I've been having a lot of problems with the engine on our d-200. It's a Kohler k532s. Long story short, I can't keep it running. I can get it started if I put the choke on cold start and the throttle lever about about midway. It'll run fine for about 30 minutes, but then it dies and it's hard to start until it cools down. I just cleaned and rebuilt the carb, and that seemed to help. If I move the choke lever down towards run, it dies. Also, does anyone know where I can get a fuel filter? We've been having issues with rust from the tank.