Mercury - Solenoid Starter FourStroke EFI Outboards Marine-Grade Construction 853809001. Overview. There's nothing quite like the steady hum of a Mercury outboard coming to life - smooth, quick, and confident. That sound starts with a reliable solenoid, and the Mercury Quicksilver 853809001 Solenoid Starter is built to make sure it happens every single time. Whether you're launching before sunrise or firing up after a long day at anchor, this solenoid ensures your outboard starts instantly and c