warranty

Hello I purchased a Stihl ms291 last August and saw is acting up this spring. After doing a little reading, I decided to take a look at the piston through the muffler port. There appears to be scoring and rings seem very tight.(pictures attachted) Just wondering my path forward? I’m planning...

I've got a 4 month old MS250. I've had like 6 tanks of fuel thru it. Lately its stalling when I let it go back to idle. I suspect that all that needs to happen is a small adjustment of the idle speed or mixture. Is this kind of thing covered in the warranty? It still runs great at higher...