Mercury - Quicksilver 818999A2 Starter Solenoid Assembly Mercury 30-60HP Outboards & MerCruiser Sterndrives 818999A2. Overview. Dependable starts begin with the right electrical components. The Quicksilver 818999A2 Starter Solenoid Assembly is built to factory standards for Mercury 30-60HP outboards and select MerCruiser sterndrive engines, ensuring consistent, reliable starting power in any condition.. This solenoid is engineered to handle marine-grade demands - high current loads, heat, vibrat