Mercury - Ignition Coil FourStroke & Verado Series High-Output Pencil Design 880615T01. Overview. There are a few parts on your outboard you never want to second-guess, and the ignition coil is one of them. When you turn the key, you expect your engine to fire instantly-clean, strong, and ready to run. The Mercury 880615T01 Ignition Coil delivers that kind of confidence. It is the quiet little part that makes every smooth launch, every long idle out of the marina, and every hard pull onto plane