Stihl 81 weed wacker trouble starting

[Sean McGillicuddy]

My Stihl 81 weed wacker runs real nice when I have it going the high adjusted to a nice speed and sound!
Here is the problem.
I can't start it the next day or so.
Am I'm destined to readjust low and high carb screws to one turn open every time?
What's the secret?
Thanks
Sean

 

[WES999]

Replace the carb diaphragms. My Stihl weed whacker got harder and harder to start, and then wouldn't, the diaphragms were hard as a rock, changed them and now runs good.

 

[lazeedan]

Replace the carb diaphragms. My Stihl weed whacker got harder and harder to start, and then wouldn't, the diaphragms were hard as a rock, changed them and now runs good.

I agree. Carb clean and rebuild should do the trick.