Mercury - Quicksilver 828623T6 Reed Assembly Mercury 200-250HP OptiMax 2-Stroke Outboards 828623T6. Overview. Your reeds are the gatekeepers of airflow and power in a two-stroke engine. The Quicksilver 828623T6 Reed Assembly restores crisp throttle response and strong top-end pull in Mercury 200-250HP OptiMax outboards.. This OEM reed block is cast from durable aluminum and built to Mercury's exact specifications. Each reed petal is engineered to flex precisely for the right air/fuel flow, impro