Home › Forum › Ask A Member › J11 spark plug replacement question. › Re: J11 spark plug replacement question.
April 17, 2016 at 11:53 am
#34936
Wrong thread length or extended tips present a danger of banging into the top of the piston. On top of that, "R" plugs are resistor plugs, to be avoided in magneto equipped engines. As I have proclaimed many times, plug mfrs are telling us to use anything that will fit the hole, and some that don’t even fit.