hello from Dublin Ireland folks!
now go easy on me im new

i have got myself a 08 S STIHL

I am scratching my head with this saw! the "mechanic" that had it for 3 weeks to service it.... well il keep
the profanity out of this post

so as it stands when i start the saw it seems the bar drops and the chain tightens then the engine stalls

i cant see a serial number anywhere on the saw. just dont want to run it to much as im afraid of doing damage to engine
any help/advise would be greatly appreciated