Hi guys, I'm new to this forum. I have a Homelite EZ auto chainsaw. (Made from 1969 to 1971). I rebuilt the carburetor but it will not idle. Adjusting the idle screw does nothing. It will run while giving it gas but dies when you let off the gas. I don't know what I did wrong. I was looking on line for a replacement carb but have had no luck in finding one. It has a walbro hdc carb. An online manual says it has a HDC 1 carb. On the carb itself it has HDC casted in the side with a number 4 stamped into to it. I have looked at numerous carbs on ebay and amazon but none look exactly like this one. This only has 1 gas inlet tube. A lot of pictures have 2 inlets. I suppose the other one is for a primer but I'm not sure. Does anyone have any idea why the chainsaw won't idle, or where I can get a new carburetor? Any help would be appreciated. Thank you.