I am working on a friend's line trimmer that has this Simple Start feature. I have never come across it before so I am not sure how it works. With the Simple Start engaged, the trimmer will start. As soon as I pull the throttle to disengage the start feature the trimmer dies. Is this most likely a clogged idle circuit or something wrong with the Simple Start feature. I was planning to strip the carb and soak it in cleaner. There appears to be just one screw that attaches the starting unit to the carb. Thanks for your replies.