Bring it to me to look at. I was the highest certified Stihl tech you can get for 10 years. I still have hook ups with people at howard brothers and could get them to look at it too.
Y’all must being doing something wrong. Stihl is the best out there. Period.
I was a small engine tech for 6 years. Highest levels of training/certifications you could get on most major brands.
99% of issues were all self induced.