'13 Model T starting

[fords]

I am new to the Ford Barn and look forward to this whole thing.
My 1913 T all of a sudden stopped starting and is kicking back on the hand crank at the 11 o'clock position. Before this -it would start fine and would usually start at the 12:30 position on the hand crank. I just ordered new plugs(Champions) and will set them to .25. Any other input from anyone would be much appreciated.