Mercury - Quicksilver 808483Q2 Distributor Cap Kit Marinized GM V8 Engines Delco HEI Ignition 808483Q2. Overview. When you turn the key and that big V8 comes alive - quick spark, steady idle, and that deep note through the transom - you know your ignition system's doing its job. The Quicksilver 808483Q2 Distributor Cap Kit helps make that happen every single time. Built for 1998 and newer marinized GM-based MerCruiser V8 engines with Delco HEI ignition systems, this OEM-quality cap is made to ta