I have a Kohler 28hp EFI and I'm having problems with the mower. The engine has 2300 hours on it and it has started using oil. The biggest problem is that it is fouling spark plugs and getting to the point to where it will cut out and almost die. Does anyone have any idea on what could be the problem? What could be causing it to foul plugs? When I say foul plugs, I mean quick. I put brand new spark plugs in and within a day or so they are completely black. Clean them off and put them back in and it will run for a little while longer. Any ideas? Thanks for the help guys!