Spark Plug for MERCRUISER GM Big Block 330 (454 cid), 340, 400, 454, 7.4L, 8.2L

This listing is about one (1) NGK Spark Plug for the following MERCRUISER GM - Big Block inboard engines, which replaces OEM Part #CWC 7 NJ:

• 330 (454 cid) (1982-1987)
  
• 330 MCM & MIE (454 cid) (1977-1981)
  
• 340
  
• 340 MIE (454 cid) (1981-1987)
  
• 400 Jet
  
• 454 EFI MP
  
• 454 Mag MPI (S/N after 0L002200)
  
• 454 MPI
  
• 7.4L
  
• 7.4L EFI / MPI
  
• 7.4L MPI (S/N up to 0L000000)
  
• 8.2L
  
• 8.2L MPI