[austin]

Have cleaned the carb / screen. Still won't run long withou about 1/2 choke.
Have replaced carb- semed to run OK for about 2 hours.
Am looking at fuel line(s) / fuel filter.
Am I on the right track , or is it time to gat a new one ?
ALso have a craftsman chain saw with same symptoms.
Thanks
Austin

 

[hankster]

Generally if you have to run it at 1/2 choke the needle settings are a little lean. Try opening up the high end needle 1/4 turn.

 

[snoman]

austin
If it runs with 1/2 choke then it means it's not getting enough fuel. It could be a number of things but the first is to richen up the High speed needle. You said you replaced the carb....with a NEW one? or a used one that you sprayed carb cleaner onto? Normally to clean a carb, I completely disassemble it then soak it in an approved carb cleaner solution then replace all the parts in the kit.
Check the lines and filters but I think I'd lean towards the carb right now without seeing or hearing the machine run.

snoman

 

[austin]

Replaced with a new carb. Did run OK for a bit , but now back to same thing- need to choke it to continue to run.
Austin

 

[David Washburn]

did u try the needle thing, or maybe a hole in your fuel line