Well no leaks so far! I just rebuilt the auto shut off since I already had the parts. So many connections to worry about. I like Tim S's idea of replacing the auto shut off w/ an old style manual shut off sed bowl and thank him for the well explained directions as to how to do it. I will utilize the change over in the future. Thanks also to jd2cylman. Never thought to use plumbers thread past w/ teflon tape. I twisted the shut off into the tank and attached the line to the carb to hold it in place while I attached the oil lines to keep it from moving. The crank case did fill w/gas which alerted me to the problem. I drained the oil and changed the filter and oil. Replaced the oil w/ Rotella 15w40 and show great pressure. The 530 shows 3186 hrs on a working tach. Only use the tractor for 1 tractor ride (10 hours)a year. I DID NOT FLUSH THE CRANK CASE OUT of gas but let it drain 2 weeks. Will not flushing create any issues considering my usage?