AC Resistor Spark Plug #MR43T

The AC Delco MR43T resistor spark plug is purpose-built for marine engines, delivering dependable ignition across jet boats, inboards, outboards, and personal watercraft. Its copper core excels at heat dissipation, maintaining stable operating temperatures under variable loads while maximizing electrode longevity. The ribbed suppressor seal resists degradation and effectively prevents spark flash-over and misfires that can compromise engine performance. Protected by a nickel-chrome alloy sheath, the center electrode resists corrosion in harsh marine environments. With outstanding suppression characteristics and high-quality construction, this specialty marine plug provides the reliability and efficiency marine operators demand.