I have a WEED EATER PE550 edger (with steel blade).

Also a WEED EATER FL21 (Lightweight string trimmer).

They both have a spark and good compression but only run for 5 - 10 seconds.

I took the carb off the PE550, blew it out with an air hose, then soaked it overnight in 'carb cleaner'and blew it out again.

This made NO difference to how it ran so I bought a brand new carb. It, too, made NO difference at all, so I bought a brand new filter which, again, made NO difference.

Next I attacked the FL21 which also only runs for 5 - 10 secs. and replaced the fuel lines. but still NO difference. I then blew out the filter but still NO difference.

I would appreciate it if you have a suggestion for me.

TIA

Lewis *****