I have a cub cadet 112 or 100. The engine runs rough, it sat in the garage for a year. Starts fine. Lots shaking and black smoke from the exhaust. There is no choke on this (I cant find one). Oil level did not change over the last yr as it sat in the garage (so it's not burning or leaking oil?) See this video to listen to the sound and see the shaking, difficult to see the black smoke because it was evening and not too bright outside. What's causing these symptoms and what can I do to help get the engine to run more smoothly and not cause as much black smoke? Is there a choke on this model? Thank you!! Looking forward to your comments.
https://www.youtube.com/watch?v=tEOnWiXjybE