I am new here and have a bit of a problem. my craftsman riding mower with a Briggs and Stratton 18.5 HP OHV engine died on me. The engine shut down and now wont turn over. I tried turning the flywheel, but it wont turn. The oil was a little low, but not too bad. I pulled the head off and was able to push the piston down with little resistance. once i did this i was able to turn the flywheel till the piston reached the top, but no further. After the piston is pushed down the flywheel will spin in reverse for a while and stop, I can then go foward with it, but only till the piston gets back to the top. What might my problem be, can it be repaired?
Any help greatly appreciated.