I was out mowing this morning and hit a small rope that was hidden in the grass. The engine and blade quit immediately. I removed the rope quite easily but when I tried to start back up it just kinda goes thump. The blade spins freely when disengaged but if I engage the blade it will turn about half a rotation and then stops. It's like the crankshaft gets hung up on something. Any help would be appreciated.
Remove the belts then remove the spark plug
Try rotating the engine backwards & forwards
If you can not then pull the rocker cover off.
A sudden abrupt stop can cause a pushrod to jump off the rocker, fall into the engine and jamb it.
It can do a lot more damage, buts lets be hopeful for now.