briggs & stratton 10a902 2286?

i was trying to star my mower today and i pulled on it 4 or 5 times then it was stuck i took the houseing off and checked the pully and spring and all was fine so i put it all back on and tried it again and nothing it just wont turn well maybe alittle but that's only if i use a socket wrench to turn it my self and even thats hard to do in both dierections please help if u can
thanks