Cut my grass last week, 3/4 of the way through got rained on but finished anyway figured mower deck would clogged i would just clean it out this week, but my girlfriends son decided to use it yesterday and he said he started it up and started cutting grass when about 8 feet later it just shut off on him, tried to restart it and it would not start. I go out today start working on it, starter engages but will not turn the motor over, tried moving the motor by hand and it will not budge, i can however turn it backwards a little ways it feels like it is locked up at a certain point. I am lost don't know where to go next?? please help thanks in advance.