Complete Wire Set for MerCruiser Thunderbolt V6

Brand New Ignition Wire Set for MerCruiser. This wire set meets or exceeds OEM specifications.

Replaces part # 84-816761Q16, 84-813720A11, 503751, 18-8810-1

When should you replace your wires?
  • Plug wires or boots are cracked, dried out, or torn
  • Engine is difficult to start, especially in cold or damp weather
  • Fuel economy has decreased
  • Engine stalls or idles rough
  • Poor acceleration

Fits: MerCruiser 4.3L engines from 1985-93 with Thunderbolt ignition systems