Mercury/MerCruiser NGK Spark Plug ITR4A15 - 8M0204739

Mercury/MerCruiser NGK Spark Plug ITR4A15 - 8M0204739 

The ITR4A-15 spark plugs come pre-gapped as specified by your engine manufacturer. 

Worn or damaged spark plugs can lead to engine misfires, poor fuel economy, rough idling, difficulty starting the engine, and decreased engine performance, ultimately affecting your overall efficiency and potentially causing further damage if left ignored. It is essential to replace the spark plugs on your outboard engines every year or 300hr. These spark plugs are sold individually.

Fits:

• 4.3L MPI Alhpa RWC (SN 0M615000 & Above)
  • 6 Required
• 4.3L MPI Bravo RWC (SN 0M615000 & Above)
  • 6 Required
• 5.0L / 5.7L MPI Alpha RWC – GM (SN 0W06000 & Above)
  • 8 Required
• 5.0L / 5.7L / 6.2L MPI Bravo RWC – GM (SN 0W0600 & Above)
  • 8 Required

Alternative Part #s: 8M2018369 & 884019001