Sierra 18-5227-1 Mercury 9" Spark Plug Wire

A 9 in replacement plug lead for Mercury and Mariner ignitions. The 7 mm copper core with a stainless wound conductor carries spark energy without the resistance creep that kills an old lead, and the silicone jacket and boots hold up against the heat under a cowl.

• 9 in length, made for the specific application
• 7 mm copper core with a stainless steel wound conductor
• Premium silicone jacketing and boots for high temperature service
• Corrosion resistant stainless plug and distributor terminals
• Magnetic suppression core for RFI suppression on sensitive electronics
• Replaces Mercury 84-813715A1, Mallory 9-28005 and Redline RL5227

Pull leads by the boot, never the wire, and put a little dielectric grease inside the boot before it goes back on. That is what makes the next one come off easily.