Mercury - BP7HS Spark Plug Pack Ignition System Copper Core 8M0114744. Overview. There's a certain confidence that comes from knowing your engine is going to fire up cleanly every single time you turn the key. It's a small moment, but it sets the tone for the whole day on the water. The Quicksilver 8M0114744 BP7HS Spark Plug pack brings that steady, dependable spark you count on when the wind is calm, the water is quiet, and you're ready to push off. These plugs help your engine feel responsive