Mercury - Quicksilver Engine Starter Permanent Magnet Direct Drive 12-Volt 8M6007390. Overview. Some mornings on the water feel almost effortless - the air is calm, the tide is fair, and your outboard fires up with a smooth, confident rumble. That moment when the engine responds instantly sets the tone for the whole day, whether you're easing out of a quiet marina or heading straight toward open water. The Quicksilver 8M6007390 starter helps create that feeling. It's steady, reliable, and built