Sierra MerCruiser Thunderbolt Spark Plug Wire Set

Sierra MerCruiser Thunderbolt spark plug wire sets are marine ignition wire sets. They replace worn or damaged wires on MerCruiser stern drive engines with Thunderbolt electronic ignition systems. Each set is built for marine use, so it helps the engine start reliably, idle smoothly and deliver steady spark. Sierra offers the line in several configurations, including V6 and V8 versions.

Key Features:

• Kevlar core for durability and long service life
• Stainless steel wound conductor for dependable spark delivery and engine performance
• Silicone jacketing and boots for high-temperature protection
• RFI suppression to protect sensitive electronic ignition systems
• Corrosion-resistant stainless steel spark plug and distributor terminals for good conductivity
• Cut to specific lead lengths for the engine application, with a coil wire included in the sets that list one

Sierra designs its replacement engine parts to meet or exceed OEM requirements. Choose the child item that matches your engine's cylinder count and ignition system to get the correct wire set for your MerCruiser.