Tell me about this plug

[tomdcoker]

I have that chart hanging on the wall in my garage lol, it doesn't look like any of them. It is almost like an ashy buildup. If I scrape it off with my fingernail it is a nice tan underneath. I was running some outboard premix instead of my normal oil because I had it laying around, maybe that's it. I have since switched back to my normal 32:1 I ran in all my 2-stroke equipment. I put a new plug in it tonight and I seem to have it running pretty good. Will keep an eye on the new one.

I am not an expert and am surprised that no one has mentioned it, but one of the first things that I learned on this site is not to use outboard oil in chainsaws. I do not know if this is your problem, but changing oil would be the first thing that I would try. Tom