Echo SRM 1500 starts but then dies, New Carb ???

Hey, I have an older Echo SRM 1500 trimmer. It has given many years of great service, but now it will not continue to run after it is started. I have put in fresh non-ethanol fuel mix with a touch of Seafoam. Should I also replace the carb? I'm thinking yes. In thinking this through, my SRM 1500 does not have a primer bulb. Is there a way to add this to the trimmer? If so who would have such? Thanks so much for the help!!!
Rowdy Raven

Echo SRM 1500 starts but then dies, New Carb ???