Hi all. I just rebuilt the carb of my gt245, took deck off for service and when I ran it to test the carb (no deck) there is an occasional knock and it is hard to determine where it is coming from. It didn't do it before and I am wondering without any tension from the mowing belt that maybe some electric clutch noise is finding its way up through the machine. Anyone else experience this? I will be reinstalling the deck tomorrow to test it,just wanted to see if this is common....tractor seems to operate just fine...