Mercury - QL76V Spark Plug (4-Pack) Ignition Component Copper Core & Ceramic Part Number 896329898. Overview. Every boater knows that a reliable engine doesn't start with the throttle or the fuel it starts with a clean, steady spark. The Quicksilver QL76V Spark Plug delivers that dependable ignition that keeps your engine feeling sharp from the moment you turn the key to the moment you head back to the dock. It's the kind of plug that quietly does its job trip after trip, helping the motor fire