control cable

Hey, first post. I have a 2yr old Cub Cadet Zero turn with a Kohler 7000 24HP. I had an issue getting going from the winter. I ran through the winter gas with no problem, refilled with fresh and all it would do is fall on it's face when I engage the blades, black smoke , black plugs. I took things apart to clean and check things out. Put it back together and have it close to right but I can't seem to hit the control cable position right. It's loading up when I hit a spot of thick grass like it has gone to choke. I'm not really sure it's the control cable but it's the only thing that gives me any results from adjusting.