Re: Spark Plugs

Posted by JWL On 2012/9/11 10:27:49

In ancient Champion speak: J series = 3/8" reach; H series = 7/16" reach; and N series = 3/4" reach. Each series had a range of heat ranges. Also, each series was offered in projected electrode ("Y" designated) and standard electrode; resistor ("R" designated) and non-resistor; and copper core ("C" designated) or standard core.

(o[]o)