{"product_id":"mercury-mercruiser-idle-air-control-valve-8m0181068-mpi","title":"Mercury MerCruiser Idle Air Control Valve — OEM 8M0181068 | MPI Engines","description":"\u003ch2\u003eMercury MerCruiser Idle Air Control Valve — OEM 8M0181068 | MPI Engines\u003c\/h2\u003e\u003cp\u003eThe idle air control (IAC) valve is the component that lets your MerCruiser MPI engine maintain a stable idle during start-up, warm-up, shifting, and low-speed operation. By regulating airflow around the throttle plate, it gives the engine-management system the precise control it needs to hold a consistent idle under changing load conditions. When an IAC valve starts to stick or fail, the symptoms are hard to miss: rough idle, stalling, difficult starts, or unstable RPM at low speed. This genuine OEM replacement restores that control exactly as Mercury designed it.\u003c\/p\u003e\u003ch2\u003ePart Information\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 8M0181068\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury \/ Quicksilver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Idle Air Control (IAC) valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersedes:\u003c\/strong\u003e \u003ca href=\"\/products\/mercury-mercruiser-mpi-idle-air-control-valve-862998\"\u003e862998\u003c\/a\u003e and 8M0045797\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAftermarket Cross-Reference:\u003c\/strong\u003e Sierra 18-7701\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Fuel injection \/ engine-management (ECM 555)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN \/ UPC:\u003c\/strong\u003e 745061463844\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser 3.0L MPI — mechanical-throttle configuration\u003c\/li\u003e\n\u003cli\u003eMerCruiser V6 MPI\u003c\/li\u003e\n\u003cli\u003eMerCruiser 5.0L MPI\u003c\/li\u003e\n\u003cli\u003eMerCruiser 5.7L \/ 350 MPI\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6.2L MPI\u003c\/li\u003e\n\u003cli\u003eMerCruiser 496 MAG \/ 8.1L\u003c\/li\u003e\n\u003cli\u003eSelected MerCruiser 8.2L MAG \/ 8.2L MAG HO applications\u003c\/li\u003e\n\u003cli\u003eFitment varies by engine generation, throttle system, and serial range — confirm engine model and serial number before ordering\u003c\/li\u003e\n\u003cli\u003eNote: DTS-equipped MerCruiser engines use different idle-control strategies and should not be assumed compatible based on displacement alone\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Parts\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003ca href=\"\/products\/mercury-mercruiser-mpi-idle-air-control-valve-862998\"\u003eMercury MerCruiser MPI Idle Air Control Valve 862998\u003c\/a\u003e — earlier superseded part number\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eWhen to Replace\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEngine idles roughly, surges, or stalls at low RPM\u003c\/li\u003e\n\u003cli\u003eUnstable idle speed during warm-up or when shifting into gear\u003c\/li\u003e\n\u003cli\u003eDifficult starting or engine hesitation at low load\u003c\/li\u003e\n\u003cli\u003eDiagnostic testing confirms the IAC valve is no longer controlling bypass airflow correctly\u003c\/li\u003e\n\u003cli\u003eVisible sticking, carbon build-up, or damage on inspection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eInspect the IAC air passage and mounting surface for carbon deposits before installing the new valve\u003c\/li\u003e\n\u003cli\u003eCheck the IAC electrical connector and wiring for corrosion or damage\u003c\/li\u003e\n\u003cli\u003eUse the correct gasket or seal arrangement specified for the engine\u003c\/li\u003e\n\u003cli\u003eInspect the related IAC filter (OEM reference 865266) during replacement and replace if blocked or deteriorated\u003c\/li\u003e\n\u003cli\u003eFollow Mercury service procedures for installation and post-installation diagnostic checks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat did 8M0181068 replace?\u003c\/strong\u003e\u003cbr\u003e8M0181068 supersedes both \u003ca href=\"\/products\/mercury-mercruiser-mpi-idle-air-control-valve-862998\"\u003e862998\u003c\/a\u003e and 8M0045797. If you have been ordering either of those part numbers, 8M0181068 is the current OEM replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fit my DTS MerCruiser engine?\u003c\/strong\u003e\u003cbr\u003eNot necessarily. DTS (Digital Throttle \u0026amp; Shift) equipped MerCruiser engines use different idle-control strategies and electronic throttle control. The conventional IAC valve is specific to mechanical-throttle MPI systems. Always confirm using your engine serial number and existing IAC part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs displacement alone enough to confirm fitment?\u003c\/strong\u003e\u003cbr\u003eNo. MerCruiser used different IAC valve configurations across engine generations and throttle systems, even within the same displacement. The safest approach is to cross-reference the existing IAC part number (862998 or 8M0045797) with your engine serial number.\u003c\/p\u003e\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\u003cp\u003eIAC valves are one of the most commonly misdiagnosed parts on MerCruiser MPI engines — a sticking or dirty IAC is often mistaken for a fuel delivery problem, a throttle position sensor fault, or even a timing issue. If a customer reports a rough idle or stalling on an MPI engine and sensor diagnostics come back clean, the IAC valve is the next thing to check. The most important fitment detail is confirming the engine uses a conventional mechanical-throttle MPI system, not DTS — displacement alone will not confirm this. Always ask for the existing part number and serial number before ordering. Browse the full \u003ca href=\"\/collections\/mercury-mercruiser-engine-maintenance-parts\"\u003eMercury MerCruiser Engine Maintenance Parts\u003c\/a\u003e collection for related fuel system and engine-management components.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":51324694429732,"sku":"8M0181068","price":330.71,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/ff649b65-e5ac-4221-a356-c9535b00ff09.png?v=1788204927","url":"https:\/\/marisolmarine.com\/products\/mercury-mercruiser-idle-air-control-valve-8m0181068-mpi","provider":"Marisol Marine Company","version":"1.0","type":"link"}