huskydave
Addicted to ArboristSite
my guess would be Crank bearings are messed up you may have leaned it out too much on the high speed mixture screw on the carb or run improper oil/fuel ratio the tinging sound could be broken piston rings. If you really want to fix it just try to find another one for parts. Anything can be fixed if you have the knowledge. Take it apart and find out what's wrong and which seals bearings etc need replacing and price out a used one or for to order new parts. Reset the carb to factory settings and go from there If your cylinder is scored and the piston is toast you may just want to throw this saw away or sell for parts as it is not worth enough money to sink a lot of coin into.