A steady idle isn't just about comfort-it's about performance, fuel efficiency, and preventing unnecessary wear on your engine. The Mercury Idle Air Control (IAC) Valve (897526T) is built to regulate airflow precisely, ensuring your Mercury 4-stroke EFI outboard idles smoothly, accelerates cleanly, and stays reliable in all conditions.. If your outboard is stalling at idle, struggling to maintain consistent RPMs, or running rough at low speeds, this OEM replacement part is a likely fix. Designed to meet Mercury's exacting standards, it integrates seamlessly with models like the 65 HP EFI Jet, 75-115 HP EFI engines, and the 100 Vazer series, delivering long-lasting durability even in demanding marine environments.. Why It Matters:. Consistent Idle Control - Keeps your engine running smoothly at low speeds, reducing surging or stalling.. Optimized Airflow Regulation - Ensures precise fuel-air mixture adjustments for better throttle response.. OEM-Grade Reliability - Built to withstand ex