Mercury - Quicksilver Ignition Tune-Up Kit Prestolite Conventional System GM & Ford Engines 6324Q1. Overview. A strong spark is the heart of every reliable engine, and the Mercury Marine 6324Q1 Quicksilver Ignition Tune-Up Kit helps restore that factory performance. Built for MerCruiser sterndrive and inboard engines made by GM or Ford with Prestolite conventional ignition systems, this kit includes everything you need - condenser, points, and rotor. Whether your engine is starting to idle rough