Exhausted Owner

I'm an owner of a 2013 JD 825i Gator. There was a problem with the fuel regulator that I got fixed. I thought that this would cure the exhaust coming into the cab. It did not solve the exhaust problem. I was wondering if there are any JD Gator owners out there that have had similar problems and came up with a solution. My unit has only 280 mi. on it.
Thanks for any answers.