I changed the oil, oil filter, and hydraulic filter in my mower. After doing this I went to start the mower. The mower fired up, then the engine began running very rough and started shooting what appeared to be fuel that was not burnt out of the muffler. So, I shut down the engine, waited a little bit and now the engine will not turn at all. Does anyone have any suggestions on how to go about fixing the problem or what I need to check? Thank in advance for any advice you all are willing to give.