The higher arc voltage contains more energy proportional to the voltage squared so you get a hotter spark with the higher voltage. The compelling argument against resistor plugs has always been one centered on this logic. Beru Silverstone Worlds No 1 High Performance Non Resistor Spark Plugs Rcj8y And Rcj8 Are Different Bob Is The Oil Guy Find My Engine Spark Plug Gap Vanguard Commercial Power I didnt know mowers had sensitive electronics on them unless it would be the hour meters etc stuff like that. Resistor vs non resistor spark plugs lawn mowers . It is for this reason that most racing plugs are non resistor types. Use of non inductive resistor type plugs on these motors can create an open circuit within the spark plug it will become a dead plug. The difference between resistorand none resistor spark plugsthe none resistor plug the perks the none resisto...