003cp\u003eThis regulator is a straightforward replacement for the original Mercury charging system regulator on covered engines, restoring proper charging function without modifying existing wiring. It is built to the same fit and connection points as the original equipment part it replaces.\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 18-5743-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Voltage Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282392321\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.63 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Colors:\u003c\/strong\u003e Black, Yellow, Red, Red, Yellow, Gray\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Wire:\u003c\/strong\u003e Black wire connects to engine ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharging System Compatibility:\u003c\/strong\u003e 16 amp or 40 amp\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 18-5743-1 voltage regulator fit?\u003c\/strong\u003e This regulator 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 this regulator replace?\u003c\/strong\u003e The 18-5743-1 replaces Mercury OEM part numbers 815279A2 and 815279-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the voltage regulator weigh?\u003c\/strong\u003e The Sierra 18-5743-1 weighs 0.63 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color wires does the 18-5743-1 have?\u003c\/strong\u003e It comes with black, yellow, red, red, yellow, and gray wires.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere does the black wire connect?\u003c\/strong\u003e The black wire on the 18-5743-1 goes to engine ground.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this regulator work with a 40 amp charging system?\u003c\/strong\u003e Yes, the 18-5743-1 is designed for Mercury engines with either a 16 amp or a 40 amp charging system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5743-1 a direct replacement for the original Mercury regulator?\u003c\/strong\u003e Yes, it is a direct replacement for Mercury regulators 815279A2 and 815279-1 on covered engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5743-1 fit engines from 1992 or later?\u003c\/strong\u003e No, this specific part number, the 18-5743-1, is designated for model\/years 1989-91.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e The Sierra 18-5743-1 voltage regulator has UPC 808282392321.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of engine charging system does this regulate?\u003c\/strong\u003e The 18-5743-1 regulates output on Mercury outboard engines with 16 amp or 40 amp charging systems.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988229959899,"sku":"SIE-18-5743-1","price":166.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5743-1__29048.1780061442.500.750.jpg?v=1785329190"},{"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"},{"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"},{"product_id":"marine-alternator-for-mercury-mercruiser-replaces-862031t-70a-12v-7si-hinge-mount-6-groove-2-44-serpentine-pulley-sierra-18-6293","title":"Sierra 18-6293 Marine Alternator, 12V 70A, Fits MerCruiser 454 Mag. MPI, 454 Mag. MPI MIE and 502 Mag. MPI GM V-8 (1998 and Up)","description":"\u003cp\u003eThe Sierra 18-6293 is a 12-volt, 70-amp marine alternator built to keep a stern drive's battery and electrical system properly charged under continuous marine duty. It is constructed with heavy-duty bearings and a heavy-duty regulator for extended service life, along with a high-quality stator and heavy-duty rectifiers to maintain charging efficiency even at high engine hours. Every unit is 100% load tested before it leaves the factory, so it is verified to perform correctly out of the box rather than relying on spot checks. The alternator meets or exceeds USCG, SAE J1171, and ISO 8846 marine safety standards, which govern spark and ignition protection aboard boats, so it is built specifically for the marine environment rather than adapted from an automotive part.\u003c\/p\u003e\u003cp\u003eElectrically it is a 12V, 70A unit with an internal fan, an M8-1.25 mounting stud, and a 6-groove, 2.44 inch diameter serpentine pulley. It uses a hinge mount configuration (7-SI style) with 8mm unthreaded mounting holes, and has a machined exterior finish. The 18-6293 is designed for MerCruiser 454 Mag. MPI, 454 Mag. MPI MIE, and 502 Mag. MPI GM V-8 engines from serial number 1998 and up, and it directly replaces several common Mercury Marine, Delco, Arco, API Marine, and Daewoo alternator part numbers, making it a straightforward drop-in charging system upgrade or replacement.\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 18-6293\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 70A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFan Type:\u003c\/strong\u003e Internal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Size:\u003c\/strong\u003e M8-1.25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Type:\u003c\/strong\u003e 6-Groove, 2.44 inch Diameter Serpentine Pulley\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Hinge Mount, 7-SI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Holes:\u003c\/strong\u003e 8mm Unthreaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 9.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 7.5 x 7.5 x 7.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282187378\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser 454 Mag. MPI GM V-8, 1998 and up (serial number L010029 and up)\u003c\/li\u003e\n\u003cli\u003eMerCruiser 454 Mag. MPI MIE GM V-8, 1998 and up (serial number L002200 and up)\u003c\/li\u003e\n\u003cli\u003eMerCruiser 502 Mag. MPI GM V-8, 1998 and up (serial number L017000 and up)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 862031T, 862031, 862031T1\u003c\/li\u003e\n\u003cli\u003eAPI Marine 20099\u003c\/li\u003e\n\u003cli\u003eArco 20800\u003c\/li\u003e\n\u003cli\u003eDaewoo 219232\u003c\/li\u003e\n\u003cli\u003eDelco 19020601, 19020609\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-6293 alternator replace?\u003c\/strong\u003e The 18-6293 directly replaces Mercury Marine 862031T, 862031, and 862031T1, as well as API Marine 20099, Arco 20800, Daewoo 219232, and Delco 19020601 and 19020609.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-6293 a 12 volt or 24 volt alternator?\u003c\/strong\u003e It is a 12-volt, 70-amp alternator, sized for standard 12V stern drive charging systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-6293 fit?\u003c\/strong\u003e This alternator fits MerCruiser 454 Mag. MPI (serial number L010029 and up), 454 Mag. MPI MIE (serial number L002200 and up), and 502 Mag. MPI (serial number L017000 and up) GM V-8 engines, all from 1998 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the mounting stud on this alternator?\u003c\/strong\u003e The 18-6293 uses an M8-1.25 mounting stud.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pulley does the 18-6293 use?\u003c\/strong\u003e A 6-groove serpentine pulley with a 2.44 inch diameter is fitted to this alternator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the alternator internally or externally fanned?\u003c\/strong\u003e The Sierra 18-6293 has an internal fan design, matching the 7-SI style hinge mount configuration it uses.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-6293 alternator weigh and what are its dimensions?\u003c\/strong\u003e It weighs 9.5 pounds and measures approximately 7.5 x 7.5 x 7.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-6293 come tested before shipping?\u003c\/strong\u003e Yes, every 18-6293 alternator is 100% load tested at the factory for assured reliability out of the box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size are the mounting holes?\u003c\/strong\u003e The 18-6293 has 8mm unthreaded mounting holes as part of its hinge mount design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-6293 genuine OEM or an aftermarket part?\u003c\/strong\u003e It is a Sierra-manufactured marine alternator engineered to meet or exceed the performance of the original equipment part it replaces, including USCG, SAE J1171, and ISO 8846 standards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-6293 be used on both 454 Mag. MPI and 502 Mag. MPI engines?\u003c\/strong\u003e Yes, the same 18-6293 alternator is listed for MerCruiser 454 Mag. MPI, 454 Mag. MPI MIE, and 502 Mag. MPI GM V-8 engines from 1998 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-6293 alternator have?\u003c\/strong\u003e It has a machined exterior finish.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988356280539,"sku":"SIE-18-6293","price":226.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-6293__63763.1722381270.500.750.jpg?v=1785188319"},{"product_id":"sierra-18-6408-marine-alternator-105-amp-for-mercruiser-engines","title":"Sierra 18-6408 Marine Alternator - 105 Amp for Mercruiser Applications","description":"\u003cp\u003eThe Sierra 18-6408 is a 105 amp marine alternator built for Mercruiser applications. It replaces a worn or failed alternator to restore reliable charging output for the battery and onboard electrical systems, keeping ignition, electronics, and accessories powered while underway. The housing features a machined exterior finish, and the unit measures 8 x 8 x 7 inches and weighs 9.3 pounds.\u003c\/p\u003e\u003cp\u003eAs a Sierra branded part, the 18-6408 is manufactured to work as a direct fit within Mercruiser electrical systems, making it a straightforward swap for boat owners and marine technicians performing a charging system repair or upgrade. Its 105 amp output supports demanding onboard electrical loads, making it a solid choice for boats that run additional electronics, lighting, or accessories alongside standard engine and helm systems.\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 18-6408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Alternator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 105 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 9.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 8 x 8 x 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282378905\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Mercruiser alternator applications.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat amperage does the Sierra 18-6408 alternator produce?\u003c\/strong\u003e The Sierra 18-6408 is rated at 105 amps, providing charging output for the boat's battery and electrical systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the part number for this Sierra alternator?\u003c\/strong\u003e The part number is 18-6408, a Sierra branded marine alternator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat boats or engines is the 18-6408 alternator designed for?\u003c\/strong\u003e This alternator is designed for Mercruiser applications, making it suited to boats running Mercruiser powertrains that need a 105 amp charging unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-6408 alternator weigh?\u003c\/strong\u003e It weighs 9.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-6408 alternator?\u003c\/strong\u003e The unit measures 8 x 8 x 7 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the alternator housing have?\u003c\/strong\u003e The Sierra 18-6408 has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-6408 a genuine Sierra part?\u003c\/strong\u003e Yes, the 18-6408 is a genuine Sierra branded 105 amp marine alternator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-6408 alternator?\u003c\/strong\u003e The UPC for this Sierra alternator is 808282378905.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-6408 alternator handle extra onboard electronics?\u003c\/strong\u003e With a 105 amp rating, the Sierra 18-6408 supports demanding electrical loads from additional electronics, lighting, or accessories on Mercruiser powered boats.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when purchasing the 18-6408?\u003c\/strong\u003e The purchase includes the Sierra 18-6408 alternator unit itself, part number 18-6408.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988356378843,"sku":"SIE-18-6408","price":304.73,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-6408__22332.1722351226.500.750.jpg?v=1785189184"},{"product_id":"sierra-18-6298-marine-alternator-70a-12v-replaces-mercury-863077t-7si-serpentine-pulley-1-97-in-for-mercruiser","title":"Sierra Alternator 18-6298 - 70A 12V for MerCruiser 600 SCI GM V-8 2005-2010","description":"\u003cp\u003eThe Sierra 18-6298 is a 70-amp, 12-volt marine alternator engineered to maintain proper charging levels on inboard and sterndrive engines. It is marine grade, built with heavy-duty bearings and an internal regulator for a longer service life in the harsh marine environment, and it contains high quality stators and heavy-duty rectifiers for maximum charging efficiency. Every Sierra alternator meets or exceeds USCG, SAE J1171, and ISO 8846 safety standards and is 100% load tested before it ships, so it is ready to install and run right out of the box.\u003c\/p\u003e\u003cp\u003eThis alternator uses an internal fan and negative polarity, with an M6-1.0 stud size and a 6-groove, 1.97 inch diameter serpentine pulley on a hinge mount, 7-SI style bracket configuration. It fits MerCruiser 600 SCI models with GM V-8 engines, serial number M952908 and up. It is backed by Sierra's customer satisfaction warranty.\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 18-6298\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 70A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFan Type:\u003c\/strong\u003e Internal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegulator Type:\u003c\/strong\u003e Internal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolarity:\u003c\/strong\u003e Negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Size:\u003c\/strong\u003e M6-1.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Type:\u003c\/strong\u003e 6-Groove, 1.97 inch Diameter Serpentine Pulley\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type:\u003c\/strong\u003e Hinge Mount, 7-SI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 9.4 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282187385\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser 600 SCI, GM V-8, 2005-2010, serial number M952908 and up\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 863077T\u003c\/li\u003e\n\u003cli\u003eMercury Marine 863077-1\u003c\/li\u003e\n\u003cli\u003eArco 20815\u003c\/li\u003e\n\u003cli\u003eDelco 19020611\u003c\/li\u003e\n\u003cli\u003eDelco 19020612\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-6298 alternator fit?\u003c\/strong\u003e The Sierra 18-6298 fits MerCruiser 600 SCI models with GM V-8 engines, serial number M952908 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-6298 alternator replace?\u003c\/strong\u003e It replaces Mercury Marine 863077T and 863077-1, Arco 20815, and Delco 19020611 and 19020612, making the Sierra 18-6298 a direct equivalent for those part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the amperage and voltage output of this alternator?\u003c\/strong\u003e The Sierra 18-6298 is a 12-volt alternator rated at 70 amps, with an internal regulator and internal fan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-6298 alternator weigh?\u003c\/strong\u003e This alternator weighs 9.4 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size pulley does the 18-6298 alternator use?\u003c\/strong\u003e It has a 6-groove serpentine pulley with a 1.97 inch diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this alternator positive or negative ground?\u003c\/strong\u003e The Sierra 18-6298 is negative polarity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size are the mounting studs on the 18-6298?\u003c\/strong\u003e The stud size is M6-1.0.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-6298 tested before shipping?\u003c\/strong\u003e Yes, every Sierra 18-6298 alternator is 100% load tested for assured reliability before it leaves the factory.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-6298 meet marine safety standards?\u003c\/strong\u003e Yes, it meets or exceeds USCG, SAE J1171, and ISO 8846 safety standards, the standard benchmarks for marine electrical components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat kind of mount does the 18-6298 alternator use?\u003c\/strong\u003e It uses a hinge mount, 7-SI style bracket configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-6298 covered by a warranty?\u003c\/strong\u003e Yes, the 18-6298 is covered under Sierra's customer satisfaction warranty as part of its standard product line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-6298 a genuine OEM part or aftermarket?\u003c\/strong\u003e The 18-6298 is a Sierra-manufactured marine replacement alternator, engineered to meet or exceed the original equipment it replaces such as Mercury Marine 863077T and 863077-1.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988357427419,"sku":"SIE-18-6298","price":255.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-6298__03338.1739458889.500.750.jpg?v=1785188715"},{"product_id":"rectifier-regulator-35-amp-for-johnson-evinrude-outboards-sierra-18-99394","title":"Sierra Regulator\/Rectifier 18-99394, 35-Amp, for Johnson Evinrude Outboards","description":"\u003cp\u003eThe Sierra 18-99394 is a 35-amp regulator\/rectifier built for Johnson and Evinrude outboard charging systems. It converts the raw AC output from the outboard's stator into regulated DC current, protecting the battery and onboard electronics from overcharging while keeping the charging voltage within a safe, consistent range. As the charging system ages, a failing regulator\/rectifier is one of the most common causes of a battery that will not hold a charge, erratic voltage readings, or a battery that overcharges and boils dry, and replacing this component restores proper charging output.\u003c\/p\u003e\u003cp\u003eThis unit is designed as a direct-fit replacement for the applicable Johnson Evinrude outboard charging system, mounting in place of the factory regulator\/rectifier using the existing mounting points and wiring. It is a straightforward maintenance-level replacement for anyone servicing an aging or underperforming charging circuit on a Johnson or Evinrude outboard.\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 18-99394\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Rectifier Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 35 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Regulator\/Rectifier (AC to regulated DC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394271\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Johnson and Evinrude outboard engines.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99394 regulator\/rectifier do?\u003c\/strong\u003e It converts the AC current produced by a Johnson or Evinrude outboard's stator into regulated DC current, controlling charging voltage so the battery charges properly without being overcharged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-99394 fit?\u003c\/strong\u003e The Sierra 18-99394 is designed for Johnson and Evinrude outboard engines equipped with a 35-amp charging system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many amps does this regulator\/rectifier handle?\u003c\/strong\u003e It is rated for 35 amps of charging output.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99394 weigh?\u003c\/strong\u003e The Sierra 18-99394 regulator\/rectifier weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of a failing regulator\/rectifier?\u003c\/strong\u003e A weak or dying battery, overcharging that boils battery fluid, erratic voltage readings, or a battery that will not hold a charge are common signs the regulator\/rectifier on a Johnson or Evinrude outboard needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99394 a direct replacement for the factory unit?\u003c\/strong\u003e Yes, the Sierra 18-99394 is designed to mount in place of the original Johnson Evinrude regulator\/rectifier using the existing mounting points and wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install this regulator\/rectifier myself?\u003c\/strong\u003e Installation is a standard maintenance-level task involving disconnecting the old unit's wiring, mounting the Sierra 18-99394 in the same location, and reconnecting the charging circuit wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99394 include mounting hardware?\u003c\/strong\u003e The dossier for the Sierra 18-99394 does not specify included mounting hardware; confirm hardware needs against your existing charging system components before installing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between a regulator and a rectifier?\u003c\/strong\u003e The Sierra 18-99394 combines both functions in one unit: the rectifier converts AC output from the stator into DC, and the regulator controls that DC output to a safe, consistent voltage for charging the battery.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99394 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99394 is the Sierra manufacturer part number for this Johnson Evinrude regulator\/rectifier.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442362075,"sku":"SIE-18-99394","price":285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-6048_lg__22060.1753365177.500.750.jpg?v=1785329180"},{"product_id":"sierra-18-99407-voltage-regulator-for-johnson-evinrude-120-140-hp-replaces-oem-582907-10-amp-1985-2001","title":"Sierra Voltage Regulator 18-99407, Replaces Johnson\/Evinrude 584205, Fits 120-140 HP 4-Cylinder Outboards 1985-2001","description":"\u003cp\u003eThe Sierra Voltage Regulator 18-99407 is a 10-amp voltage regulator built for 4-cylinder Johnson\/Evinrude loop charged outboard engines. It manages charging system output from the engine's stator to the battery, protecting the electrical system from overcharging while keeping onboard batteries properly topped off during operation. This regulator is designed as a direct fit for 120, 125, 130, 135, and 140 HP loop charged outboards built between 1985 and 2001, and it cross-references to several original Johnson\/Evinrude part numbers, making it a straightforward replacement when an original regulator has failed or is showing signs of erratic charging performance.\u003c\/p\u003e\u003cp\u003eVoltage regulators are a common failure point on aging outboards, often showing up as a battery that will not hold a charge, a battery that overcharges and boils dry, or inconsistent gauge and accessory power. Replacing a worn unit with the 18-99407 restores predictable charging output without the cost of tracking down a used or discontinued OEM part. The regulator ships ready to install using the factory mounting and wiring configuration for the applicable engine.\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 18-99407\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 10 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Configuration:\u003c\/strong\u003e 4 Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 7.72 x 4.69 x 2.52 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394387\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude loop charged outboards, 120, 125, 130, 135, and 140 HP (1985-2001)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e584205\u003c\/li\u003e\n\u003cli\u003e583512\u003c\/li\u003e\n\u003cli\u003e582907\u003c\/li\u003e\n\u003cli\u003e584675\u003c\/li\u003e\n\u003cli\u003e585192\u003c\/li\u003e\n\u003cli\u003e878332\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99407 voltage regulator fit?\u003c\/strong\u003e The Sierra 18-99407 fits Johnson\/Evinrude loop charged outboards rated 120, 125, 130, 135, and 140 HP built from 1985 to 2001.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a 4-cylinder or 6-cylinder voltage regulator?\u003c\/strong\u003e The 18-99407 is built for 4-cylinder Johnson\/Evinrude loop charged outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat amperage is the 18-99407 rated for?\u003c\/strong\u003e This regulator is rated at 10 amps, matching the output of the Johnson\/Evinrude charging systems it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich original Johnson\/Evinrude part numbers does 18-99407 replace?\u003c\/strong\u003e It replaces OEM numbers 584205, 583512, 582907, 584675, 585192, and 878332.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99407 voltage regulator weigh?\u003c\/strong\u003e The regulator weighs 0.8 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-99407?\u003c\/strong\u003e It ships in a package measuring 7.72 x 4.69 x 2.52 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this regulator work with a 6-cylinder Johnson\/Evinrude outboard?\u003c\/strong\u003e No, the 18-99407 is designed for 4-cylinder loop charged Johnson\/Evinrude outboards in the 120-140 HP range, not 6-cylinder models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my outboard's voltage regulator has failed?\u003c\/strong\u003e Common symptoms include a battery that will not hold a charge, a battery that overcharges or boils dry, or inconsistent electrical accessory performance; the 18-99407 addresses these issues on applicable Johnson\/Evinrude engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99407 use the factory wiring and mounting?\u003c\/strong\u003e Yes, it is designed to install using the factory mounting and wiring configuration for the applicable Johnson\/Evinrude engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99407 a new part or remanufactured?\u003c\/strong\u003e The 18-99407 is supplied as a new replacement voltage regulator, not a remanufactured or used unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat year range of outboards does this regulator cover?\u003c\/strong\u003e Coverage is for Johnson\/Evinrude 120-140 HP loop charged outboards built in the 1985 to 2001 range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I cross-reference this part using an old Johnson\/Evinrude regulator number?\u003c\/strong\u003e Yes, if your old regulator is stamped 584205, 583512, 582907, 584675, 585192, or 878332, the Sierra 18-99407 is the corresponding replacement.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442689755,"sku":"SIE-18-99407","price":110.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-4205_lg__67279.1558112772.500.750.jpg?v=1785188014"},{"product_id":"voltage-regulator-for-johnson-evinrude-outboard-replaces-583529-10-amp-fits-65-235-hp-cross-flow-1984-1998","title":"Sierra Voltage Regulator 18-99404, 10 Amp, Replaces Johnson\/Evinrude 584204 for 4\/6 Cylinder Cross Flow Outboards","description":"\u003cp\u003eThe Sierra 18-99404 is a 10 amp voltage regulator built for Johnson\/Evinrude outboard ignition systems. It regulates charging output from the outboard's stator\/alternator to protect the battery and onboard electronics from overcharging, replacing the OEM regulator on applicable Johnson\/Evinrude Cross Flow engines. The unit is a direct cross reference for the OEM regulators used across a wide range of Johnson\/Evinrude 4 cylinder and 6 cylinder Cross Flow powerheads, making it a straightforward like-for-like replacement when an original regulator fails or begins overcharging the battery.\u003c\/p\u003e\u003cp\u003eThis regulator supports 4 cylinder Cross Flow engines rated 65 JET, 80 JET, 85, 88, 90, 100, 112, 115, and 140 HP, as well as 6 cylinder Cross Flow engines rated 150, 155, 185, and 235 HP. It is designed as a bolt-in replacement for the OEM part, restoring proper charging system regulation without modification to the existing wiring harness.\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 18-99404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 10 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394356\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson\/Evinrude Outboard Ignition System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Compatibility:\u003c\/strong\u003e 4 Cylinder and 6 Cylinder Cross Flow Engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 4 Cylinder Cross Flow: 65 JET, 80 JET, 85, 88, 90, 100, 112, 115, 140 HP (1984-1998)\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 6 Cylinder Cross Flow: 150, 155, 185, 235 HP (1984-1990)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e585129\u003c\/li\u003e\n\u003cli\u003e585195\u003c\/li\u003e\n\u003cli\u003e583529\u003c\/li\u003e\n\u003cli\u003e584204\u003c\/li\u003e\n\u003cli\u003e878331\u003c\/li\u003e\n\u003cli\u003e0583529\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99404 voltage regulator do?\u003c\/strong\u003e It regulates the charging current from a Johnson\/Evinrude outboard's stator or alternator so the battery and onboard electronics are not overcharged, replacing the engine's original voltage regulator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99404 a 10 amp or 6 amp regulator?\u003c\/strong\u003e The Sierra 18-99404 is rated for 10 amp charging output.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does the 18-99404 replace?\u003c\/strong\u003e It cross-references to OEM numbers 585129, 585195, 583529, 584204, 878331, and 0583529.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this regulator fit a 4 cylinder Johnson\/Evinrude Cross Flow engine?\u003c\/strong\u003e Yes, the 18-99404 fits 4 cylinder Cross Flow engines rated 65 JET, 80 JET, 85, 88, 90, 100, 112, 115, and 140 HP from 1984-1998.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99404 fit 6 cylinder Cross Flow outboards too?\u003c\/strong\u003e Yes, it also fits 6 cylinder Cross Flow engines rated 150, 155, 185, and 235 HP from 1984-1990.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99404 voltage regulator weigh?\u003c\/strong\u003e The Sierra 18-99404 weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install this voltage regulator myself?\u003c\/strong\u003e The 18-99404 is designed as a direct bolt-in replacement for the OEM Johnson\/Evinrude regulator, so it connects to the existing wiring harness without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99404 a genuine Johnson\/Evinrude part or aftermarket?\u003c\/strong\u003e The 18-99404 is a Sierra-branded regulator manufactured as a cross-reference replacement for the OEM Johnson\/Evinrude regulator, not an original Johnson\/Evinrude-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ignition system is the 18-99404 designed for?\u003c\/strong\u003e This regulator is built for the Johnson\/Evinrude outboard ignition system on applicable Cross Flow engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes replacing the voltage regulator fix an overcharging battery on an outboard?\u003c\/strong\u003e A failed or worn voltage regulator like the original equivalent to the Sierra 18-99404 is a common cause of overcharging, and replacing it restores proper charging regulation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442788059,"sku":"SIE-18-99404","price":99.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-4204_lg__77026.1722501077.500.750.jpg?v=1785188206"},{"product_id":"johnson-evinrude-35-amp-rectifier-regulator-for-outboards-sierra-18-99409","title":"Sierra Regulator\/Rectifier for Johnson Evinrude Outboard Motors, 35-Amp, 18-99409","description":"\u003cp\u003eThe Sierra 18-99409 is a 35-amp voltage regulator\/rectifier built for Johnson and Evinrude outboard motors. It is part of the charging circuit on the outboard, where it manages the electrical output from the stator so the motor's battery and onboard electronics receive properly regulated direct current at a safe, consistent amperage. A regulator\/rectifier of this type performs two jobs in one housing: it converts the alternating current generated by the outboard's stator into direct current, and it regulates that output so voltage stays within a safe range as engine RPM changes, protecting the battery and connected electrical components from overcharging.\u003c\/p\u003e\u003cp\u003eSierra produces this part as a replacement charging-system component for Johnson and Evinrude outboard applications, sized to handle a 35-amp charging load. It is cataloged under Sierra's Evinrude outboard rectifier regulator line and is built to the physical and electrical specifications needed for a direct fit in that charging system role. At 1.1 pounds, it is a compact, self-contained unit intended to mount within the outboard's electrical compartment.\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 18-99409\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Evinrude Outboard Rectifier Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson Evinrude outboard motors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 35 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394400\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson outboard motors\u003c\/li\u003e\n\u003cli\u003eEvinrude outboard motors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99409 used for?\u003c\/strong\u003e It is a voltage regulator\/rectifier for the charging system on Johnson and Evinrude outboard motors, converting the stator's AC output to regulated DC current.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat amperage does the Sierra 18-99409 regulator\/rectifier handle?\u003c\/strong\u003e The Sierra 18-99409 is rated for a 35-amp charging load.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard brands is the Sierra 18-99409 designed for?\u003c\/strong\u003e It is built for Johnson and Evinrude outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWho manufactures part number 18-99409?\u003c\/strong\u003e Sierra manufactures this regulator\/rectifier under part number 18-99409.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99409 weigh?\u003c\/strong\u003e This regulator\/rectifier weighs 1.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a regulator\/rectifier like the Sierra 18-99409 actually do?\u003c\/strong\u003e It converts the alternating current produced by the outboard's stator into direct current and regulates the voltage so the battery and electrical system are not overcharged as engine RPM varies.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99409?\u003c\/strong\u003e The UPC for this Sierra part is 808282394400.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category does the Sierra 18-99409 fall under?\u003c\/strong\u003e Sierra lists 18-99409 in its Evinrude outboard rectifier regulator category, covering charging-system components for Johnson and Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99409 an OEM Johnson or Evinrude part?\u003c\/strong\u003e No, 18-99409 is a Sierra-branded replacement part made for Johnson and Evinrude outboard charging systems.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442951899,"sku":"SIE-18-99409","price":354.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-4641_lg__02823.1558113028.500.750.jpg?v=1785329181"},{"product_id":"voltage-regulator-for-johnson-evinrude-25-70-hp-40-50-hp-outboards-10-amp-replaces-oem-584476-sierra-18-99412","title":"Sierra 18-99412 Johnson\/Evinrude Voltage Regulator, 10 Amp, Replaces 584476, 585001","description":"\u003cp\u003eThe Sierra 18-99412 is a 10 amp voltage regulator built for Johnson\/Evinrude outboard engines. It manages charging system voltage output from the engine's alternator\/stator, protecting the battery and onboard electronics from overcharging while maintaining consistent electrical performance. The housing is aluminum, providing durability and heat dissipation in the marine engine compartment where the regulator is mounted.\u003c\/p\u003e\u003cp\u003eThis regulator is a direct fit for Johnson\/Evinrude 2, 3, and 4 cylinder outboard engines across a range of horsepower ratings, including 2 cylinder models with a three-wire trigger, 3 cylinder models using the S.L.O.W. (Speed Limiting Overheat Warning) system, and the 4 cylinder 4-stroke 60 degree engine. It replaces OEM part numbers 584476 and 585001, making it a straightforward swap for boat owners repairing a failed or degraded factory regulator. At 0.6 pounds, it is a compact, lightweight component that mounts to the engine using the factory hardware locations.\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 18-99412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 10 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Transom Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Type:\u003c\/strong\u003e 4 Stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Equivalent Part Number:\u003c\/strong\u003e 584476, 585001\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394431\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 40 and 50 HP (2 cylinder with three-wire trigger), 1992-2005\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 25, 40, 50, 60, 65 and 70 HP (3 cylinder with S.L.O.W.), 1992-2001\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 105 HP (4 cylinder 4-stroke 60 degree engine), 2000-2001\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e584476\u003c\/li\u003e\n\u003cli\u003e585001\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99412 voltage regulator fit?\u003c\/strong\u003e The Sierra 18-99412 fits Johnson\/Evinrude 40 and 50 HP 2 cylinder outboards with a three-wire trigger, 25, 40, 50, 60, 65 and 70 HP 3 cylinder outboards using the S.L.O.W. System, and the 105 HP 4 cylinder 4-stroke 60 degree engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this regulator replace?\u003c\/strong\u003e Sierra 18-99412 replaces OEM part numbers 584476 and 585001, so it is a direct swap for either of those original Johnson\/Evinrude regulators.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many amps is the 18-99412 rated for?\u003c\/strong\u003e This regulator is rated at 10 amps, matching the output of the Johnson\/Evinrude charging systems it is designed to serve.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99412 weigh?\u003c\/strong\u003e The Sierra 18-99412 voltage regulator weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the regulator housing made of?\u003c\/strong\u003e The housing on the 18-99412 is aluminum, which helps dissipate heat and resist corrosion in the engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-99412 work on a 2 cylinder Johnson\/Evinrude engine?\u003c\/strong\u003e Yes, it is compatible with Johnson\/Evinrude 40 and 50 HP 2 cylinder engines that use a three-wire trigger.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this regulator fit 3 cylinder Johnson\/Evinrude outboards?\u003c\/strong\u003e It fits 25, 40, 50, 60, 65 and 70 HP 3 cylinder Johnson\/Evinrude engines equipped with the S.L.O.W. Speed limiting overheat warning system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99412 compatible with 4-stroke engines?\u003c\/strong\u003e Yes, it fits the 105 HP 4 cylinder 4-stroke 60 degree Johnson\/Evinrude engine in addition to the 2 and 3 cylinder applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fuel type is this regulator designed for?\u003c\/strong\u003e The Sierra 18-99412 is designed for gasoline-powered Johnson\/Evinrude outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-99412 mounted on the engine?\u003c\/strong\u003e This regulator uses a transom mount configuration on the outboard engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-99412 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99412 is the Sierra manufacturer part number for this Johnson\/Evinrude voltage regulator.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443148507,"sku":"SIE-18-99412","price":218.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-4476_lg__26386.1558112856.500.750.jpg?v=1785188253"},{"product_id":"johnson-evinrude-outboard-regulator-rectifier-35-amp-sierra-18-99405","title":"Sierra Regulator\/Rectifier for Johnson Evinrude Outboards, 35-Amp, Part 18-99405","description":"\u003cp\u003eThe Sierra 18-99405 is a 35-amp regulator\/rectifier built for Johnson Evinrude outboard motors. This component converts the AC output from the outboard's stator into regulated DC current for battery charging, while also protecting the electrical system from voltage spikes that can damage the battery or onboard electronics. As a charging-system component, it is a direct functional replacement for the regulator\/rectifier used on applicable Johnson Evinrude outboards, matching the 35-amp charging capacity required for reliable battery charging on the water.\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 18-99405\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Johnson Evinrude Regulator\/Rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 35 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Rectifier Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394363\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99405 regulator\/rectifier used for?\u003c\/strong\u003e It converts AC current from a Johnson Evinrude outboard's stator into regulated DC current for charging the battery, and it protects the electrical system from voltage spikes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many amps does the 18-99405 regulator\/rectifier handle?\u003c\/strong\u003e The Sierra 18-99405 is rated for 35 amps of charging output.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboards is the Sierra 18-99405 designed for?\u003c\/strong\u003e It is designed for Johnson Evinrude outboard motors as a regulator\/rectifier component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99405 weigh?\u003c\/strong\u003e This regulator\/rectifier weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99405?\u003c\/strong\u003e The UPC listed for the Sierra 18-99405 regulator\/rectifier is 808282394363.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a regulator\/rectifier the same as a voltage regulator?\u003c\/strong\u003e A combined regulator\/rectifier, like the Sierra 18-99405, performs two functions in one unit: it rectifies AC to DC and regulates the output voltage, rather than only regulating voltage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if a regulator\/rectifier fails on an outboard?\u003c\/strong\u003e A failed regulator\/rectifier can result in a battery that will not charge or, in some failure modes, overcharging that damages the battery and connected electronics; the Sierra 18-99405 is intended to restore proper charging function.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99405 a Sierra-brand part?\u003c\/strong\u003e Yes, part number 18-99405 is manufactured and sold under the Sierra brand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99405 include mounting hardware?\u003c\/strong\u003e The available product data does not specify included mounting hardware for the Sierra 18-99405.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category does the Sierra 18-99405 fall under?\u003c\/strong\u003e The Sierra 18-99405 is categorized as an Evinrude outboard rectifier regulator.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443181275,"sku":"SIE-18-99405","price":252.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-4093_lg__79592.1558112600.500.750.jpg?v=1785329181"},{"product_id":"voltage-regulator-rectifier-for-johnson-evinrude-150-235-hp-6-cyl-110-140-hp-4-cyl-35-amp-replaces-oem-583076-sierra-18-99399","title":"Sierra 18-99399 Voltage Regulator\/Rectifier, Replaces 583076, for Johnson\/Evinrude 4\/6 Cylinder 35 Amp Outboards","description":"\u003cp\u003eThe Sierra 18-99399 Voltage Regulator\/Rectifier is a 35 amp replacement unit built for Johnson\/Evinrude outboard charging systems. It regulates alternator output and rectifies AC current to DC to keep the battery properly charged and protect onboard electronics from voltage spikes. This unit is designed for 6-cylinder Johnson\/Evinrude outboards rated 150, 155, 175, 185, and 235 HP, as well as 4-cylinder 110, 115, and 140 HP outboards equipped with the 35 amp charging upgrade.\u003c\/p\u003e\u003cp\u003eThe regulator\/rectifier is a direct-fit replacement for the OEM part numbers listed below, so it installs using the factory wiring harness and mounting points without modification. It measures 8 x 6 x 4 inches and weighs 1.1 pounds.\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 18-99399\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Product Code:\u003c\/strong\u003e 808282394325\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Rectifier Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 35 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Brand:\u003c\/strong\u003e Johnson\/Evinrude\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Configuration:\u003c\/strong\u003e 4-Cylinder and 6-Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 8 x 6 x 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 150, 155, 175, and 185 HP (6 cylinder), 1984-1991\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 235 HP (6 cylinder), 1984-1991\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 110, 115, and 140 HP (4 cylinder with 35 Amp upgrade), 1992\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e583076\u003c\/li\u003e\n\u003cli\u003e582904\u003c\/li\u003e\n\u003cli\u003e584423\u003c\/li\u003e\n\u003cli\u003e583268\u003c\/li\u003e\n\u003cli\u003e395204\u003c\/li\u003e\n\u003cli\u003e395391\u003c\/li\u003e\n\u003cli\u003e878335\u003c\/li\u003e\n\u003cli\u003e721876\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99399 voltage regulator\/rectifier do?\u003c\/strong\u003e It regulates the alternator's output voltage and converts AC current to DC on Johnson\/Evinrude outboards, keeping the battery properly charged and protecting onboard electronics from overcharging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich Johnson\/Evinrude engines does part 18-99399 fit?\u003c\/strong\u003e It fits Johnson\/Evinrude 6-cylinder outboards rated 150, 155, 175, 185, and 235 HP from 1984-1991, and 4-cylinder 110, 115, and 140 HP outboards from 1992 equipped with the 35 amp charging upgrade.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-99399 a 35 amp or 16 amp regulator?\u003c\/strong\u003e The Sierra 18-99399 is rated at 35 amps, matching the charging output of the Johnson\/Evinrude engines it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does Sierra 18-99399 replace?\u003c\/strong\u003e Sierra 18-99399 replaces OEM numbers 583076, 582904, 584423, 583268, 395204, 395391, 878335, and 721876.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions and weight of this regulator\/rectifier?\u003c\/strong\u003e The Sierra 18-99399 measures 8 x 6 x 4 inches and weighs 1.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this unit work with a 4-cylinder Johnson\/Evinrude outboard?\u003c\/strong\u003e Yes, 18-99399 fits 4-cylinder 110, 115, and 140 HP Johnson\/Evinrude outboards from 1992 that have the 35 amp charging upgrade, in addition to the 6-cylinder applications it covers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99399 install with the factory wiring?\u003c\/strong\u003e Yes, since it is a direct replacement for the listed OEM numbers, it connects to the existing factory wiring harness and mounting points on the applicable Johnson\/Evinrude outboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-99399 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket replacement manufactured by Sierra, engineered to replace the OEM Johnson\/Evinrude numbers 583076, 582904, 584423, 583268, 395204, 395391, 878335, and 721876.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 18-99399 on a 6-cylinder 235 HP Evinrude?\u003c\/strong\u003e Yes, the 235 HP (6 cylinder) Johnson\/Evinrude outboard from 1984-1991 is a listed application for the Sierra 18-99399 regulator\/rectifier.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e You receive one Sierra 18-99399 voltage regulator\/rectifier unit, sized for direct installation on the applicable Johnson\/Evinrude outboard charging system.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443246811,"sku":"SIE-18-99399","price":224.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-5204_lg__01684.1558113423.500.750.jpg?v=1785188025"},{"product_id":"johnson-evinrude-3-wire-regulator-rectifier-replaces-153-5114-fits-5-15-hp-outboards-1993-2000-sierra-18-99416","title":"Sierra 18-99416 Johnson\/Evinrude Regulated Rectifier, Replaces 153-5114, Fits 5-15 HP 4-Stroke Outboards 1993-2000","description":"\u003cp\u003eThe Sierra 18-99416 is a regulated rectifier built as a direct replacement for Johnson and Evinrude outboard charging systems. It converts the AC output from the stator into regulated DC current to charge the battery while protecting the electrical system from voltage spikes. The unit connects using a three-wire setup with bullet and ring connectors, matching the factory wiring configuration on the engines it fits.\u003c\/p\u003e\u003cp\u003eThis rectifier regulator fits 4-stroke Johnson\/Evinrude outboards with the three-wire replacement connection: 5, 6, 8, 9.9, 10, and 15 HP models from 1993 to 2000. It is a straightforward swap for boaters whose original equipment rectifier has failed or is showing signs of weak charging output, erratic gauge readings, or a battery that will not hold a charge while running.\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 18-99416\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Rectifier Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Johnson\/Evinrude 4-stroke outboards, 5, 6, 8, 9.9, 10 and 15 HP, 1993-2000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Three-wire replacement with bullet and ring connectors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 3 x 3 x 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394479\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude 4-stroke outboards, 5, 6, 8, 9.9, 10 and 15 HP, 1993-2000\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e153-5114\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99416 rectifier regulator do?\u003c\/strong\u003e It converts AC output from the stator into regulated DC current to charge the battery, and it protects the outboard's electrical system from voltage spikes, on the Johnson\/Evinrude engines it fits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboards fit the Sierra 18-99416?\u003c\/strong\u003e Johnson\/Evinrude 4-stroke outboards with the three-wire replacement connection: 5, 6, 8, 9.9, 10, and 15 HP models from 1993 to 2000.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99416 replace part number 153-5114?\u003c\/strong\u003e Yes, the Sierra 18-99416 is a direct replacement for OEM part number 153-5114.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the Sierra 18-99416 connect to the wiring harness?\u003c\/strong\u003e It uses a three-wire replacement connection with bullet and ring connectors, matching the factory harness on compatible Johnson\/Evinrude 4-stroke outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions and weight of the Sierra 18-99416?\u003c\/strong\u003e The unit measures 3 x 3 x 3 inches and weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate my outboard's rectifier needs replacing?\u003c\/strong\u003e Weak or erratic battery charging, inconsistent gauge readings, or a battery that will not hold a charge while the engine runs are common signs the rectifier regulator, such as the Sierra 18-99416, has failed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the Sierra 18-99416 fit a 2-stroke Evinrude outboard?\u003c\/strong\u003e No, the Sierra 18-99416 is designed for 4-stroke Johnson\/Evinrude outboards using the three-wire replacement connection, in the 5 to 15 HP range for 1993 to 2000.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the Sierra 18-99416 a direct swap?\u003c\/strong\u003e Yes, since it uses the same three-wire bullet and ring connector setup as the original equipment, the Sierra 18-99416 installs as a direct replacement on compatible engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99416?\u003c\/strong\u003e The Sierra 18-99416 rectifier regulator has UPC 808282394479.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Sierra 18-99416 be used on a 9.9 HP Evinrude from the 1990s?\u003c\/strong\u003e Yes, the Sierra 18-99416 fits 9.9 HP Johnson\/Evinrude 4-stroke outboards within the 1993 to 2000 range that use the three-wire replacement connection.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443279579,"sku":"SIE-18-99416","price":96.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-5114_lg__18580.1748441111.500.750.jpg?v=1785188178"},{"product_id":"johnson-evinrude-rectifier-regulator-3-wire-replaces-oem-580841-fits-1969-2000-50-235-hp-outboards-sierra-18-99413","title":"Sierra 18-99413 Regulated Rectifier - Replaces 153-3408, 580841 - Johnson\/Evinrude 2\/3\/4\/6 Cyl 50-235 HP","description":"\u003cp\u003eThe Sierra 18-99413 is a regulated rectifier built as a direct replacement for Johnson and Evinrude outboard engines that use a rectifier-based charging system. It takes the raw AC output from the outboard's alternator\/stator, converts it to DC, and regulates the voltage so the battery is charged correctly without being overcharged or damaged. This is a core charging-system component, and a failed or unregulated rectifier is one of the most common causes of a marine battery that will not hold a charge or an engine that runs down its battery over time.\u003c\/p\u003e\u003cp\u003eSierra 18-99413 is built with a metal housing for heat dissipation and durability in the marine engine compartment, and is designed as a straightforward swap for the outboard charging systems it is intended to service. It covers a wide span of Johnson\/Evinrude outboards across 2, 3, 4, and 6 cylinder configurations, making it a common shelf item for shops and owners servicing older outboard charging systems.\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 18-99413\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation Mode:\u003c\/strong\u003e Electric\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\u003eMaximum Horsepower:\u003c\/strong\u003e 235 horsepower\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394448\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude outboards, 2\/3\/4\/6 cylinder, 1969-2000, 50 to 235 HP (rectifier-equipped charging systems only)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e153-3408\u003c\/li\u003e\n\u003cli\u003e580841\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99413 rectifier do?\u003c\/strong\u003e It converts the AC output from a Johnson\/Evinrude outboard's stator into regulated DC current, charging the battery correctly while protecting it from overcharging. Part number 18-99413 is a direct fit for outboards using a rectifier-based charging system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does the 18-99413 fit?\u003c\/strong\u003e Sierra 18-99413 fits Johnson\/Evinrude outboards from 50 to 235 HP across 2, 3, 4, and 6 cylinder configurations, covering engines built from 1969 through 2000 that use a rectifier (not an alternator with a separate voltage regulator).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-99413 the same as part number 153-3408 or 580841?\u003c\/strong\u003e Yes, the Sierra 18-99413 is a cross-reference equivalent for OEM\/aftermarket numbers 153-3408 and 580841, so it can be used as a direct replacement for engines calling for either of those part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the rectifier weigh?\u003c\/strong\u003e The Sierra 18-99413 regulated rectifier weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the rectifier housing made of?\u003c\/strong\u003e It has a metal housing, which helps dissipate the heat generated during the AC-to-DC conversion and voltage regulation process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-99413 installed?\u003c\/strong\u003e It is an engine-mount component that installs in place of the existing rectifier on compatible Johnson\/Evinrude outboards, wiring into the existing charging circuit; always confirm your engine uses a rectifier-only charging system before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this work on an engine with a separate alternator and voltage regulator?\u003c\/strong\u003e No. The Sierra 18-99413 is designed for engines using a rectifier only; it is not intended for charging systems that use a separate alternator and regulator setup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate the rectifier needs to be replaced?\u003c\/strong\u003e A battery that will not hold a charge, runs down during use, or shows erratic charging voltage is a common sign of a failing rectifier on Johnson\/Evinrude outboards in the 50-235 HP range that 18-99413 services.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99413 include mounting hardware?\u003c\/strong\u003e The listing covers the regulated rectifier unit itself, part number 18-99413; confirm hardware needs against your specific engine before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e Sierra 18-99413 is sold under the Sierra part number and functions as a cross-reference replacement for OEM numbers 153-3408 and 580841 on applicable Johnson\/Evinrude outboards.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443377883,"sku":"SIE-18-99413","price":94.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-3408_lg__40697.1748376103.500.750.jpg?v=1785188026"},{"product_id":"voltage-regulator-rectifier-for-johnson-evinrude-175-300-hp-outboards-replaces-586000-35-amp-sierra-18-99424","title":"Sierra Voltage Regulator\/Rectifier 18-99424, 35 Amp, Replaces 586000, Fits Johnson\/Evinrude 175-300 HP 6\/8 Cylinder","description":"\u003cp\u003eThe Sierra 18-99424 is a 35 amp voltage regulator\/rectifier built for Johnson and Evinrude outboard engines. It manages the output from the engine's charging system, converting alternating current to direct current and regulating voltage to protect the battery and onboard electronics from overcharging. This is a direct-fit replacement for the factory regulator\/rectifier used on Johnson\/Evinrude 6-cylinder and 8-cylinder outboards, restoring reliable charging performance on engines whose original unit has failed or is showing signs of erratic charging, battery drain, or no-charge conditions.\u003c\/p\u003e\u003cp\u003eThe unit is a factory-style form and mounts using the original attachment points on compatible engines, letting it swap in for the OEM part without modification. It weighs 1 pound, making it a straightforward drop-in replacement for anyone comfortable with basic marine electrical work.\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 18-99424\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Voltage Regulator\/Rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 35 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 7.68 x 5.39 x 3.35 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 736983852892\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 586000, 586272, 583266, 583689, 584424, 878334\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 175, 185, 200 and 225 HP (6 cylinder) outboards, 1986-1992\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 250, 275 and 300 HP (8 cylinder) outboards, 1985-1992\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e586000\u003c\/li\u003e\n\u003cli\u003e586272\u003c\/li\u003e\n\u003cli\u003e583266\u003c\/li\u003e\n\u003cli\u003e583689\u003c\/li\u003e\n\u003cli\u003e584424\u003c\/li\u003e\n\u003cli\u003e878334\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99424 voltage regulator\/rectifier do?\u003c\/strong\u003e It converts the alternating current produced by the outboard's charging system into direct current and regulates the voltage sent to the battery, preventing overcharging and protecting onboard electronics on Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard engines does the 18-99424 fit?\u003c\/strong\u003e It fits Johnson\/Evinrude 175, 185, 200 and 225 HP 6-cylinder outboards from 1986-1992, and Johnson\/Evinrude 250, 275 and 300 HP 8-cylinder outboards from 1985-1992.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-99424 replace?\u003c\/strong\u003e The Sierra 18-99424 replaces OEM numbers 586000, 586272, 583266, 583689, 584424 and 878334.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99424 a direct OEM replacement or an aftermarket part?\u003c\/strong\u003e It is an aftermarket voltage regulator\/rectifier manufactured to replace the listed OEM part numbers on Johnson\/Evinrude engines, functioning as a direct swap for the original unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99424 regulator\/rectifier weigh?\u003c\/strong\u003e The Sierra 18-99424 weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-99424?\u003c\/strong\u003e Package dimensions for this regulator\/rectifier are 7.68 x 5.39 x 3.35 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat amperage rating does the 18-99424 have?\u003c\/strong\u003e It is rated at 35 amps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99424 fit a 4-cylinder Johnson\/Evinrude outboard?\u003c\/strong\u003e No, the fitment covers 6-cylinder 175-225 HP models (1986-1992) and 8-cylinder 250-300 HP models (1985-1992); it is not listed as fitting 4-cylinder engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99424 include mounting hardware?\u003c\/strong\u003e The listing covers the voltage regulator\/rectifier unit itself; no additional accessories are specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-99424 to fix a no-charge or battery drain issue on my outboard?\u003c\/strong\u003e Yes, a failed voltage regulator\/rectifier is a common cause of no-charge or erratic charging symptoms, and the 18-99424 is designed to replace the original unit on compatible Johnson\/Evinrude engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99424?\u003c\/strong\u003e The UPC for this product is 736983852892.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443508955,"sku":"SIE-18-99424","price":269.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-3689_lg__44422.1558112518.500.750.jpg?v=1785188050"},{"product_id":"universal-rectifier-20-amp-for-chrysler-force-sears-gamefinder-outboard-replaces-650450-617450-fits-9-9-140-hp-1975-1992-sierra-18-99429","title":"Sierra Universal Rectifier 18-99429 - 20 Amp - Replaces 474470, 650450, 617450 - Fits 2\/3\/4 Cylinder Outboards","description":"\u003cp\u003eThe Sierra 18-99429 is a 20 amp universal rectifier engineered as a direct replacement for the charging system on 2, 3, and 4 cylinder outboard engines. The rectifier converts the AC output from the outboard's stator into DC current to charge the battery, making it a critical component for reliable electrical system operation. It is built as a drop-in replacement covering a wide range of outboard applications, cross-referencing to numerous OEM part numbers so boaters can find the correct replacement using either the original engine manufacturer's number or the Sierra part number 18-99429.\u003c\/p\u003e\u003cp\u003eThis rectifier is compatible with 2 cylinder outboards from 9.9 to 50 HP, 3 cylinder outboards from 50 to 90 HP, and 4 cylinder outboards from 100 to 140 HP. It is a straightforward bolt-in replacement for a failed or underperforming rectifier, restoring proper charging output and preventing battery drain or overcharging caused by a degraded unit. Compact and lightweight at 0.1 pounds, it is sized to fit within the existing mounting location on the outboard's electrical panel without modification.\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 18-99429\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 20 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 2 x 2 x 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394608\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Chrysler Outboard Electrical System\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 cylinder outboards, 9.9 to 50 HP, 1975-1992\u003c\/li\u003e\n\u003cli\u003e3 cylinder outboards, 50 to 90 HP, 1975-1985\u003c\/li\u003e\n\u003cli\u003e4 cylinder outboards, 100 to 140 HP, 1976-1989\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e474470\u003c\/li\u003e\n\u003cli\u003e650450\u003c\/li\u003e\n\u003cli\u003e510450-1\u003c\/li\u003e\n\u003cli\u003e617450\u003c\/li\u003e\n\u003cli\u003e87-F650450\u003c\/li\u003e\n\u003cli\u003eFA617450\u003c\/li\u003e\n\u003cli\u003eFA650450\u003c\/li\u003e\n\u003cli\u003eF475470\u003c\/li\u003e\n\u003cli\u003eF510450\u003c\/li\u003e\n\u003cli\u003eF510450-1\u003c\/li\u003e\n\u003cli\u003eF404470\u003c\/li\u003e\n\u003cli\u003eF404470-1\u003c\/li\u003e\n\u003cli\u003eF617450\u003c\/li\u003e\n\u003cli\u003eF650450\u003c\/li\u003e\n\u003cli\u003eF684450\u003c\/li\u003e\n\u003cli\u003eF684458\u003c\/li\u003e\n\u003cli\u003eFK650450\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99429 rectifier do?\u003c\/strong\u003e It converts the AC output from an outboard engine's stator into DC current to charge the battery, and is rated for 20 amp output.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat outboard engines is the 18-99429 rectifier compatible with?\u003c\/strong\u003e It fits 2 cylinder outboards from 9.9 to 50 HP built 1975-1992, 3 cylinder outboards from 50 to 90 HP built 1975-1985, and 4 cylinder outboards from 100 to 140 HP built 1976-1989.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99429 a direct OEM replacement?\u003c\/strong\u003e Yes, part number 18-99429 is designed as a direct replacement, cross-referencing to OEM numbers including 474470, 650450, 617450, and 510450-1 among others.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-99429 replace?\u003c\/strong\u003e It replaces 474470, 650450, 510450-1, 617450, 87-F650450, FA617450, FA650450, F475470, F510450, F510450-1, F404470, F404470-1, F617450, F650450, F684450, F684458, and FK650450.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99429 rectifier weigh?\u003c\/strong\u003e The Sierra 18-99429 rectifier weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-99429 rectifier?\u003c\/strong\u003e It measures approximately 2 x 2 x 2 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this rectifier work on a 3 cylinder outboard?\u003c\/strong\u003e Yes, the 18-99429 covers 3 cylinder outboards from 50 to 90 HP built 1975-1985.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99429 rectifier require any modification to install?\u003c\/strong\u003e No, it is a bolt-in replacement sized to fit the existing rectifier mounting location on compatible outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a mounting bracket or hardware included with the 18-99429?\u003c\/strong\u003e The rectifier itself is the unit supplied under part number 18-99429; no additional components beyond the rectifier are specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the amperage rating of the Sierra 18-99429?\u003c\/strong\u003e The 18-99429 is rated at 20 amps.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443967707,"sku":"SIE-18-99429","price":55.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-152-9209_lg__49596.1558111722.500.750.jpg?v=1785188083"},{"product_id":"johnson-evinrude-voltage-regulator-rectifier-20-amp-sierra-18-99436-outboard-rectifier","title":"Sierra Voltage Regulator\/Rectifier 18-99436 for Johnson\/Evinrude Outboards, 20-Amp, Cross-References CDI Electronics 193-4847","description":"\u003cp\u003eThe Sierra 18-99436 is a 20-amp voltage regulator\/rectifier engineered for Johnson and Evinrude outboard motors. It manages the outboard's charging system by converting the alternating current produced by the stator into direct current and regulating output voltage to protect the battery and onboard electronics from overcharging. As a direct-fit electrical component, it is a straightforward swap for a failed or worn factory regulator\/rectifier, restoring reliable charging performance without rewiring the ignition or charging harness.\u003c\/p\u003e\u003cp\u003eThis unit is built to handle the 20-amp charging demand common to Johnson\/Evinrude outboard charging systems, making it suitable for boaters who need dependable voltage control to keep batteries properly charged during operation. It corresponds to CDI Electronics part number 193-4847, giving buyers a clear cross-reference point when searching for the correct replacement.\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 18-99436\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Voltage Regulator\/Rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 20 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson\/Evinrude Outboard Motors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394677\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Johnson and Evinrude outboard motors requiring a 20-amp voltage regulator\/rectifier.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eCDI Electronics 193-4847\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99436 used for?\u003c\/strong\u003e It is a voltage regulator\/rectifier that converts the alternating current from a Johnson or Evinrude outboard's stator into direct current and regulates charging voltage to protect the battery and electronics.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat amperage does this regulator\/rectifier support?\u003c\/strong\u003e The Sierra 18-99436 is rated for 20 amps of charging output.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99436 fit Johnson and Evinrude outboards?\u003c\/strong\u003e Yes, this regulator\/rectifier is built for Johnson and Evinrude outboard motors that use a 20-amp charging system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-99436 the same as CDI Electronics 193-4847?\u003c\/strong\u003e Sierra 18-99436 cross-references to CDI Electronics part number 193-4847, so either number identifies a compatible unit for the same application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this part weigh?\u003c\/strong\u003e The Sierra 18-99436 voltage regulator\/rectifier weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99436?\u003c\/strong\u003e The UPC for this Johnson\/Evinrude voltage regulator\/rectifier is 808282394677.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this replace a failed factory voltage regulator?\u003c\/strong\u003e Yes, the Sierra 18-99436 is intended as a direct replacement for a worn or failed voltage regulator\/rectifier on compatible Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if a voltage regulator\/rectifier fails on an outboard?\u003c\/strong\u003e A failed regulator\/rectifier like the one the Sierra 18-99436 replaces can cause overcharging or undercharging of the battery, leading to battery damage or electrical system issues.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, part number 18-99436 is a Sierra brand voltage regulator\/rectifier.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99436 include mounting hardware?\u003c\/strong\u003e The listing covers the voltage regulator\/rectifier unit itself, identified by Sierra part number 18-99436.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444098779,"sku":"SIE-18-99436","price":285.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-193-4847_lg__62936.1558113122.500.750.jpg?v=1785188050"},{"product_id":"voltage-regulator-for-mercury-mariner-outboard-135-225-hp-1981-1993-6-cyl-16-amp-replaces-88825a1-sierra-18-99434","title":"Sierra Voltage Regulator 18-99434 for Mercury 135-225 HP 6-Cylinder Outboards 1981-1993, Replaces 88825A7","description":"\u003cp\u003eThe Sierra 18-99434 is a 16-amp voltage regulator built for 6-cylinder Mercury outboard engines. It regulates charging output to the battery, protecting the electrical system from overcharging while keeping the battery topped off during operation. The regulator is housed in a waterproof plastic enclosure finished in black, designed to withstand the marine environment where it is mounted on the outboard.\u003c\/p\u003e\u003cp\u003eElectrically, the unit outputs 12 volts DC at up to 16 amps and connects to the existing engine harness through a 2-pin connector, making it a straightforward swap for a failed or worn regulator. It is built to fit Mercury outboard engines rated 135, 150, 175, 200, and 225 HP from 1981-1993, and is a direct replacement for the OEM Mercury voltage regulators it supersedes.\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 18-99434\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Voltage Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Cylinder Configuration:\u003c\/strong\u003e 6-Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 16 Amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Voltage:\u003c\/strong\u003e 12 Volts (DC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e 2-Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial Feature:\u003c\/strong\u003e Waterproof\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394653\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury outboard engines, 135, 150, 175, 200, and 225 HP, 1981-1993, 6-cylinder\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e194-8825K1\u003c\/li\u003e\n\u003cli\u003e88825A1\u003c\/li\u003e\n\u003cli\u003e88825A7\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99434 voltage regulator fit?\u003c\/strong\u003e It fits Mercury outboard engines rated 135, 150, 175, 200, and 225 HP from 1981-1993, and is built for 6-cylinder configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99434 replace OEM part 88825A7?\u003c\/strong\u003e Yes, the 18-99434 is a direct replacement for OEM Mercury voltage regulators 194-8825K1, 88825A1, and 88825A7.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the amperage output of this voltage regulator?\u003c\/strong\u003e The Sierra 18-99434 delivers a 16-amp charging output to the battery.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat voltage does the 18-99434 regulator put out?\u003c\/strong\u003e It outputs 12 volts DC, matching standard marine 12-volt charging systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99434 waterproof?\u003c\/strong\u003e Yes, it is built with a waterproof housing suited to the marine environment it operates in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the housing material and color of the 18-99434?\u003c\/strong\u003e The regulator has a black plastic enclosure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99434 voltage regulator weigh?\u003c\/strong\u003e It weighs 0.8 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of connector does this voltage regulator use?\u003c\/strong\u003e The 18-99434 uses a 2-pin connector that plugs into the existing engine wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99434 fit a 4-cylinder Mercury outboard?\u003c\/strong\u003e No, this regulator is designed for 6-cylinder Mercury outboard engines in the 135-225 HP range from 1981-1993, not 4-cylinder models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99434 equivalent to the OEM Mercury regulator?\u003c\/strong\u003e Yes, the 18-99434 is a direct-fit equivalent to OEM Mercury regulators 194-8825K1, 88825A1, and 88825A7, offering the same 16-amp, 12-volt output.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444262619,"sku":"SIE-18-99434","price":241.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-194-8825K1_lg__51674.1594925206.500.750.jpg?v=1785188459"},{"product_id":"marine-rectifier-for-chrysler-outboards-sierra-18-99450-universal-replacement-rectifier","title":"Sierra Universal Rectifier 18-99450 for Chrysler Outboard Motors","description":"\u003cp\u003eThe Sierra 18-99450 is a universal rectifier built for Chrysler outboard motor electrical systems. A rectifier converts the AC output from the outboard's stator into DC current, which is what charges the battery and powers the boat's onboard electrical accessories. As a universal-fit unit for the Chrysler outboard electrical system, it is designed as a replacement component for boaters whose original rectifier has failed or is showing signs of weak charging performance.\u003c\/p\u003e\u003cp\u003eKeeping the charging circuit in good working order is essential on any outboard-powered boat, since a failed rectifier can leave the battery undercharged or allow damaging voltage spikes to reach sensitive electronics. The Sierra 18-99450 is a compact, lightweight part at just 0.3 pounds, making it straightforward to install in the existing mounting location on compatible Chrysler outboard motors.\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 18-99450\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Chrysler outboard motor electrical systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396152\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99450 rectifier do?\u003c\/strong\u003e It converts the AC current produced by a Chrysler outboard motor's stator into DC current, which charges the battery and powers the boat's electrical accessories.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard motors is the 18-99450 designed for?\u003c\/strong\u003e The 18-99450 is a universal rectifier built for the Chrysler outboard motor electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99450 weigh?\u003c\/strong\u003e It weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99450 a direct OEM replacement or a universal-fit part?\u003c\/strong\u003e It is sold as a universal rectifier for the Chrysler outboard electrical system rather than a single-application OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are signs that a boat's rectifier needs to be replaced?\u003c\/strong\u003e Weak or inconsistent battery charging and electrical system issues on a Chrysler outboard motor can point to a failing rectifier such as the Sierra 18-99450.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99450 rectifier?\u003c\/strong\u003e The UPC for the Sierra 18-99450 is 808282396152.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the rectifier come with mounting hardware?\u003c\/strong\u003e Specific included hardware is not listed for the Sierra 18-99450; buyers should confirm hardware compatibility with their existing installation before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-99450 be used on other outboard brands besides Chrysler?\u003c\/strong\u003e The Sierra 18-99450 is categorized specifically for the Chrysler outboard motor electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99450 a lightweight, compact component?\u003c\/strong\u003e Yes, at 0.3 pounds it is a small, lightweight part that fits into the standard rectifier mounting location on compatible Chrysler outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is a functioning rectifier important on an outboard-powered boat?\u003c\/strong\u003e Without a working rectifier like the 18-99450, the charging system cannot properly convert stator output to DC, which can lead to an undercharged battery or damage to onboard electronics.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444360923,"sku":"SIE-18-99450","price":109.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-155-1450_lg__70317.1558112348.500.750.jpg?v=1785329189"},{"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"},{"product_id":"mercury-mariner-outboard-voltage-regulator-40-amp-replaces-oem-18736-sierra-18-99442","title":"Sierra Mercury Mariner 40 Amp Voltage Regulator 18-99442, Replaces 18736","description":"\u003cp\u003eThe Sierra 18-99442 is a 40 amp voltage regulator built for Mercury and Mariner outboard engines. It manages charging output from the outboard's alternator\/stator system, regulating voltage delivered to the battery so onboard electronics and the starting battery receive a steady, controlled charge. A failed or failing regulator is a common cause of overcharging, undercharging, or a battery that will not hold a charge on Mercury and Mariner outboard applications, and replacing it with a properly rated 40 amp unit like the 18-99442 restores correct charging system operation.\u003c\/p\u003e\u003cp\u003eThis regulator is a direct cross-reference for OEM number 18736, making it a straightforward swap for boat owners and marine technicians servicing the charging system on Mercury\/Mariner outboards. It is sold as a standalone replacement part, so no separate wiring harness or bracket is included unless otherwise noted.\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 18-99442\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmp Rating:\u003c\/strong\u003e 40 Amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury\/Mariner Outboard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396268\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eMercury\/Mariner outboard engines.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e18736\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99442 voltage regulator do?\u003c\/strong\u003e The Sierra 18-99442 regulates the charging voltage produced by a Mercury\/Mariner outboard's alternator, controlling how much current flows to the battery so it charges correctly without overcharging or undercharging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99442 a 40 amp or a lower-amperage regulator?\u003c\/strong\u003e It is a 40 amp voltage regulator, matching the charging output of the Mercury\/Mariner outboard systems it is designed to service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-99442 replace OEM part 18736?\u003c\/strong\u003e Yes, Sierra part 18-99442 is a direct cross-reference for OEM number 18736.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-99442 regulator fit?\u003c\/strong\u003e This regulator is built for Mercury and Mariner outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99442 regulator weigh?\u003c\/strong\u003e The Sierra 18-99442 weighs 1.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this regulator new or remanufactured?\u003c\/strong\u003e The Sierra 18-99442 is a new replacement voltage regulator, not a remanufactured or repaired unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99442 regulator?\u003c\/strong\u003e The UPC for the Sierra 18-99442 Mercury\/Mariner voltage regulator is 808282396268.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the voltage regulator on my Mercury outboard?\u003c\/strong\u003e A worn or failed voltage regulator like the one replaced by the 18-99442 commonly causes overcharging, undercharging, or a battery that will not hold a charge, so replacing it restores correct charging system function.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99442 include mounting hardware or a wiring harness?\u003c\/strong\u003e The Sierra 18-99442 is sold as the regulator unit itself; no separate wiring harness or bracket is specified with this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use part number 18736 to search for this regulator?\u003c\/strong\u003e Yes, 18736 is the OEM number that the Sierra 18-99442 directly replaces, so it can be used to cross-reference the correct part.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444754139,"sku":"SIE-18-99442","price":597.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-194-1873_lg__36257.1594924668.500.750.jpg?v=1785188012"},{"product_id":"sierra-18-99481-voltage-regulator-for-mercury-and-mariner-outboards","title":"Sierra Voltage Regulator 18-99481 for Mercury Mariner Outboard Engines","description":"\u003cp\u003eThe Sierra 18-99481 is a voltage regulator built as a replacement for Mercury Mariner outboard engines. A voltage regulator manages the charging output from the engine's alternator or stator, keeping the electrical system supplied with a steady, controlled voltage for the battery and onboard electronics. Sierra manufactures this component to match the fit, connection points, and electrical performance of the original equipment it replaces on covered Mercury Mariner outboard applications.\u003c\/p\u003e\u003cp\u003eThis part is sold individually as a direct-fit replacement unit. It is intended for boat owners and marine technicians servicing Mercury Mariner outboard charging systems who need a reliable regulator without sourcing a full OEM assembly. The unit weighs 1.9 pounds as shipped.\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 18-99481\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Voltage Regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Brand:\u003c\/strong\u003e Mercury Mariner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Outboard Engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396039\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Mercury Mariner outboard engines.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are specified for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99481?\u003c\/strong\u003e The Sierra 18-99481 is a voltage regulator designed as a replacement part for Mercury Mariner outboard engines, controlling the charging voltage sent to the battery and electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-99481 voltage regulator fit?\u003c\/strong\u003e This regulator is built for Mercury Mariner outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99481 weigh?\u003c\/strong\u003e The Sierra 18-99481 voltage regulator weighs 1.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99481 a genuine Mercury Mariner part or aftermarket?\u003c\/strong\u003e The 18-99481 is manufactured by Sierra as a replacement part for Mercury Mariner outboard engines, not an original Mercury Marine branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a voltage regulator do on an outboard engine?\u003c\/strong\u003e A voltage regulator, such as the Sierra 18-99481, controls the output from the engine's charging system so the battery and electronics receive a steady, regulated voltage instead of raw alternator or stator output.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-99481?\u003c\/strong\u003e Ordering the Sierra 18-99481 gets you the voltage regulator unit itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the Sierra 18-99481 myself?\u003c\/strong\u003e The Sierra 18-99481 is sold as a direct-fit replacement regulator for Mercury Mariner outboards, and installation follows the same mounting and wiring connections as the original regulator it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99481 come with a warranty?\u003c\/strong\u003e Warranty terms for the Sierra 18-99481 voltage regulator are set by Sierra and the selling retailer at time of purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand manufactures part number 18-99481?\u003c\/strong\u003e Part number 18-99481 is manufactured by Sierra.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace my outboard's voltage regulator?\u003c\/strong\u003e A failing voltage regulator can cause overcharging or undercharging of the battery on a Mercury Mariner outboard, and the Sierra 18-99481 is offered as a replacement for that component.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444885211,"sku":"SIE-18-99481","price":525.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-194-8736K1_lg__78557.1558114069.500.750.jpg?v=1785329190"},{"product_id":"marine-rectifier-for-nissan-tohatsu-suzuki-outboards-replaces-oem-158-9501-sierra-18-99475-ignition-charging","title":"Sierra Rectifier 18-99475, Compatible with Tohatsu 158-9501, Nissan Outboard Ignition System","description":"\u003cp\u003eThe Sierra 18-99475 rectifier is an ignition system component built to convert alternator AC output into DC current for battery charging on compatible outboard engines. It operates automatically, requiring no manual switching, and is designed as a direct fit for Tohatsu 158-9501 and Nissan outboard applications. As a rectifier, it plays a critical role in keeping the starting and house battery properly charged while the engine runs, protecting sensitive onboard electronics from voltage spikes and ensuring reliable engine starts.\u003c\/p\u003e\u003cp\u003eThis component is intended for boat owners and marine technicians replacing a failed or underperforming original rectifier. A weak or failing rectifier is a common cause of poor battery charging, dim electrical accessories, or a battery that will not hold a charge even after running the engine. Installing the Sierra 18-99475 restores proper charging voltage regulation to the outboard's electrical system.\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 18-99475\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Rectifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation Mode:\u003c\/strong\u003e Automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Use:\u003c\/strong\u003e Battery charging (battery powered systems)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Tohatsu 158-9501\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTohatsu outboard engines\u003c\/li\u003e\n\u003cli\u003eNissan outboard engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99475 rectifier do?\u003c\/strong\u003e It converts the AC output from the outboard's alternator into DC current so the battery charges correctly while the engine is running, operating automatically without any manual switching.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99475 compatible with Tohatsu outboards?\u003c\/strong\u003e Yes, the Sierra 18-99475 is compatible with Tohatsu 158-9501 applications, making it a direct option for Tohatsu outboard engines that use that rectifier.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this rectifier fit Nissan outboards?\u003c\/strong\u003e The 18-99475 rectifier is built for Nissan outboard engines as well as Tohatsu applications sharing the 158-9501 reference.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99475 rectifier weigh?\u003c\/strong\u003e It weighs 0.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know my outboard's rectifier needs to be replaced?\u003c\/strong\u003e Common symptoms of a failing rectifier on Tohatsu and Nissan outboards include a battery that will not hold a charge, dim or flickering electrical accessories, or no charging output at the battery despite the engine running; swapping in the Sierra 18-99475 restores proper charging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99475 an automatic or manual rectifier?\u003c\/strong\u003e It is an automatic rectifier, so it regulates and converts charging current without any operator input once installed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the 18-99475 rectifier myself?\u003c\/strong\u003e The Sierra 18-99475 rectifier mounts and wires in place of the original outboard rectifier, and installation typically involves disconnecting the old unit's wiring harness and connecting the replacement in the same configuration; a technician should verify wiring against the engine's own service documentation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the Sierra 18-99475 and the original Tohatsu 158-9501 rectifier?\u003c\/strong\u003e The Sierra 18-99475 is built to be compatible with the Tohatsu 158-9501 rectifier, giving boat owners a replacement option for that same application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the recommended use for the Sierra 18-99475 rectifier?\u003c\/strong\u003e It is recommended for battery powered charging systems on compatible Tohatsu and Nissan outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99475 rectifier come with mounting hardware?\u003c\/strong\u003e The listing for the Sierra 18-99475 covers the rectifier unit itself; buyers should confirm hardware needs against their specific outboard installation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988445409499,"sku":"SIE-18-99475","price":101.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-158-9501_lg__09368.1558112496.500.750.jpg?v=1785188639"},{"product_id":"mercruiser-voltage-regulator-for-470-485-488-3-7l-inline-engines-replaces-99502a13-86255a3-sierra-18-99421-1976-1989","title":"Sierra 18-99421 Voltage Regulator for Mercury\/Mariner Outboard Engines, Replaces 77305A2, 703579","description":"\u003cp\u003eThe Sierra 18-99421 Voltage Regulator is a direct-fit electrical component engineered to regulate charging output on compatible Mercury\/Mariner outboard engines. Voltage regulators control the amount of current sent from the alternator\/stator to the battery, protecting the electrical system from overcharging while keeping the battery properly topped off during operation. This regulator operates at 12 volts, matching the standard charging system voltage used across the supported engine range.\u003c\/p\u003e\u003cp\u003eThis part is built for engines including the 1976-1984 470 with BBL carburetor, 1980-1984 485 and 488 with BBL carburetor, 1985-1986 170 and 190, 1987 165 and 180, and 1988-1989 3.7L Mercury\/Mariner outboards. Because voltage regulators are wear items subject to heat cycling and vibration, replacing a failing unit with a properly rated component like the 18-99421 helps prevent downstream damage to the battery and other electrical accessories caused by improper charging voltage.\u003c\/p\u003e\u003cp\u003eThe Sierra 18-99421 cross-references to multiple OEM and aftermarket part numbers, making it a straightforward replacement for boat owners and marine technicians servicing older Mercury\/Mariner outboard charging systems.\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 18-99421\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12 Volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury\/Mariner outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 703579, 77305A2, 86255A2, 86255A3, 99502A4, 99502A7, 99502A8, 99502A9, 99502A12, 99502A13\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 470 with BBL Carb, 1976-1984\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 485 and 488 with BBL Carb, 1980-1984\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 170 and 190, 1985-1986\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 165 and 180, 1987\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 3.7L, 1988-1989\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e703579\u003c\/li\u003e\n\u003cli\u003e77305A2\u003c\/li\u003e\n\u003cli\u003e86255A2\u003c\/li\u003e\n\u003cli\u003e86255A3\u003c\/li\u003e\n\u003cli\u003e99502A4\u003c\/li\u003e\n\u003cli\u003e99502A7\u003c\/li\u003e\n\u003cli\u003e99502A8\u003c\/li\u003e\n\u003cli\u003e99502A9\u003c\/li\u003e\n\u003cli\u003e99502A12\u003c\/li\u003e\n\u003cli\u003e99502A13\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99421 voltage regulator do?\u003c\/strong\u003e It regulates the charging current sent from the outboard's alternator or stator to the battery, keeping the 12 volt charging system operating at the correct output and preventing overcharging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich Mercury\/Mariner engines does the 18-99421 fit?\u003c\/strong\u003e The Sierra 18-99421 fits the 1976-1984 470 with BBL carburetor, the 1980-1984 485 and 488 with BBL carburetor, the 1985-1986 170 and 190, the 1987 165 and 180, and the 1988-1989 3.7L Mercury\/Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99421 a 12 volt regulator?\u003c\/strong\u003e Yes, the Sierra 18-99421 voltage regulator is rated for 12 volt marine charging systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-99421 replace?\u003c\/strong\u003e It replaces OEM and cross-reference numbers 703579, 77305A2, 86255A2, 86255A3, 99502A4, 99502A7, 99502A8, 99502A9, 99502A12, and 99502A13.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99421 weigh?\u003c\/strong\u003e The Sierra 18-99421 voltage regulator weighs 2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this regulator work if my old one shows OEM number 77305A2?\u003c\/strong\u003e Yes, part number 77305A2 is listed as a direct cross-reference to the Sierra 18-99421, so it is a suitable replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan a failing voltage regulator damage my battery?\u003c\/strong\u003e Yes, a failing regulator can allow overcharging or undercharging, which can shorten battery life or damage other electrical components on the engine; replacing it with the 18-99421 restores proper charging control.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99421 fit engines with a BBL carburetor?\u003c\/strong\u003e Yes, it fits the 470, 485, and 488 Mercury\/Mariner engine models equipped with a BBL carburetor within the listed year ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99421 an aftermarket or genuine part?\u003c\/strong\u003e The 18-99421 is a Sierra-branded replacement part designed to match the specifications of the original equipment voltage regulators it cross-references, including OEM number 703579.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate I need to replace my outboard's voltage regulator?\u003c\/strong\u003e Common signs include a battery that will not hold a charge, overcharging or undercharging readings, or dimming\/flickering electrical accessories; installing the Sierra 18-99421 addresses these issues when the regulator is the cause.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99421 fit the 3.7L Mercury\/Mariner engine?\u003c\/strong\u003e Yes, it fits the 1988-1989 3.7L Mercury\/Mariner outboard engine.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988460351707,"sku":"SIE-18-99421","price":547.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-194-9502_lg__04256.1748445884.500.750.jpg?v=1785188235"},{"product_id":"cdi-electronics-xt-sf-170-ir-xt-series-alternator-170a-12v-single-foot-mount-for-volvo-penta-mercruiser-pleasurecraft-crusader-indmar","title":"CDI Electronics XT-SF-170-IR XT Series Alternator, 170A 12V, Single Foot Mount for Volvo Penta, Mercruiser, Pleasurecraft, Crusader, Indmar","description":"\u003cp\u003eThe CDI Electronics XT-SF-170-IR is an XT Series Alternator built for marine engines that demand strong charging output in a compact case. It is designed for use with Volvo Penta (Gas \u0026amp; Diesel), Mercruiser, Pleasurecraft, Crusader, and Indmar engines. Rated at 170 amps with up to 110 amps of output at idle speeds, it is well suited to vessels running higher electrical loads such as electronics, refrigeration, and accessory systems that need steady charging even when the engine is not at cruising RPM.\u003c\/p\u003e\u003cp\u003eThis alternator uses a single foot (SF) mount, 1-2 inch, paired with a K6 serpentine pulley, and runs on an internal voltage regulator (IR) for simplified wiring compared to externally regulated units. Dual fan cooling and a high-airflow frame help the unit shed heat during sustained duty cycles, while custom high-speed bearings are built in for long service life. The XT-SF-170-IR is made in the USA.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CDI Electronics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e XT-SF-170-IR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 170 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12 volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdle Output:\u003c\/strong\u003e Up to 110 amps at idle speeds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegulator Type:\u003c\/strong\u003e Internal regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Single foot (SF), 1-2 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Type:\u003c\/strong\u003e K6 serpentine pulley\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Dual fan cooling, high airflow frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e Custom high speed bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in the USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions (L x W x H):\u003c\/strong\u003e 10.24 x 9.45 x 9.06 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions (L x W x H):\u003c\/strong\u003e 10 x 7.99 x 7.99 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 20 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 676205501996\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e Volvo Penta (Gas \u0026amp; Diesel), Mercruiser, Pleasurecraft, Crusader, Indmar\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVolvo Penta (Gas \u0026amp; Diesel)\u003c\/li\u003e\n\u003cli\u003eMercruiser\u003c\/li\u003e\n\u003cli\u003ePleasurecraft\u003c\/li\u003e\n\u003cli\u003eCrusader\u003c\/li\u003e\n\u003cli\u003eIndmar\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the CDI XT-SF-170-IR alternator designed for?\u003c\/strong\u003e The CDI Electronics XT-SF-170-IR is designed for use with Volvo Penta (Gas \u0026amp; Diesel), Mercruiser, Pleasurecraft, Crusader, and Indmar engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many amps does the XT-SF-170-IR alternator produce?\u003c\/strong\u003e 170 amps is the rated output of the XT-SF-170-IR, with up to 110 amps available at idle speeds, making it suited to vessels with higher electrical loads.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the XT-SF-170-IR a 12 volt alternator?\u003c\/strong\u003e Yes, the CDI Electronics XT-SF-170-IR is a 12 volt alternator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of mount does the XT-SF-170-IR use?\u003c\/strong\u003e A single foot (SF) mount, 1-2 inch, is used on the XT-SF-170-IR alternator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the XT-SF-170-IR have an internal or external voltage regulator?\u003c\/strong\u003e Internal regulator (IR) is built into the XT-SF-170-IR, which simplifies wiring compared to an externally regulated unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pulley comes installed on the CDI XT-SF-170-IR?\u003c\/strong\u003e A K6 serpentine pulley is fitted to the XT-SF-170-IR alternator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the XT-SF-170-IR and the XT-VT-170-IR?\u003c\/strong\u003e The XT-SF-170-IR uses a single foot (SF) mount with a K6 serpentine pulley for Volvo Penta, Mercruiser, Pleasurecraft, Crusader, and Indmar engines, while the XT-VT-170-IR is built with a Vortec mount, K6 serpentine pulley, and case ground for GM Block (Chevy) 5.0L, 5.7L, and 6.2L engines. Confirm the mount type before ordering, since the two are not interchangeable.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the XT-SF-170-IR alternator?\u003c\/strong\u003e The XT-SF-170-IR measures 10.24 x 9.45 x 9.06 inches (L x W x H).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the XT-SF-170-IR alternator weigh?\u003c\/strong\u003e 20 pounds is the weight of the CDI Electronics XT-SF-170-IR alternator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the XT-SF-170-IR alternator manufactured?\u003c\/strong\u003e The XT-SF-170-IR alternator is made in the USA.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat cooling system does the XT-SF-170-IR use?\u003c\/strong\u003e Dual fan cooling with a high-airflow frame is used on the XT-SF-170-IR to manage heat during sustained duty cycles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the CDI XT-SF-170-IR a genuine CDI Electronics part?\u003c\/strong\u003e Yes, the XT-SF-170-IR is a CDI Electronics XT Series Alternator, purpose-built for Volvo Penta, Mercruiser, Pleasurecraft, Crusader, and Indmar engines.\u003c\/p\u003e","brand":"CDI Electronics","offers":[{"title":"Default Title","offer_id":49027442344155,"sku":"CDI-XT-SF-170-IR","price":610.73,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-XT-SF-170__24407.1739466567.500.750.jpg?v=1785163470"},{"product_id":"cdi-electronics-xt-vt-170-ir-xt-series-170a-alternator-vortec-mount-for-gm-5-0l-5-7l-6-2l","title":"CDI Electronics XT-VT-170-IR XT Series 170A Alternator - Vortec Mount for GM 5.0L\/5.7L\/6.2L","description":"\u003cp\u003eThe CDI Electronics XT-VT-170-IR is an XT Series marine alternator built with a Vortec mount, K6 serpentine pulley, and case ground GM style mounting, making it a direct fit for GM Block (Chevy) 5.0L, 5.7L, and 6.2L marine engines. Rated at 170A output at 12V, this alternator is engineered for vessels with high electrical load demands, delivering up to 110A even at idle speed so house and starting batteries stay charged during low-RPM operation such as trolling or extended anchoring.\u003c\/p\u003e\u003cp\u003eThe alternator uses custom high speed bearings for extended service life under continuous marine duty, and a dual fan cooling design with a high airflow frame to manage heat during sustained high-output charging. Its compact case package keeps the footprint small for tight engine bay installations while still delivering full-size charging output. The XT-VT-170-IR is built to CDI Electronics' standard of marine-grade reliability as a cost-effective alternative to OEM-supplied charging components.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CDI Electronics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e XT-VT-170-IR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 170 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12 volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdle Output:\u003c\/strong\u003e Up to 110 amps at idle speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Vortec mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Type:\u003c\/strong\u003e K6 serpentine pulley\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Case ground, GM style mounting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e GM Block (Chevy) 5.0L, 5.7L, 6.2L engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Dual fan cooling, high airflow frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e Custom high speed bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 10 x 10 x 9 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 20 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 676205500951\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM Block (Chevy) 5.0L, 5.7L, and 6.2L engines with Vortec mounting\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the CDI XT-VT-170-IR alternator fit?\u003c\/strong\u003e The XT-VT-170-IR is designed with a Vortec mount, K6 serpentine pulley, and case ground GM style mounting typical for GM Block (Chevy) 5.0L, 5.7L, and 6.2L engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many amps does this alternator produce?\u003c\/strong\u003e The CDI Electronics XT-VT-170-IR is rated at 170 amps at 12 volts, with up to 110 amps available even at idle speed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this alternator keep up with a high electrical load boat?\u003c\/strong\u003e Yes, delivering up to 110A at idle makes the XT-VT-170-IR well suited to vessels with high electrical load demands, such as those running extensive electronics or accessories while at low RPM.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat kind of pulley does the XT-VT-170-IR use?\u003c\/strong\u003e It uses a K6 serpentine pulley as part of its Vortec mount configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the CDI XT-VT-170-IR alternator grounded and mounted?\u003c\/strong\u003e It uses a case ground, GM style mounting arrangement paired with a Vortec mount, matching the factory mounting style on compatible GM Block engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions and weight of this alternator?\u003c\/strong\u003e The XT-VT-170-IR measures 10 x 10 x 9 inches and weighs 20 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the alternator housing made from?\u003c\/strong\u003e The XT-VT-170-IR alternator has a plastic housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does CDI Electronics manage heat buildup on this alternator?\u003c\/strong\u003e The XT-VT-170-IR uses dual fan cooling with a high airflow frame to dissipate heat during sustained high-output charging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat bearings are used in the XT-VT-170-IR alternator?\u003c\/strong\u003e It is built with custom high speed bearings intended for long service life under marine duty cycles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the XT-VT-170-IR a compact alternator?\u003c\/strong\u003e Yes, the XT-VT-170-IR is built in a small case package while still delivering its full 170A rated output.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the CDI XT-VT-170-IR alternator?\u003c\/strong\u003e The CDI Electronics XT-VT-170-IR alternator carries UPC 676205500951.\u003c\/p\u003e","brand":"CDI Electronics","offers":[{"title":"Default Title","offer_id":49027442376923,"sku":"CDI-XT-VT-170","price":610.73,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/XT-VT-170-IR__08645.1739466567.500.750.jpg?v=1785163470"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/collections\/XT-VT-170-IR__08645.1739466567.500.750.jpg?v=1785356979","url":"https:\/\/www.goodvibesmarina.com\/collections\/gvcat-engine-parts-systems-ignition-starting-ignition-coils-packs-modules-voltage-regulators-rectifiers.oembed?page=2","provider":"Good Vibes Marina","version":"1.0","type":"link"}