Sierra Spark Plug Wire Set for MerCruiser Stern Drive Engines

Sierra marine spark plug wire sets (also called ignition wire sets or plug leads) are made as replacements for MerCruiser stern drive engines. They are built for marine use, so they handle the heat, vibration, and moisture of a engine compartment. Each set restores reliable spark delivery for steady starting, smooth running, and consistent power.

Key Features:

• Kevlar core for durability and long service life
• Stainless steel wound conductor to support spark delivery and engine performance
• Silicone jacketing and boots for high-temperature protection
• RFI suppression to help protect sensitive marine electronic ignition and engine control systems
• OE-style boots that help keep out heat, dirt, and moisture
• Made as aftermarket replacements for the original MerCruiser/Mercury wire sets

Sierra offers several wire set versions to match different MerCruiser engine and ignition configurations. Choose the part number that matches your engine and ignition system.