{"product_id":"853811t10-regulator-rectifier-for-mercury-tohatsu-f25-f30-mfs25-mfs25b-mfs30-mfs30b-jlm-marine","title":"853811T10 Regulator Rectifier for Mercury Tohatsu F25 F30 MFS25 MFS25B MFS30 MFS30B | JLM Marine","description":"\u003ch2\u003eRegulator Rectifier for Mercury Tohatsu F25 F30 MFS25 MFS25B MFS30 MFS30B\u003c\/h2\u003e\n\n\u003cp\u003eThis aftermarket regulator rectifier is designed to fit Mercury and Tohatsu 4-stroke outboard engines rated at 25–30 HP. It ensures stable voltage regulation for reliable electrical system performance on MFS25, MFS25B, MFS30, and MFS30B models from 2005 to 2014, as well as Mercury F25 and F30 engines.\u003c\/p\u003e\n\n\u003cp\u003eThis unit directly replaces OEM part numbers \u003cstrong\u003e853811T10\u003c\/strong\u003e and \u003cstrong\u003e898103T14\u003c\/strong\u003e for Mercury, and \u003cstrong\u003e3AC-76065-0\u003c\/strong\u003e, \u003cstrong\u003e3AC-76065-1\u003c\/strong\u003e, and \u003cstrong\u003e3AC-76065-2\u003c\/strong\u003e for Tohatsu. It provides a cost-effective solution for maintaining your outboard's charging system.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e100% brand-new aftermarket replacement\u003c\/li\u003e\n  \u003cli\u003eFits 4-stroke Mercury and Tohatsu outboards\u003c\/li\u003e\n  \u003cli\u003eReplaces multiple OEM part numbers for broad compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e853811T10\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e898103T14\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTohatsu\u003c\/td\u003e\n      \u003ctd\u003e3AC-76065-0\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTohatsu\u003c\/td\u003e\n      \u003ctd\u003e3AC-76065-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTohatsu\u003c\/td\u003e\n      \u003ctd\u003e3AC-76065-2\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS25\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005-2014\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS25B\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005-2014\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS30\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005-2014\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS30B\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005-2014\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eF25\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eF30\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCondition\u003c\/td\u003e\n      \u003ctd\u003eAftermarket 100% Brand New\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eQuantity\u003c\/td\u003e\n      \u003ctd\u003e1 PC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFitment Type\u003c\/td\u003e\n      \u003ctd\u003e4-Stroke Outboard Engines\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003e1 × Voltage Regulator Rectifier\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cspan style=\"color:red;\"\u003eThe package contains all the parts shown in the picture.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery's negative terminal to prevent electrical shock or short circuits.\u003c\/li\u003e\n  \u003cli\u003eLocate the existing regulator rectifier on your outboard engine, typically mounted near the powerhead or electrical components.\u003c\/li\u003e\n  \u003cli\u003eDisconnect all electrical connectors from the old regulator rectifier, noting their positions for reassembly.\u003c\/li\u003e\n  \u003cli\u003eRemove the mounting bolts securing the old unit to the engine. Keep hardware if reusable.\u003c\/li\u003e\n  \u003cli\u003eClean the mounting surface to ensure proper heat dissipation and electrical grounding.\u003c\/li\u003e\n  \u003cli\u003ePosition the new regulator rectifier in place and secure it with the mounting bolts. Torque to manufacturer specifications.\u003c\/li\u003e\n  \u003cli\u003eReconnect all electrical connectors to the new unit, matching colors and positions from the original configuration.\u003c\/li\u003e\n  \u003cli\u003eEnsure all connections are tight and secure to prevent voltage drops or electrical failures.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery's negative terminal.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and verify proper charging system operation using a multimeter (voltage should read 13.5–14.5V at idle).\u003c\/li\u003e\n  \u003cli\u003eCheck for any unusual heat buildup on the regulator rectifier after 10–15 minutes of operation.\u003c\/li\u003e\n  \u003cli\u003eIf voltage readings are abnormal or the unit overheats, shut down immediately and recheck all connections.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this regulator rectifier fits my engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your original part number with the OEM numbers listed (853811T10, 898103T14 for Mercury; 3AC-76065-0\/1\/2 for Tohatsu). Also verify your engine model and year against the compatibility table above.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the symptoms of a failing regulator rectifier?\u003c\/strong\u003e\u003cbr\u003e\nA: Common signs include battery not charging, dim or flickering lights, battery overcharging (boiling), or electrical components failing intermittently. Use a multimeter to check voltage output while the engine is running.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the regulator rectifier?\u003c\/strong\u003e\u003cbr\u003e\nA: Regulator rectifiers typically last several years under normal conditions. Replace immediately if you experience charging system failures, overheating, or electrical issues. Regular inspection during annual maintenance is recommended.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this myself or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: Installation is straightforward for those with basic mechanical and electrical skills. However, professional installation is recommended to ensure proper connections and prevent electrical system damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this work if my engine model is listed but the year is different?\u003c\/strong\u003e\u003cbr\u003e\nA: Only proceed if your original part number matches one of the OEM numbers listed. Even if your model appears compatible, year variations may have different electrical specifications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between OEM and aftermarket regulator rectifiers?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51981024428345,"sku":"24RR338","price":37.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/A3c64350c303047d4bcaba6ad18c82a6cv.webp?v=1772415065","url":"https:\/\/jlmmarine.com\/es\/products\/853811t10-regulator-rectifier-for-mercury-tohatsu-f25-f30-mfs25-mfs25b-mfs30-mfs30b-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}