I have a Hustler MFT 42 with the Kohler 17. The problem I am having is the engine raced higher than normal in the middle of a cut, then I could not slow the engine down with the throttle, I pulled the lever back and the engine continued to race. So then the engine started to act like it was out of gas and then just stopped running. I let it sit for awhile then it started and I finished the yard, but on half power, it would not run full speed. I went out today and did all the normal service, fuel filter, air filter and spark plug and it is running normal, but it tends to bog a bit like the engine slows down and needs to catch up. I am thinking that it is the fuel pump, becasue the fuel filter looks like it is almost empty when it is running, or maybe that is the way it is, I don't know. Any help here guys.