Husqvarna L125 Trimmer runs 5-10 min then dies?

I have a Husky L125 Trimmer. Runs for 5-10 minutes then dies. I can hit primmer bulb and it will run again. Seems like loosing gas vaccum. I put on new gas lines, carb kit, ignition, fresh gas. Checked the duck bill in gas cap. I am baffled...can you help?.
Rusco, June 2011


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