Cub Cadet HDS 2155 Won't Crank

I have a cub cadet hds 2155. Model 13a-244g100 s/n 379973. The engine will not crank consistently. I hear it click, but will not crank. Sometimes it will crank and starts fine, but most of the time it will just click. It sounds like the starter is stuck.

I have replaced the battery and battery cables.