{"product_id":"merc-797","title":"Mercury MerCruiser Bravo III Front Propeller Nut 859131","description":"\u003cp\u003eMercury 859131 is a genuine OEM \u003cstrong\u003efront propeller nut\u003c\/strong\u003e for \u003cstrong\u003eBravo III\u003c\/strong\u003e stern drives. Current Mercury dealer references show \u003cstrong\u003e859131\u003c\/strong\u003e superseded to \u003cstrong\u003e8M0105210\u003c\/strong\u003e, and current Bravo III parts references identify it specifically as the \u003cstrong\u003efront prop nut\u003c\/strong\u003e in the propeller hardware stack.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury Marine OEM part number \u003cstrong\u003e859131\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCurrent replacement part number is \u003cstrong\u003e8M0105210\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIdentified in current parts references as the \u003cstrong\u003efront prop nut\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUsed on \u003cstrong\u003eBravo III\u003c\/strong\u003e propeller hardware, where it installs after the front propeller.\u003c\/li\u003e\n\u003cli\u003eCurrent dealer listing shows broad application coverage across \u003cstrong\u003eBravo One\/Two\/Three families, Bravo X, Bravo XR, Zeus 3000, and integrated\/high-performance transom listings\u003c\/strong\u003e in Mercury's where-used records, but the clearest current product-level description is Bravo III front prop nut service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis is \u003cstrong\u003enot an engine-only part\u003c\/strong\u003e. The strongest supportable fitment for 859131 is \u003cstrong\u003eBravo III sterndrive propeller hardware\u003c\/strong\u003e service, where current sources identify it as the \u003cstrong\u003efront prop nut\u003c\/strong\u003e. Mercury's where-used records also show the superseded number across broader sterndrive and Zeus-family listings, so the safest fitment language is by \u003cstrong\u003edrive model and propeller stack\u003c\/strong\u003e, not engine model alone.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eVerify fitment by exact \u003cstrong\u003edrive model\u003c\/strong\u003e, \u003cstrong\u003eserial number\u003c\/strong\u003e, and the correct \u003cstrong\u003epropeller hardware diagram\u003c\/strong\u003e before ordering. With 859131, the important match is the \u003cstrong\u003efront nut position\u003c\/strong\u003e in the Bravo III propeller stack, since Bravo III uses separate front and rear prop hardware.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace this prop nut when the original is damaged, corroded, rounded, distorted, or removed during propeller service and no longer suitable for reuse. Because it is part of the Bravo III propeller-retention hardware, correct fit and condition matter for secure propeller installation. This is a practical service inference supported by its documented front prop nut role.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eInstall this part only after confirming the correct \u003cstrong\u003eBravo III propeller hardware order\u003c\/strong\u003e. Current Bravo III references show this as the \u003cstrong\u003efront prop nut\u003c\/strong\u003e, which goes on after the front propeller and before the remaining Bravo III hardware stack.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCurrent Mercury references show \u003cstrong\u003e8M0105210\u003c\/strong\u003e as the superseding replacement for \u003cstrong\u003e859131\u003c\/strong\u003e. Additional current cross-reference sources also associate older numbers \u003cstrong\u003e805092T\u003c\/strong\u003e and \u003cstrong\u003e805092\u003c\/strong\u003e with this same Bravo III prop nut family.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eWith Bravo III prop hardware, the important match is the \u003cstrong\u003enut position in the prop stack\u003c\/strong\u003e. Confirming whether you need the \u003cstrong\u003efront\u003c\/strong\u003e or \u003cstrong\u003erear\u003c\/strong\u003e nut first is the easiest way to avoid ordering the wrong prop hardware.\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":43563886411812,"sku":"859131","price":59.5,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/5dc203bc-5f9f-4124-99c4-b1115efa0c63.png?v=1777052214","url":"https:\/\/marisolmarine.com\/products\/merc-797","provider":"Marisol Marine Company","version":"1.0","type":"link"}