Hi all

My father is having trouble with his brushcutter & hope you can help.

STIHL F580AVR wipper snipper
TK carburettor casting mark. Stamped - 5E10NB
Problem:
Can pump fuel up to carburettor no problem .
Starts up easy .
Start to throttle up at to 3/4 revs then starts to miss as it runs out of fuel .
Can pump fuel up again , start up , rev up , run out of fuel .
Filter in tank seems OK , IDEARS ????

Regards,
Paul