Picked up a good used 2006 super z. Have a few questions.

Hello, I'm ryan. I been reading and looking over this site for some time now and I recently acquired a mower and need to get it in fully operational condition. It has a few minor issues I'd just like to see what you guys think. I did use the search function to figure out a few other issues, but these are the more pressing issues;

-it has the Kohler cv740-0028 engine that has 1,400 hours of mostly meticulous maintenance. However it has issue right now of getting full rpm/power and...

Picked up a good used 2006 super z. Have a few questions.