What Does F6TC Mean on a Generator Spark Plug Instead of F6RTC?
I’ve seen F6TC stamped on a generator spark plug and wondered why it wasn’t the F6RTC I expected. This small difference in letters can affect how your engine runs, so it matters to know what you are actually using. The “R” in F6RTC stands for resistor, which helps reduce electrical noise. An F6TC plug lacks … Read more