I had one with about 8 hours on it that would only run on choke. They adjusted it to have it do the same thing. They adjusted it again and imediately it would not run without choke. They then replaced the carb. I am not impressed by Echo anymore.
“Rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add "within the limits of the law" because law is often but the tyrant's will, and always so when it violates the rights of the individual.” - Thomas Jefferson