Trimmer died in middle of job, just like it ran out of gas, Husqvarna 326 RJX Etech-II, no obvious reason (tank full), inspected fuel lines, all good. Checked in-tank filter, ok. Checked spark arrestor screen (a little oily but not clogged). Tried multiple times to restart...pushed prime bulb, choke, no choke, nothing. Then, after letting engine set a few minutes, I pressed prime bulb several times and engine started but then almost immediately died. Pressed prime bulb several times and engine started and ran a little longer. It will run as long as I can keep pressing prime bulb but will not pull gas from tank. Removed carb and checked integrity of all gaskets, screen, and diaphram, blasted all parts with carb cleaner...no luck, still same results. No apparent loss of vacuum in lines, Any ideas?