Mercury - Quicksilver 819503T6 Solenoid Kit Force 40-120HP Outboards 819503T6. Overview. If you turn the key and hear a click instead of a crank, your solenoid might be the problem. The Mercury 819503T6 Solenoid Kit is the simple, OEM fix that gets your Force 40-120HP outboard starting strong again.. Built to Mercury's factory standards, this solenoid is tough enough for the marine life - sealed tight against salt, spray, and vibration. It's a direct replacement that bolts right in, restoring cl