NGK Laser Iridium spark plugs (ITR4A-15) feature a fine-wire tipped center electrode for superior ignitability and a long service life. The trivalent metal plating provides anti-corrosion and anti-seizing properties, making removal easier in the harsh marine environment. These plugs come pre-gapped to meet your engine manufacturer’s specific requirements for stable idle and improved fuel efficiency.
- Fine-wire center electrode for stable idle and lower emissions
- Laser Iridium delivers superior anti-fouling and long life
- Ribbed suppressor seal prevents spark "flash over" and misfires
- Trivalent metal plating for superior corrosion resistance
- Meets Mercury Marine original equipment manufacturer specifications
