Ok, how can you tell when its bad? Can these plugs handle carbon and fouling and still run like new after cleaning. The reason for this post is becouse I have a bme 50 that i cant get to run right. Ive chased the needles every wich way and cant get it to be smooth. Is it hard to check timing on these engines to see if it has moved from factory? Sorry to sound like a dumb***** but this thing is driving me crazy. I couldnt do the maiden on my new wildhare becouse it ran so bad. This is my first gasser and nobody at our field can help I can tune any little 2 stroke nitro engine this thing should be easier to tune there not complex at all. I get a lag on throttle up from idle and then it runs fine very snappy until it idles for a minute then the lag is back. It tends to idle down low until i clean it out if i lean the low end it hangs high and then drops down if i richen any the delay gets worse.I dont want to send it back just to tune it or have them tell me i have a bad plug nobody in austin stocks the ngk 6 plugs so im going to order a bunch and see what happens. Any help would be great sorry about the grammer im frustrated

jeremy