NGK Iridium IX Spark Plug - 7120

**Editorial Review of the NGK Iridium IX Spark Plug - 7120** The NGK Iridium IX Spark Plug - 7120 has garnered a mix of experiences from customers, particularly those using it in Honda generators and similar applications. Many users have noted a significant improvement in engine performance after switching to these iridium spark plugs. For instance, one user highlighted that their Honda generator, which had been troublesome, finally started reliably after installing this spark plug. Similarly, customers have reported enhanced throttle response and smoother idling in outboard engines following the installation, indicating that the iridium technology provides substantial benefits in challenging conditions, such as high altitudes. Despite these performance upgrades, a common point of contention among users is the absence of a terminal nut included with the spark plug. Several reviews expressed disappointment that NGK did not supply this essential component, leading to additional costs and inconvenience when attempting to find a suitable replacement. While some users found creative workarounds—such as reusing the cap from their old plugs—many felt that the lack of a terminal should have been addressed, especially given the price point of the product. On the whole, the NGK Iridium IX Spark Plug is well-received for its performance enhancements; however, the omission of the terminal nut has left some customers frustrated. Those who are prepared to address this issue seem to greatly appreciate the spark plug's capabilities. **Pros and Cons:** **