Mercury - Quicksilver Blue Wire Spark Plug Wire Kit V8 Inboard Ignition System Marine Grade 847701Q26. Overview. The Quicksilver 847701Q26 Blue Wire Spark Plug Wire Kit is made for V8 MerCruiser 377 Scorpion engines built between 1999 and 2000. Each wire is built to factory length and fitted with high-quality boots, ready to plug in and go. Designed by Mercury Marine, this OEM set delivers the strong, consistent spark that a performance engine like the Scorpion demands. It's tough, dependable, a