ORIGINAL: akschu
Also, I thought the F plug was cold since that is what OS says it is on the chart:
Though it does make a ton of sense for it to be hot since your only heating it every other stroke.
Thought I had seen that the F was hot, but now I cannot see it anywhere? I apologize for what appears to by misinformation by me.[&:]
This is where I have seen heat ranges before:
http://www.os-engines.co.jp/english/...g/pluindex.htm