Mercury - Quicksilver 817109A2 Starter Solenoid Mercury & Mariner Outboards OEM Marine Solenoid 817109A2. Overview. When you hit the key, your starter solenoid is what brings your engine to life. The Quicksilver 817109A2 Starter Solenoid is built to deliver reliable starts on a wide range of Mercury and Mariner outboards, giving you factory-level performance every time you turn the key.. This OEM solenoid is made to handle the harsh marine environment - resisting corrosion, vibration, and the he