i was riding my ac 185s today and i started hearing grinding noise come from my chain i thaught i flip my chain so i shut it off . i looked at my chain nothing was wrong with . Then i went to start it and the string would not come. it feels like the
pistion is stuck but then my oil level is on full line what did i do to it . help pls tell me .

 

The only thing you can do is start looking at the simple obvious
Remove spark plug
Look at plug
Look in cylinder
Then keep looking
Good luck
Ray