{"product_id":"merc-342","title":"Mercury MerCruiser Engine Mount Jam Nut 3\/4-16 49252","description":"\u003cp\u003eMercury MerCruiser 49252 is a genuine OEM nut used in \u003cstrong\u003eengine mounting\u003c\/strong\u003e assemblies on a wide range of MerCruiser gasoline and diesel applications. Current Mercury dealer references show \u003cstrong\u003e49252\u003c\/strong\u003e superseded to \u003cstrong\u003e859126\u003c\/strong\u003e, and current OEM-style engine-mounting diagrams identify the replacement as a \u003cstrong\u003e3\/4-16 jam nut\u003c\/strong\u003e used with the mount base, tab washer, and lockwasher hardware stack.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury Marine OEM part number \u003cstrong\u003e49252\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCurrent replacement part number is \u003cstrong\u003e859126\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCurrent engine-mounting diagrams identify the replacement as a \u003cstrong\u003e3\/4-16 jam nut\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUsed in the \u003cstrong\u003eengine mounting\u003c\/strong\u003e hardware stack with the mount base, tab washer, and lockwasher.\u003c\/li\u003e\n\u003cli\u003eCurrent dealer shipping specs for 49252 are approximately \u003cstrong\u003e0.06 lb\u003c\/strong\u003e, \u003cstrong\u003e1.25 in. x 1.25 in. x 1.00 in.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eCurrent Mercury dealer references connect 49252 to a broad range of MerCruiser applications, including \u003cstrong\u003e200\/230\/260\/350 MAG\/5.0L\/5.7L\/454 MAG\/502 MAG\/7.4L\/7.4LX\u003c\/strong\u003e gasoline packages, plus diesel coverage such as \u003cstrong\u003e7.3L Bravo \u0026amp; MIE diesel\u003c\/strong\u003e and \u003cstrong\u003eD7.3L D-Tronic\u003c\/strong\u003e. Current OEM-style diagrams also place the superseding \u003cstrong\u003e859126\u003c\/strong\u003e in \u003cstrong\u003eengine mounting\u003c\/strong\u003e layouts for applications such as \u003cstrong\u003e5.7L EFI\/TBI\u003c\/strong\u003e, \u003cstrong\u003e7.4LX Bravo\u003c\/strong\u003e, \u003cstrong\u003e454 EFI \/ 502 EFI Gen V\u003c\/strong\u003e, and \u003cstrong\u003e496 MAG\u003c\/strong\u003e families.\u003c\/p\u003e\n\u003ch2\u003eSerial Number Fitment Notice\u003c\/h2\u003e\n\u003cp\u003eVerify fitment by exact \u003cstrong\u003eengine serial number\u003c\/strong\u003e and the correct \u003cstrong\u003eengine mounting\u003c\/strong\u003e parts diagram before ordering. This nut appears across multiple MerCruiser engine families, so serial-based confirmation is the safest way to match the correct mounting hardware and replacement number.\u003c\/p\u003e\n\u003ch2\u003eWhen This Part Needs Replacement\u003c\/h2\u003e\n\u003cp\u003eReplace this nut when the original is damaged, rounded, corroded, distorted, or removed during engine-mount service and no longer suitable for reuse. Because current diagrams place it in the engine-mount hardware stack, correct fit and thread condition matter for secure mount adjustment and retention. This is a practical service inference based on its documented engine-mounting role.\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eInstall this part only after confirming the correct MerCruiser engine-mounting diagram for the engine being serviced. Current diagrams show the superseding \u003cstrong\u003e859126\u003c\/strong\u003e used with the \u003cstrong\u003ebase assembly 814263A1\u003c\/strong\u003e, \u003cstrong\u003etab washer 12657\u003c\/strong\u003e, and \u003cstrong\u003elockwasher 68102\u003c\/strong\u003e, so it should be matched to the exact mount arrangement during reassembly.\u003c\/p\u003e\n\u003ch2\u003eAlternate\/Superseded Part Numbers\u003c\/h2\u003e\n\u003cp\u003eCurrent Mercury references show \u003cstrong\u003e859126\u003c\/strong\u003e as the superseding replacement for \u003cstrong\u003e49252\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eParts Desk Insight\u003c\/h2\u003e\n\u003cp\u003eWith engine-mount hardware like this, the important match is the \u003cstrong\u003emounting diagram and thread size\u003c\/strong\u003e, not just the word “nut.” Checking the serial-number-based engine-mount breakdown first is the easiest way to avoid getting the wrong hardware for the mount stack.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563861606436,"sku":"49252","price":19.15,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/fbed1146-6728-4f0a-96bb-18d307c92a0b.png?v=1776986855","url":"https:\/\/marisolmarine.com\/products\/merc-342","provider":"Marisol Marine Company","version":"1.0","type":"link"}