hmmm sounds very weird to me..........haveu tried any other plugs such as the duratrax gold racing plug or the OS a5 or the LRP R5??? i have used all these plugs except for the os a5 because i just bought 1 and they are all very good....i think ur engine has an air leak causing it to run lean and wen u run out of fuel it overleans the engine aLOT and then burns out ur plug....if u keep having this problem u might want to rip ur engine apart and replace all the gaskets.....


how much % nitro are u running?