Mercury - Quicksilver Engine Starter PWC Starting Series Durable Marine Construction 8M6007437. Overview. There is a familiar thrill that comes with starting up an older personal watercraft - that split second when you hit the button and wait for the engine to wake. When the starter is dependable, that moment becomes effortless, almost comforting. You hear the engine catch, feel the hull shift beneath you, and suddenly the whole day opens up with possibility. The Mercury Marine part number 8M600