Mercury - Quicksilver 816761Q13 Spark Plug Wire Kit 3.0L & LX MerCruiser Engines Delco Digital Ignition 816761Q13. Overview. Reliable ignition starts with the right connection. The Quicksilver 816761Q13 Spark Plug Wire Kit keeps your 3.0L and LX MerCruiser engines (1990-1995) running smooth and firing strong. Designed for Delco digital ignition systems, this OEM wire set ensures clean spark delivery, steady idle, and long-term reliability in real marine conditions.. Each wire is precision-cut to