Zero turn burning oil at high rate
Have a Toro Z5000 (74370) with a single cylinder Kohler Courage engine @ 21HP. Tractor has been running good until yesterday morning. I was mowing a neighbors yard and the engine all of sudden started stuttering, losing power and cutting out. Got it back to my garage to inspect. I eventually found that the carb had come loose which I;'m guessing was starving the engine of fuel. Tightened the carb back down. Tractor fired right up so I finished the neighbors yard. I thought I detected a whiff of exhuast that smelled like oil burn. Wrote it off as getting some oil on the muffler. So today I mow my own yard which is 2 acres. I smell the same odor as yesterday. I don't really see smoke coming from the exhaust but the smell is there. After I finish mowing I let the mower sit 60 min then I checked the oil level. It was down about a 1/4 of a quart. I see a small amount of oil on the frame just under the air filter housing but no oil is on the air filter itself. I cleaned that area and topped off the oil level. I ran back over my 2 acre yard again with the same result. I lost/burned about 1/4 quart of oil again and there was a small amount of oil again on the exact same spot on the frame. Anyone hazard a guess as to what the heck has happened to cause the tractor to be burning oil all of a sudden ?