{"product_id":"merc-806","title":"Mercury MerCruiser Fuel Pressure Regulator Kit 861126A1","description":"\u003cp\u003eMercury MerCruiser Quicksilver 861126A1 is a genuine OEM fuel pressure regulator used on a range of MerCruiser MPI sterndrive and inboard engines. Mercury’s current product page identifies it as a fuel pressure regulator that mounts on the fuel cooler and is used on MerCruiser 4.3L, 5.0L, 5.7L, and 6.2L MPI engines with ECM 555, as well as 7.4L MPI (L29), 454 Magnum MPI, 496 Magnum and HO, 500 EFI, and 8.1S and HO applications.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury MerCruiser OEM part number \u003cstrong\u003e861126A1\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eOfficially identified as a \u003cstrong\u003efuel pressure regulator\u003c\/strong\u003e for MerCruiser MPI fuel systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounts on the fuel cooler\u003c\/strong\u003e in the applicable fuel system layout.\u003c\/li\u003e\n\u003cli\u003eCurrent Mercury dealer references identify it as a \u003cstrong\u003e43 PSI regulator kit\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCurrent dealer listing shows \u003cstrong\u003eUPC \/ GTIN 745061448353\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCurrent Mercury references support 861126A1 for \u003cstrong\u003eMerCruiser 4.3L, 5.0L, 5.7L, and 6.2L MPI sterndrive and inboard engines with ECM 555\u003c\/strong\u003e, plus \u003cstrong\u003e7.4L MPI (L29), 454 Magnum MPI, 496 Magnum and HO, 500 EFI, and 8.1S and HO\u003c\/strong\u003e applications. Current dealer fitment references also describe it for MCM and MIE MPI installations in those same engine families.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eVerify fitment by exact \u003cstrong\u003eengine serial number\u003c\/strong\u003e, \u003cstrong\u003efuel system layout\u003c\/strong\u003e, and \u003cstrong\u003eservice manual application\u003c\/strong\u003e before ordering. With 861126A1, the important check is the correct \u003cstrong\u003eMPI \/ ECM 555 \/ fuel-cooler-mounted regulator\u003c\/strong\u003e setup, because similar MerCruiser fuel system parts can appear close while serving different pressure or mounting requirements.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis regulator is typically replaced when fuel pressure control becomes unreliable or when diagnosis points to a failed or weak regulator in the MPI fuel system. In practical service terms, issues such as poor running, hard starting, or fuel-pressure inconsistency can lead technicians to this part, but the exact diagnosis should always be confirmed against pressure testing and the service manual. This replacement guidance is a practical service inference based on the part’s documented role as the engine’s fuel pressure regulator.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eInstall 861126A1 only after confirming the correct MerCruiser fuel system application for the engine being serviced. Current Mercury references state that the regulator \u003cstrong\u003emounts on the fuel cooler\u003c\/strong\u003e, and Mercury directs owners and technicians to the owner’s manual or service manual for exact application and installation instructions.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCurrent sources reviewed consistently show \u003cstrong\u003e861126A1\u003c\/strong\u003e as the active OEM Mercury number. Dealer and aftermarket cross-reference sources also associate \u003cstrong\u003eAM861126A1\u003c\/strong\u003e and \u003cstrong\u003eMAL9-33206\u003c\/strong\u003e as related aftermarket references for this same regulator application.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe easy mistake with a fuel regulator like this is matching it only by engine size. For 861126A1, the better match is the exact \u003cstrong\u003eMPI fuel system, ECM 555 setup, and fuel-cooler-mounted regulator layout\u003c\/strong\u003e, because that matters more than the displacement alone when you want the fuel system to perform the way it should.\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":43563886739492,"sku":"861126A1","price":295.06,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/f3778a98-6ef1-4152-8e58-d4a8b55f6ddc.png?v=1776804576","url":"https:\/\/marisolmarine.com\/products\/merc-806","provider":"Marisol Marine Company","version":"1.0","type":"link"}