I have a 33cc Poulan model p3314 type 1 chainsaw that won,t start back.  Made a loud clang when cutting a small branch like the chainbrake was engaged but .wasn't.  fairly new took good care to run the right mixture of gas oiled chain good etc. Locked up then I was able to get it to turn freely.  pulls ok but won't hit a lick.  Does anyone have an opinion on whats wrong with it??  Ran great before that! Do not believe it threw a rod just don't know! Thanks for anyones advice!JamesVA