Thunderbolt V6 (2004-15) Spark Plug Wire Set
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Quicksilver Thunderbolt V6 (2004-15) Spark Plug Wire Set
The Quicksilver 84-863656A04 Spark Plug Wire Set is a genuine Mercury Marine OEM ignition cable kit engineered specifically for MerCruiser GM V-6 262 CID engines using a Thunderbolt IV electronic distributor ignition system, manufactured from 2004 through 2015. This is not an aftermarket substitute — it is the exact factory-specification replacement component, ensuring a guaranteed fit and compatibility with your engine's ignition system.
Featuring distinctive blue marine-grade wires, the set is pre-cut and pre-terminated for straightforward, professional-quality installation. The wires are built to withstand the harsh realities of the marine environment, including prolonged exposure to moisture, saltwater, bilge fumes, and wide temperature swings. By maintaining proper electrical connections between distributor and spark plugs, this wire set supports consistent spark delivery, reliable cold starting, and smooth engine operation across the RPM range.
Compatible applications include the 4.3L carbureted Alpha/Bravo stern drive configurations across a wide serial number range (0W300013 and up), making it a versatile solution for a broad population of MerCruiser V-6 powered boats. Regular inspection and timely replacement of ignition wiring prevents misfires, rough running, and hard-start conditions that can leave you stranded on the water.
Key Features
- Genuine Quicksilver OEM part — not aftermarket — for guaranteed fit and compatibility
- Designed for GM V-6 262 CID engines with Thunderbolt IV ignition (2004–2015)
- Blue marine-grade wires resistant to moisture, salt, and corrosion
- Pre-cut and terminated for straightforward installation
- Restores reliable spark delivery for consistent engine performance and starting
- Direct replacement for worn or damaged ignition wiring
- Compatible with 4.3L carbureted Alpha/Bravo MerCruiser stern drive applications
- Weighs approximately 1.09 lbs; package dimensions 11.50 × 11.50 × 2.25 inches
