HELP! Does anyone have any idea on the problem I have with the KOHLER 25h.p. COMMAND OHV engine. The problem is that at any moment the engine looses half of its power when the blade is in use. The sound of the engine is different than it use to be. I had the carb changed a month ago and it was running great for a while then yesterday I noticed the problem. I replaced the air cleaner and spark plugs today it was ok for a few minutes then it acted up again. By the way it is on a 61" Great Dane Chariot.