I want to thank both old and Steve for your suggestions. I have a CD with service manual on it and it shows two types of carbs and I think mine may be a Zenith. The photo shows two drain cocks, one on the left side sort of on the end of a horizontal tube in the botton and one that I presume is supposed to be verticle on the side of the carb closer to the block. Mine just has bolts instead of drain cocks and I removed the bolt on the left side and gas drained freely and was clear with no rust or dirt particles. The back verticle bolt was very tight and I did not force it. The sight glass bowl remained full. Not sure where the suction tube in the gas tank is, presume above the sight glass going into the tank? Did drop the pan on the oil filter, the bottom of the filter seemed a little dirty, cleaned that off, the tube was clear, no mud dauber nests in cap. Gas cap probably not original, but I loosened it to make sure air flow into tank. Still have the problem. Plan on tomorrow pulling the air filter and flushing it out, it does not seem to want to drop out or be pulled out. Bill C
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