Mercury - NGK BPR6ES Spark Plug Pack Ignition System Copper Core 8M0114747. Overview. If you've spent enough time on the water, you know that a dependable spark isn't just a technical detail-it's the beginning of every good outing. There's a certain calm that comes from hearing your engine fire cleanly, especially on those early mornings when the water is glassy and the sky is just starting to lighten. The Quicksilver 8M0114747 NGK BPR6ES Spark Plug pack brings that feeling to life with every tu