NGK Spark Plug Stock # 7510

The NGK Spark Plug Stock # 7510 is a premium iridium ignition component engineered for reliable cold-start performance and extended service intervals across a wide range of small-displacement and mid-size engines. This resistor-type spark plug delivers consistent spark generation in both demanding field conditions and standard operational environments, making it an essential maintenance item for equipment owners who prioritize dependable ignition and fuel efficiency.

Featuring iridium electrodes, the WR5IX construction provides superior durability and thermal stability compared to conventional copper-core designs, resulting in longer plug life and reduced replacement frequency. The tapered seat design ensures a secure, gas-tight fit in standard 18 mm threaded engine heads, while the 0.370 inch reach specification prevents fouling and maintains optimal flame kernel positioning within the combustion chamber. NGK's resistor technology suppresses electrical noise and protects sensitive engine management systems from electromagnetic interference, contributing to cleaner emissions and smoother operation.

This spark plug is ideal for small-engine power equipment, lawn care machinery, portable generators, and utility engines where reliable starting and consistent performance are non-negotiable. Installation is straightforward—the compact 3.5-inch overall length and standard 18 mm thread pattern fit most OEM engine specifications without modification. For optimal results, verify your equipment's original plug specification against the WR5IX designation to confirm direct compatibility before installation.