{"product_id":"pdok-alternator-21453-12v-55a-for-mercury-outboard-150-135-hp-cw-rotation-64mm-s4-pulley","title":"PDOK Alternator 21453 12V 55A for Mercury Outboard 150\/135 HP — CW Rotation, 64mm S4 Pulley","description":"\u003cp\u003e\u003cstrong\u003ePDOK Alternator 21453 is a direct-fit 12V, 55A replacement alternator built to restore charging performance on compatible Mercury outboard engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned as a drop-in replacement for several Mercury OEM part numbers, this PDOK alternator offers the same mounting geometry, electrical terminals, and pulley class as the factory unit. It is engineered for clockwise rotation with a 64mm OD S4-groove pulley and includes integral regulator and fan options (IR\/IF). Built to match original form and function, the assembly targets 135–150 horsepower Mercury models listed by serial ranges and model years.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Mercury outboards will this alternator fit?\u003c\/h3\u003e\n\u003cp\u003eThis alternator is compatible with a range of Mercury Marine 135–150 HP outboards across specific serial numbers and model variants. Check your engine’s serial number and model year against the listed compatibility before purchase to ensure a correct match.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Mercury 135.0 HP — SN 2B131942 \u0026amp; up\u003c\/li\u003e\n  \u003cli\u003eFits Mercury 150.0 HP and 150.0 HP ProXS\/SeaPro — multiple SN ranges noted\u003c\/li\u003e\n  \u003cli\u003eIncludes fitment for 150CXL SeaPro (2016–2020), 150L and 150XL 4-Stroke and Pro XS variants (2012–2020 depending on model)\u003c\/li\u003e\n  \u003cli\u003eCross-references OEM numbers: 8M0057693, 8M0062515, 8M0065239, AND0626, 400-52434\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do the electrical and mechanical specifications compare to the original?\u003c\/h3\u003e\n\u003cp\u003eThe PDOK alternator is specified to meet or exceed original equipment values: 12 volts and 55 amps with clockwise rotation. Mounting ear hole sizes and threaded connections match factory locations so the alternator installs without modification in most cases.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOutput: 12 V, 55 Amp\u003c\/li\u003e\n  \u003cli\u003eRotation: Clockwise (CW), Pulley Class: S4, Pulley OD: 64 mm\u003c\/li\u003e\n  \u003cli\u003eMounting ears: numbered holes with exact diameters and threads for bolt compatibility\u003c\/li\u003e\n  \u003cli\u003eTerminals: B+ M6x1.00, S and L spade terminals for stock wiring harnesses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat quality assurances and warranty come with this alternator?\u003c\/h3\u003e\n\u003cp\u003ePDOK units are assembled from premium components and undergo quality inspection before shipment. The alternator is backed by a return and limited warranty policy to help cover fitment or performance concerns that may appear after installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eQuality tested for function and fit to reduce installation issues\u003c\/li\u003e\n  \u003cli\u003e30-day free return window for buyer satisfaction\u003c\/li\u003e\n  \u003cli\u003e365-day limited warranty for defects or failures under normal use\u003c\/li\u003e\n  \u003cli\u003eCustomer support available for troubleshooting, replacement, or refund\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I confirm fitment and install the replacement alternator?\u003c\/h3\u003e\n\u003cp\u003eVerify your engine’s OEM part number and serial number against the listed cross-references before ordering. Installation follows standard alternator replacement steps: disconnect battery, remove belt and mounting hardware, swap the unit, connect terminals, and tension the belt to factory spec.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm OEM part numbers: 8M0057693, 8M0062515, 8M0065239\u003c\/li\u003e\n  \u003cli\u003eCheck serial number and model year compatibility listed in product details\u003c\/li\u003e\n  \u003cli\u003eFollow factory torque specs and belt tension procedures during installation\u003c\/li\u003e\n  \u003cli\u003eRecheck charging system output after installation with a multimeter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this alternator is for: boat owners, marine technicians, and fleet managers who need a reliable, direct-fit alternator for specific Mercury 135–150 HP outboards. If you want a component built to original mounting and electrical standards with manufacturer support and warranty coverage, this PDOK alternator is intended to replace worn or failed factory units and get your charging system back to proper function.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this alternator match Mercury OEM part numbers?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It cross-references OEM numbers 8M0057693, 8M0062515, 8M0065239, AND0626, and 400-52434.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the warranty period for the PDOK alternator?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: PDOK offers 30 days free return and a 365-day limited warranty for defects or failures.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"PDOK","offers":[{"title":"Default Title","offer_id":67585585873081,"sku":"B0CMWLR96H","price":367.58,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/pdok-alternator-front-view.jpg?v=1790472914","url":"https:\/\/redleafauto.ca\/products\/pdok-alternator-21453-12v-55a-for-mercury-outboard-150-135-hp-cw-rotation-64mm-s4-pulley","provider":"Redleaf Auto","version":"1.0","type":"link"}