Sorry to be late coming back to here. Was away from the computer yesterday. The 306A has been set aside for now. I'm trying to help a neighbor that has had 2 hickory trees fall in his yard try to clean it up. One tree fell on another and both fell. We've gotten most of the branches cut away but my llittle Homelite isn't much use for the rest. I've had my father in law's Poulan 2150 in the shop for a while and had replaced the gas lines because they were bad but hadn't gotten to anything else. After choking it and it trying to start, I open the choke and it starts but won't stay running. My neighbor says that if the return line isn't in the fuel, that would cause this but I' not sure that I follow that argument. I've tried setting both jets to 1.5 turns and a bunch of other wider settings but nothing seems to help.
By the way, the 306A has set up for at least a year and when I had similar problems, taking the carb out and blowing it out with compressed air had worked but not this time.
Thanks for the ideas so far. This is a great forum.