I have a Husq. model 128LD trimmer 2010 from lowes. Got it out of the shed and fuel lines were dry rotted, Replaced them the spark plug and fuel filter. The unit starts first pull will idle and run great for about 20 to 30 mins then bogs out and dies, I have cleaned the spark arrestor, Tried running with the fuel cap all the way off, And even tried putting the old spark plug back in, When all that didn't make a difference I took the muffler all the way off, sounded cool but still died. If you let it cool down for 15 mins it will restart and run like new for another 20-30 mins. Also when it dies I have pulled the plug and its still fireing and dry. Do I have a lazy trimmer or is there something I have missed? Any help would be greatly appriciated. TY in advance