My major is choked down when i put the oil bath cup back on the breather. i have tried 3diffrent cups off other majors and same thing, i have looked for any reason that would cause this problem, remove the oil cup and the engin runs purfect. i have looked down the intake tube it's wide open, the screen inside the air cleaner is clean, if it was pluged the enging wouldn't run very well anytime. I have used diesel in the oil bath and thinking maybe some dirt will wash down after a while. the diesel in the oil cup gets sucked into the engin. before i installed the air bath, i remvoed it from the tractor and used a hot water pressure washer them put the cup back on and filled it with hot soapy water and let it set, did this 2 times, the down draft pipe isn't too low eather, i have looked at other majors air breathers and there just like mine. I loose 10 hp on the dyno with the oil cup on, anybody else had this problem?