Possible spark plugs:

  • AC Delco: SPM40FFX

Details about your spark plug:

  • Type: MARINE
  • Thread size: n/a (0 inches)
  • Hex size: N/A inches (0 mm)
  • Reach: N/A inches (0 mm)
  • Seat type: N/A
  • Projected tip: N/A

Convert another spark plug:

spark plug converter: