im running the mach .26 with MC59 plugs and each one lasts 1 run till it burns out but runs fine till it stalls or runs outta gas then the plugs dunfor
i dont think its the tuning cuz ive even treyed running it a little on the rich side.........................................

is it a bad batch of plugs
any input would be helpfull

Possible air leak???blowing out lots of smoke but still getting hot=air leak And will usually total a plug every run.../or your piston and sleeve are ready for a pinch/replacement

Ya I whould think it's a air leak too!!

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?